Nuclear disarmament is the act of reducing or eliminating nuclear weapons . Its end state can also be a nuclear-weapons-free world, in which nuclear weapons are completely eliminated. The term denuclearization is also used to describe the process leading to complete nuclear disarmament.
173-491: Disarmament and non- proliferation treaties have been agreed upon because of the extreme danger intrinsic to nuclear war and the possession of nuclear weapons. Proponents of nuclear disarmament say that it would lessen the probability of nuclear war occurring, especially considering accidents or retaliatory strikes from false alarms. Critics of nuclear disarmament say that it would undermine deterrence and make conventional wars more common. Nuclear disarmament groups include
346-513: A misnomer , as their energy comes from the nucleus of the atom, just as it does with fusion weapons. In fission weapons, a mass of fissile material ( enriched uranium or plutonium ) is forced into supercriticality —allowing an exponential growth of nuclear chain reactions —either by shooting one piece of sub-critical material into another (the "gun" method) or by compression of a sub-critical sphere or cylinder of fissile material using chemically fueled explosive lenses . The latter approach,
519-665: A policy of deliberate ambiguity , it does not acknowledge having them. Germany , Italy , Turkey , Belgium , the Netherlands , and Belarus are nuclear weapons sharing states. South Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons. The Treaty on the Non-Proliferation of Nuclear Weapons aims to reduce the spread of nuclear weapons, but there are different views of its effectiveness. There are two basic types of nuclear weapons: those that derive
692-483: A German nuclear program. These efforts began immediately after the discovery of nuclear fission and its military potential. None of these efforts were explicitly public, because the weapon developments themselves were kept secret until the bombing of Hiroshima . Earnest international efforts to promote nuclear non-proliferation began soon after World War II , when the Truman Administration proposed
865-600: A combination of fission and fusion reactions ( thermonuclear bomb ), producing a nuclear explosion . Both bomb types release large quantities of energy from relatively small amounts of matter . The first test of a fission ("atomic") bomb released an amount of energy approximately equal to 20,000 tons of TNT (84 TJ ). The first thermonuclear ("hydrogen") bomb test released energy approximately equal to 10 million tons of TNT (42 PJ). Nuclear bombs have had yields between 10 tons TNT (the W54 ) and 50 megatons for
1038-696: A conference—called for in the manifesto—in Pugwash, Nova Scotia , Eaton's birthplace. This conference was to be the first of the Pugwash Conferences on Science and World Affairs , held in July 1957. By the 1960s, steps were taken to limit both the proliferation of nuclear weapons to other countries and the environmental effects of nuclear testing . The Partial Nuclear Test Ban Treaty (1963) restricted all nuclear testing to underground nuclear testing , to prevent contamination from nuclear fallout, whereas
1211-577: A decade is the Cooperative Threat Reduction Program (CTR) . While this program has been deemed a success, many believe that its funding levels need to be increased so as to ensure that all dangerous nuclear materials are secured in the most expeditious manner possible. The CTR program has led to several other innovative and important nonproliferation programs that need to continue to be a budget priority in order to ensure that nuclear weapons do not spread to actors hostile to
1384-458: A faster and less vulnerable attack, the development of long-range intercontinental ballistic missiles (ICBMs) and submarine-launched ballistic missiles (SLBMs) has given some nations the ability to plausibly deliver missiles anywhere on the globe with a high likelihood of success. More advanced systems, such as multiple independently targetable reentry vehicles (MIRVs), can launch multiple warheads at different targets from one missile, reducing
1557-614: A few nations possess such weapons or are suspected of seeking them. The only countries known to have detonated nuclear weapons—and acknowledge possessing them—are (chronologically by date of first test) the United States , the Soviet Union (succeeded as a nuclear power by Russia ), the United Kingdom , France , China , India , Pakistan , and North Korea . Israel is believed to possess nuclear weapons, though, in
1730-555: A fission bomb to initiate them. Such a device might provide a simpler path to thermonuclear weapons than one that required the development of fission weapons first, and pure fusion weapons would create significantly less nuclear fallout than other thermonuclear weapons because they would not disperse fission products. In 1998, the United States Department of Energy divulged that the United States had, "...made
1903-421: A fusion weapon as of January 2016 , though this claim is disputed. Thermonuclear weapons are considered much more difficult to successfully design and execute than primitive fission weapons. Almost all of the nuclear weapons deployed today use the thermonuclear design because it results in an explosion hundreds of times stronger than that of a fission bomb of similar weight. Thermonuclear bombs work by using
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#17327662431642076-482: A military defeat assisted this process. In North Korea, the activities concerned took place before the conclusion of its NPT safeguards agreement. With North Korea, the promised provision of commercial power reactors appeared to resolve the situation for a time, but it later withdrew from the NPT and declared it had nuclear weapons. In 1993 a program was initiated to strengthen and extend the classical safeguards system, and
2249-620: A model protocol was agreed by the IAEA Board of Governors 1997. The measures boosted the IAEA's ability to detect undeclared nuclear activities, including those with no connection to the civil fuel cycle. Innovations were of two kinds. Some could be implemented on the basis of IAEA's existing legal authority through safeguards agreements and inspections. Others required further legal authority to be conferred through an Additional Protocol . This must be agreed by each non-weapons state with IAEA, as
2422-472: A nation's economic electronics-based infrastructure. Because the effect is most effectively produced by high altitude nuclear detonations (by military weapons delivered by air, though ground bursts also produce EMP effects over a localized area), it can produce damage to electronics over a wide, even continental, geographical area. Research has been done into the possibility of pure fusion bombs : nuclear weapons that consist of fusion reactions without requiring
2595-537: A new nuclear strategy, one that is distinct from that which gave relative stability during the Cold War. Since 1996, the United States has had a policy of allowing the targeting of its nuclear weapons at terrorists armed with weapons of mass destruction . Robert Gallucci argues that although traditional deterrence is not an effective approach toward terrorist groups bent on causing a nuclear catastrophe, Gallucci believes that "the United States should instead consider
2768-408: A nuclear fuel. India has 14 small nuclear power reactors in commercial operation, two larger ones under construction, and ten more planned. The 14 operating ones (2548 MWe total) comprise: The two under construction and two of the planned ones are 450 MWe versions of these 200 MWe domestic products. Construction has been seriously delayed by financial and technical problems. In 2001 a final agreement
2941-526: A nuclear power program have a dual-use capability, in that several stages of the nuclear fuel cycle allow diversion of nuclear materials for nuclear weapons. When this happens a nuclear power program can become a route leading to the atomic bomb or a public annex to a secret bomb program. The crisis over Iran's nuclear activities is a case in point. Many UN and US agencies warn that building more nuclear reactors unavoidably increases nuclear proliferation risks. A fundamental goal for American and global security
3114-425: A nuclear war between two nations would result in mutual annihilation. From this point of view, the significance of nuclear weapons is to deter war because any nuclear war would escalate out of mutual distrust and fear, resulting in mutually assured destruction . This threat of national, if not global, destruction has been a strong motivation for anti-nuclear weapons activism. Critics from the peace movement and within
3287-411: A nuclear weapon from another country by threatening nuclear retaliation is known as the strategy of nuclear deterrence . The goal in deterrence is to always maintain a second strike capability (the ability of a country to respond to a nuclear attack with one of its own) and potentially to strive for first strike status (the ability to destroy an enemy's nuclear forces before they could retaliate). During
3460-465: A nuclear weapon is a gravity bomb dropped from aircraft ; this was the method used by the United States against Japan in 1945. This method places few restrictions on the size of the weapon. It does, however, limit attack range, response time to an impending attack, and the number of weapons that a country can field at the same time. With miniaturization, nuclear bombs can be delivered by both strategic bombers and tactical fighter-bombers . This method
3633-409: A nuclear weapon to its target is an important factor affecting both nuclear weapon design and nuclear strategy . The design, development, and maintenance of delivery systems are among the most expensive parts of a nuclear weapons program; they account, for example, for 57% of the financial resources spent by the United States on nuclear weapons projects since 1940. The simplest method for delivering
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#17327662431643806-433: A nuclear weapon with suitable materials (such as cobalt or gold ) creates a weapon known as a salted bomb . This device can produce exceptionally large quantities of long-lived radioactive contamination . It has been conjectured that such a device could serve as a "doomsday weapon" because such a large quantity of radioactivities with half-lives of decades, lifted into the stratosphere where winds would distribute it around
3979-401: A party to the NPT, although North Korea acceded to the NPT in 1985, then withdrew in 2003 and conducted its first nuclear test in 2006. One critique of the NPT is that the treaty is discriminatory in the sense that only those countries that tested nuclear weapons before 1968 are recognized as nuclear weapon states while all other states are treated as non-nuclear-weapon states who can only join
4152-451: A phased withdrawal and verification for the destruction of all devices held by official and unofficial members of the nuclear club . The Global Zero campaign works toward building an international consensus and a sustained global movement of leaders and citizens for the elimination of nuclear weapons . Goals include the initiation of United States - Russia bilateral negotiations for reductions to 1,000 total warheads each and commitments from
4325-421: A policy of expanded deterrence, which focuses not solely on the would-be nuclear terrorists but on those states that may deliberately transfer or inadvertently leak nuclear weapons and materials to them. By threatening retaliation against those states, the United States may be able to deter that which it cannot physically prevent.". Graham Allison makes a similar case, arguing that the key to expanded deterrence
4498-558: A safeguards system as specified under Article III of the Nuclear Non-Proliferation Treaty (NPT) of 1968, which aims to ensure that civil stocks of uranium and plutonium, as well as facilities and technologies associated with these nuclear materials, are used only for peaceful purposes and do not contribute in any way to proliferation or nuclear weapons programs. It is often argued that the proliferation of nuclear weapons to many other states has been prevented by
4671-574: A second series of nuclear tests in 1998, Pakistan followed with a series of tests of its own. In 2006, North Korea conducted its first nuclear test . Early efforts to prevent nuclear proliferation involved intense government secrecy, the wartime acquisition of known uranium stores (the Combined Development Trust ), and at times even outright sabotage —such as the bombing of a heavy-water facility in Norway thought to be used for
4844-531: A set of export rules, to the IAEA in 1978. These were to ensure that transfers of nuclear material or equipment would not be diverted to unsafeguarded nuclear fuel cycle or nuclear explosive activities, and formal government assurances to this effect were required from recipients. The Guidelines also recognised the need for physical protection measures in the transfer of sensitive facilities, technology and weapons-usable materials, and strengthened retransfer provisions. The group began with seven members—the United States,
5017-447: A significant portion of their energy from fission reactions used to "trigger" fusion reactions, and fusion reactions can themselves trigger additional fission reactions. Only six countries—the United States , Russia , the United Kingdom , China , France , and India —have conducted thermonuclear weapon tests. Whether India has detonated a "true" multi-staged thermonuclear weapon is controversial. North Korea claims to have tested
5190-550: A substantial investment" in the past to develop pure fusion weapons, but that, "The U.S. does not have and is not developing a pure fusion weapon", and that, "No credible design for a pure fusion weapon resulted from the DOE investment". Nuclear isomers provide a possible pathway to fissionless fusion bombs. These are naturally occurring isotopes ( Hf being a prominent example) which exist in an elevated energy state. Mechanisms to release this energy as bursts of gamma radiation (as in
5363-774: A supplement to any existing comprehensive safeguards agreement. Weapons states have agreed to accept the principles of the model additional protocol. Key elements of the model Additional Protocol: As of 3 July 2015, 146 countries have signed the Additional Protocols and 126 have brought them into force. The IAEA is also applying the measures of the Additional Protocol in Taiwan. Under the Joint Comprehensive Plan of Action , Iran has agreed to implement its protocol provisionally. Among
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5536-439: A threat to nonproliferation and world peace . The precise use of terminology in the context of disarmament may have important implications for political Signaling theory . In the case of North Korea , "denuclearization" has historically been interpreted as different from "disarmament" by including withdrawal of American nuclear capabilities from the region. More recently, this term has become provocative due to its comparisons to
5709-483: A yield equivalent to 12,500 tonnes of TNT , the blast and thermal wave of the bomb destroyed nearly 50,000 buildings (including the headquarters of the 2nd General Army and Fifth Division ) and killed 70,000–80,000 people outright, with total deaths being around 90,000–146,000. Detonation of the " Fat Man " device exploded over the Japanese city of Nagasaki three days later on August 9, 1945, destroying 60% of
5882-480: Is a new danger, which cannot be addressed by deterrence: "The classical notion of deterrence was that there was some consequences before which aggressors and evildoers would recoil. In a world of suicide bombers, that calculation doesn't operate in any comparable way". George Shultz has said, "If you think of the people who are doing suicide attacks, and people like that get a nuclear weapon, they are almost by definition not deterrable". Andrew Bacevich wrote that there
6055-497: Is a potential nuclear arms stockpile replacement since the isotope naturally decays . In May 1995, NPT parties reaffirmed their commitment to a Fissile Materials Cut-off Treaty to prohibit the production of any further fissile material for weapons. This aims to complement the Comprehensive Nuclear-Test-Ban Treaty of 1996 (not entered into force as of June 2020) and to codify commitments made by
6228-509: Is a prime cause of bilateral tension, its sovereignty being in dispute since 1948 . There is a persistent low-level bilateral military conflict due to the alleged backing of insurgency by Pakistan in India, and the infiltration of Pakistani state-backed militants into the Indian state of Jammu and Kashmir , along with the disputed status of Kashmir . Both engaged in a conventional arms race in
6401-420: Is a thermonuclear weapon that yields a relatively small explosion but a relatively large amount of neutron radiation . Such a weapon could, according to tacticians, be used to cause massive biological casualties while leaving inanimate infrastructure mostly intact and creating minimal fallout. Because high energy neutrons are capable of penetrating dense matter, such as tank armor, neutron warheads were procured in
6574-456: Is analogous to identifying a criminal by fingerprints. "The goal would be twofold: first, to deter leaders of nuclear states from selling weapons to terrorists by holding them accountable for any use of their weapons; second, to give leaders every incentive to tightly secure their nuclear weapons and materials." According to the Pentagon's June 2019 " Doctrine for Joint Nuclear Operations " of
6747-403: Is coming up with ways of tracing nuclear material to the country that forged the fissile material. "After a nuclear bomb detonates, nuclear forensics cops would collect debris samples and send them to a laboratory for radiological analysis. By identifying unique attributes of the fissile material, including its impurities and contaminants, one could trace the path back to its origin." The process
6920-481: Is for the purpose of achieving different yields for different situations , and in manipulating design elements to attempt to minimize weapon size, radiation hardness or requirements for special materials, especially fissile fuel or tritium. Some nuclear weapons are designed for special purposes; most of these are for non-strategic (decisively war-winning) purposes and are referred to as tactical nuclear weapons . The neutron bomb purportedly conceived by Sam Cohen
7093-503: Is no evidence that it is feasible beyond the military domain. However, the U.S. Air Force funded studies of the physics of antimatter in the Cold War , and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. A fourth generation nuclear weapon design is related to, and relies upon, the same principle as antimatter-catalyzed nuclear pulse propulsion . Most variation in nuclear weapon design
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7266-506: Is no feasible scenario under which the US could sensibly use nuclear weapons: For the United States, they are becoming unnecessary, even as a deterrent. Certainly, they are unlikely to dissuade the adversaries most likely to employ such weapons against us -- Islamic extremists intent on acquiring their own nuclear capability. If anything, the opposite is true. By retaining a strategic arsenal in readiness (and by insisting without qualification that
7439-409: Is not a fusion bomb. In the boosted bomb, the neutrons produced by the fusion reactions serve primarily to increase the efficiency of the fission bomb. There are two types of boosted fission bomb: internally boosted, in which a deuterium-tritium mixture is injected into the bomb core, and externally boosted, in which concentric shells of lithium-deuteride and depleted uranium are layered on the outside of
7612-430: Is not accurate. Both Canada (by supplying the 40 MW research reactor) and the United States (by supplying 21 tons of heavy water) supplied India with the technology necessary to create a nuclear weapons program, dubbed CIRUS (Canada-India Reactor, United States). Canada sold India the reactor on the condition that the reactor and any by-products would be "employed for peaceful purposes only." Archived 27 September 2007 at
7785-427: Is not classified as a "special nuclear material" but rather as a by-product. It is seen as an important litmus test on the seriousness of the United States' intention to nuclear disarm . This radioactive, super-heavy, hydrogen isotope is used to boost the efficiency of fissile materials in nuclear weapons. The United States resumed tritium production in 2003 for the first time in 15 years. This could indicate that there
7958-490: Is not clear that this has ever been implemented, and their plausible use in nuclear weapons is a matter of dispute. The other basic type of nuclear weapon produces a large proportion of its energy in nuclear fusion reactions. Such fusion weapons are generally referred to as thermonuclear weapons or more colloquially as hydrogen bombs (abbreviated as H-bombs ), as they rely on fusion reactions between isotopes of hydrogen ( deuterium and tritium ). All such weapons derive
8131-432: Is tempting and easy to say we can't get there from here, [...] we must chart a course toward that goal." During his presidential campaign, former U.S. President Barack Obama pledged to "set a goal of a world without nuclear weapons, and pursue it." The United States has taken the lead in ensuring that nuclear materials globally are properly safeguarded. A popular program that has received bipartisan domestic support for over
8304-438: Is the growth and modernization of China's nuclear arsenal and its assistance with Pakistan's nuclear power programme and, reportedly, with missile technology, which exacerbate Indian concerns. In particular, as viewed by Indian strategists, Pakistan is aided by China's People's Liberation Army . Nuclear power for civil use is well established in India . Its civil nuclear strategy has been directed towards complete independence in
8477-454: Is the primary means of nuclear weapons delivery; the majority of U.S. nuclear warheads, for example, are free-fall gravity bombs, namely the B61 , which is being improved upon to this day. Preferable from a strategic point of view is a nuclear weapon mounted on a missile , which can use a ballistic trajectory to deliver the warhead over the horizon. Although even short-range missiles allow for
8650-574: Is the spread of nuclear weapons , fissionable material, and weapons-applicable nuclear technology and information to nations not recognized as " Nuclear Weapon States " by the Treaty on the Non-Proliferation of Nuclear Weapons , commonly known as the Non-Proliferation Treaty or NPT . Proliferation has been opposed by many nations with and without nuclear weapons, as governments fear that more countries with nuclear weapons will increase
8823-587: Is to minimize the proliferation risks associated with the expansion of nuclear power. If this development is "poorly managed or efforts to contain risks are unsuccessful, the nuclear future will be dangerous". For nuclear power programs to be developed and managed safely and securely, it is important that countries have domestic “ good governance ” characteristics that will encourage proper nuclear operations and management: These characteristics include low degrees of corruption (to avoid officials selling materials and technology for their own personal gain as occurred with
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#17327662431648996-566: The A.Q. Khan smuggling network in Pakistan), high degrees of political stability (defined by the World Bank as "likelihood that the government will be destabilized or overthrown by unconstitutional or violent means, including politically-motivated violence and terrorism"), high governmental effectiveness scores (a World Bank aggregate measure of "the quality of the civil service and the degree of its independence from political pressures [and]
9169-679: The Baruch Plan of 1946, named after Bernard Baruch , America's first representative to the United Nations Atomic Energy Commission (UNAEC). The Baruch Plan , which drew heavily from the Acheson–Lilienthal Report of 1946, proposed the verifiable dismantlement and destruction of the U.S. nuclear arsenal (which, at that time, was the only nuclear arsenal in the world) after all governments had cooperated successfully to accomplish two things: (1)
9342-881: The Campaign for Nuclear Disarmament , Peace Action , Pugwash Conferences on Science and World Affairs , Greenpeace , Soka Gakkai International , International Physicians for the Prevention of Nuclear War , Mayors for Peace , Global Zero , the International Campaign to Abolish Nuclear Weapons , and the Nuclear Age Peace Foundation . There have been many large anti-nuclear demonstrations and protests . On June 12, 1982, one million people demonstrated in New York City's Central Park against nuclear weapons and for an end to
9515-542: The Cold War arms race . It was the largest anti-nuclear protest and the largest political demonstration in American history. In recent years, some U.S. elder statesmen have also advocated nuclear disarmament. Sam Nunn , William Perry , Henry Kissinger , and George Shultz have called upon governments to embrace the vision of a world free of nuclear weapons, and in various op-ed columns have proposed an ambitious program of urgent steps to that end. The four have created
9688-487: The Dalai Lama ". Others have argued that nuclear weapons have made the world relatively safer, with peace through deterrence and through the stability–instability paradox , including in south Asia. Kenneth Waltz has argued that nuclear weapons have created a nuclear peace , and further nuclear weapon proliferation might even help avoid the large scale conventional wars that were so common prior to their invention at
9861-676: The Eighteen Nation Disarmament Committee (ENDC) finished negotiations on the text of the NPT. In June 1968, the U.N. General Assembly endorsed the NPT with General Assembly Resolution 2373 (XXII), and in July 1968, the NPT opened for signature in Washington, D.C. , London and Moscow . The NPT entered into force in March 1970. Since the mid-1970s, the primary focus of non-proliferation efforts has been to maintain, and even increase, international control over
10034-497: The European Commission . Its goal is to "[..] provide competitive, commercially-based services as an alternative to a state’s development of costly, proliferation-sensitive facilities, and address other issues associated with the safe and secure management of used fuel and radioactive waste ." According to Kenneth D. Bergeron's Tritium on Ice: The Dangerous New Alliance of Nuclear Weapons and Nuclear Power , tritium
10207-718: The Great Peace March for Global Nuclear Disarmament . There were many Nevada Desert Experience protests and peace camps at the Nevada Test Site during the 1980s and 1990s. On May 1, 2005, 40,000 anti-nuclear/anti-war protesters marched past the United Nations in New York, 60 years after the atomic bombings of Hiroshima and Nagasaki . In 2008, 2009, and 2010, there have been protests about, and campaigns against, several new nuclear reactor proposals in
10380-611: The International Campaign to Abolish Nuclear Weapons was awarded the Nobel Peace Prize "for its work to draw attention to the catastrophic humanitarian consequences of any use of nuclear weapons and for its ground-breaking efforts to achieve a treaty-based prohibition of such weapons". One of the earliest peace organisations to emerge after the Second World War was the World Peace Council , which
10553-624: The Nuclear Security Project to advance this agenda. Organisations such as Global Zero , an international non-partisan group of 300 world leaders dedicated to eliminating all nuclear weapons, have also been established. In 1945 in the New Mexico desert, American scientists conducted " Trinity ", the first nuclear weapons test , marking the beginning of the atomic age . Even before the Trinity test, national leaders debated
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#173276624316410726-524: The People's Republic of China , an acknowledged nuclear weapons state. Both countries are opposed to the NPT as it stands, and India has consistently attacked the Treaty since its inception in 1970 labeling it as a lopsided treaty in favor of the nuclear powers. Relations between the two countries are tense and hostile, and the risks of nuclear conflict between them have long been considered quite high. Kashmir
10899-695: The Starfish Prime high-altitude nuclear test in 1962, an unexpected effect was produced which is called a nuclear electromagnetic pulse . This is an intense flash of electromagnetic energy produced by a rain of high-energy electrons which in turn are produced by a nuclear bomb's gamma rays. This flash of energy can permanently destroy or disrupt electronic equipment if insufficiently shielded. It has been proposed to use this effect to disable an enemy's military and civilian infrastructure as an adjunct to other nuclear or conventional military operations. By itself it could as well be useful to terrorists for crippling
11072-554: The Tsar Bomba (see TNT equivalent ). A thermonuclear weapon weighing as little as 600 pounds (270 kg) can release energy equal to more than 1.2 megatonnes of TNT (5.0 PJ). A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation . Since they are weapons of mass destruction , the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed twice in war , both by
11245-676: The Tsar Bomba of the USSR, which released an energy equivalent of over 50 megatons of TNT (210 PJ), was a three-stage weapon. Most thermonuclear weapons are considerably smaller than this, due to practical constraints from missile warhead space and weight requirements. In the early 1950s the Livermore Laboratory in the United States had plans for the testing of two massive bombs, Gnomon and Sundial , 1 gigaton of TNT and 10 gigatons of TNT respectively. Fusion reactions do not create fission products, and thus contribute far less to
11418-503: The U.N. General Assembly . Eisenhower's proposal led eventually to the creation of the International Atomic Energy Agency (IAEA) in 1957. Under the "Atoms for Peace" program thousands of scientists from around the world were educated in nuclear science and then dispatched home, where many later pursued secret weapons programs in their home country. Efforts to conclude an international agreement to limit
11591-512: The UK , and the United States . Notable non-signatories to the NPT are Israel, Pakistan, and India (the latter two have since tested nuclear weapons, while Israel is considered by most to be an unacknowledged nuclear weapons state). North Korea was once a signatory but withdrew in January 2003. The legality of North Korea's withdrawal is debatable but as of 9 October 2006, North Korea clearly possesses
11764-477: The United Nations with the petition signed by more than 11,000 scientists calling for an end to nuclear-weapon testing . The " Baby Tooth Survey ", headed by Louise Reiss , demonstrated conclusively in 1961 that above-ground nuclear testing posed significant public health risks in the form of radioactive fallout spread primarily via milk from cows that had ingested contaminated grass. Public pressure and
11937-698: The United Nations Secretary-General Kofi Annan 's plan to reform the UN as presented in his report to the General Assembly in July 1997. Its goal is to promote nuclear disarmament and non-proliferation and the strengthening of the disarmament regimes in respect to other weapons of mass destruction , chemical and biological weapons . It also promotes disarmament efforts in the area of conventional weapons , especially land mines and small arms , which are often
12110-679: The United States–Russia Strategic Stability Dialogue (SSD) in 2021 under president Joe Biden . When the extreme danger intrinsic to nuclear war and the possession of nuclear weapons became apparent to all sides during the Cold War, a series of disarmament and nonproliferation treaties were agreed upon between the United States, the Soviet Union, and several other states throughout the world. Many of these treaties involved years of negotiations, and seemed to result in important steps in arms reductions and reducing
12283-660: The Wayback Machine . Similarly, the United States sold India heavy water for use in the reactor "only... in connection with research into and the use of atomic energy for peaceful purposes" Archived 27 September 2007 at the Wayback Machine . India, in violation of these agreements, used the Canadian-supplied reactor and American-supplied heavy water to produce plutonium for their first nuclear explosion, Smiling Buddha . The Indian government controversially justified this, however, by claiming that Smiling Buddha
12456-590: The White House Peace Vigil in Washington, D.C. He was later joined on the vigil by anti-nuclear activists Concepcion Picciotto and Ellen Benjamin . On June 12, 1982, one million people demonstrated in New York City's Central Park against nuclear weapons and for an end to the cold war arms race . It was the largest anti-nuclear protest and the largest political demonstration in American history. International Day of Nuclear Disarmament protests were held on June 20, 1983, at 50 sites across
12629-459: The collapse of the Gaddafi regime after disarmament. The Biden administration has been criticized for its reaffirming of a strategy of denuclearization with Korea and Japan, as opposed to a "freeze" or "pause" on new nuclear developments. Similarly, the term "irreversible" has been argued to set an impossible standard for states to disarm. Eliminating nuclear weapons has long been an aim of
12802-491: The fissile material and specialized technologies necessary to build such devices because these are the most difficult and expensive parts of a nuclear weapons program. The main materials whose generation and distribution are controlled are highly enriched uranium and plutonium . Other than the acquisition of these special materials, the scientific and technical means for weapons construction to develop rudimentary, but working, nuclear explosive devices are considered to be within
12975-424: The hafnium controversy ) have been proposed as possible triggers for conventional thermonuclear reactions. Antimatter , which consists of particles resembling ordinary matter particles in most of their properties but having opposite electric charge , has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there
13148-553: The head of government or head of state . Despite controls and regulations governing nuclear weapons, there is an inherent danger of "accidents, mistakes, false alarms, blackmail, theft, and sabotage". In the late 1940s, lack of mutual trust prevented the United States and the Soviet Union from making progress on arms control agreements. The Russell–Einstein Manifesto was issued in London on July 9, 1955, by Bertrand Russell in
13321-431: The southern part of the country . At the moment, India has a small fast breeder reactor and is planning a much larger one ( Prototype Fast Breeder Reactor ). This self-sufficiency extends from uranium exploration and mining through fuel fabrication, heavy water production, reactor design and construction, to reprocessing and waste management. It is also developing technology to utilise its abundant resources of thorium as
13494-436: The tropopause into the stratosphere , where the calm non-turbulent winds permit the debris to travel great distances from the burst, eventually settling and unpredictably contaminating areas far removed from the target of the explosion. There are other types of nuclear weapons as well. For example, a boosted fission weapon is a fission bomb that increases its explosive yield through a small number of fusion reactions, but it
13667-537: The "implosion" method, is more sophisticated and more efficient (smaller, less massive, and requiring less of the expensive fissile fuel) than the former. A major challenge in all nuclear weapon designs is to ensure that a significant fraction of the fuel is consumed before the weapon destroys itself. The amount of energy released by fission bombs can range from the equivalent of just under a ton to upwards of 500,000 tons (500 kilotons ) of TNT (4.2 to 2.1 × 10 GJ). All fission reactions generate fission products ,
13840-586: The 1980s (though not deployed in Europe) for use as tactical payloads for US Army artillery shells (200 mm W79 and 155 mm W82 ) and short range missile forces. Soviet authorities announced similar intentions for neutron warhead deployment in Europe; indeed, they claimed to have originally invented the neutron bomb, but their deployment on USSR tactical nuclear forces is unverifiable. A type of nuclear explosive most suitable for use by ground special forces
14013-410: The 1980s, including sophisticated technology and equipment capable of delivering nuclear weapons. In the 1990s the arms race quickened. In 1994 India reversed a four-year trend of reduced allocations for defence, and despite its much smaller economy, Pakistan was expected to push its own expenditures yet higher. Both have lost their patrons: India, the former USSR, and Pakistan, the United States. But it
14186-442: The Cold War performed this task with less success than we know, they performed with more success than we should have reasonably predicted. The problems identified in this book were not the product of incompetent organizations. They reflect the inherent limits of organizational safety . Recognizing that simple truth is the first and most important step toward a safer future. Nuclear proliferation Nuclear proliferation
14359-425: The Cold War, policy and military theorists considered the sorts of policies that might prevent a nuclear attack, and they developed game theory models that could lead to stable deterrence conditions. Different forms of nuclear weapons delivery (see above) allow for different types of nuclear strategies. The goals of any strategy are generally to make it difficult for an enemy to launch a pre-emptive strike against
14532-565: The IAEA reports to both the United Nations General Assembly and the Security Council . The IAEA regularly inspects civil nuclear facilities to verify the accuracy of documentation supplied to it. The agency checks inventories, and samples and analyzes materials. Safeguards are designed to deter a diversion of nuclear material by increasing the risk of early detection. They are complemented by controls on
14705-494: The Joint Chiefs of Staffs website Publication, "Integration of nuclear weapons employment with conventional and special operations forces is essential to the success of any mission or operation." Because they are weapons of mass destruction, the proliferation and possible use of nuclear weapons are important issues in international relations and diplomacy. In most countries, the use of nuclear force can only be authorized by
14878-565: The NPT and which have significant unsafeguarded nuclear activities; India, Pakistan, and Israel fall within this category. While safeguards apply to some of their activities, others remain beyond scrutiny. A further concern is that countries may develop various sensitive nuclear fuel cycle facilities and research reactors under full safeguards and then subsequently opt out of the NPT. Bilateral agreements, such as insisted upon by Australia and Canada for sale of uranium , address this by including fallback provisions, but many countries are outside
15051-452: The NPT regime lay in the fact that no obvious diversion of material was involved. The uranium used as fuel probably came from indigenous sources, and the nuclear facilities were built by the countries themselves without being declared or placed under safeguards. Iraq, as an NPT party, was obliged to declare all facilities but did not do so. Nevertheless, the activities were detected and brought under control using international diplomacy. In Iraq,
15224-406: The NPT, and a 100 MW indigenous unit in operation since 1985. Both use local uranium, as India does not import any nuclear fuel. It is estimated that India may have built up enough weapons-grade plutonium for a hundred nuclear warheads. It is widely believed that the nuclear programs of India and Pakistan used Canadian CANDU reactors to produce fissionable materials for their weapons; however, this
15397-503: The Nuclear Age (1961) that mere possession of a nuclear arsenal was enough to ensure deterrence, and thus concluded that the spread of nuclear weapons could increase international stability . Some prominent neo-realist scholars, such as Kenneth Waltz and John Mearsheimer , have argued, along the lines of Gallois, that some forms of nuclear proliferation would decrease the likelihood of total war , especially in troubled regions of
15570-563: The Nuclear Security Project to advance this agenda. Nunn reinforced that agenda during a speech at the Harvard Kennedy School on October 21, 2008, saying, "I'm much more concerned about a terrorist without a return address that cannot be deterred than I am about deliberate war between nuclear powers. You can't deter a group who is willing to commit suicide. We are in a different era. You have to understand
15743-592: The Soviet Union had not yet developed it. In 1950, the WPC launched its Stockholm Appeal calling for the absolute prohibition of nuclear weapons. The campaign won support, collecting, it is said, 560 million signatures in Europe, most from socialist countries, including 10 million in France (including that of the young Jacques Chirac ), and 155 million signatures in the Soviet Union – the entire adult population. Several non-aligned peace groups who had distanced themselves from
15916-501: The Soviet point of view. At first there was limited co-operation between such groups and the WPC, but western delegates who tried to criticize the Soviet Union or the WPC's silence about Russian armaments were often shouted down at WPC conferences and by the early 1960s they had dissociated themselves from the WPC. After the 1986 Reykjavík Summit between U.S. President Ronald Reagan and the new Soviet General Secretary Mikhail Gorbachev ,
16089-553: The UN General Assembly stated that use of nuclear weaponry "would exceed even the scope of war and cause indiscriminate suffering and destruction to mankind and civilization and, as such, is contrary to the rules of international law and to the laws of humanity". The UN Office for Disarmament Affairs (UNODA) is a department of the United Nations Secretariat established in January 1998 as part of
16262-629: The UN Security Council veto. This soon led to deadlock in the UNAEC. Operation Crossroads was a series of nuclear weapon tests conducted by the United States at Bikini Atoll in the Pacific Ocean in the summer of 1946. Its purpose was to test the effect of nuclear weapons on naval ships. Pressure to cancel Operation Crossroads came from scientists and diplomats. Manhattan Project scientists argued that further nuclear testing
16435-608: The USAAF detonated a plutonium implosion-type fission bomb nicknamed " Fat Man " over the Japanese city of Nagasaki . These bombings caused injuries that resulted in the deaths of approximately 200,000 civilians and military personnel . The ethics of these bombings and their role in Japan's surrender are to this day, still subjects of debate . Since the atomic bombings of Hiroshima and Nagasaki , nuclear weapons have been detonated over 2,000 times for testing and demonstration. Only
16608-777: The USAF AIR-2 Genie , the AIM-26 Falcon and US Army Nike Hercules . Missile interceptors such as the Sprint and the Spartan also used small nuclear warheads (optimized to produce neutron or X-ray flux) but were for use against enemy strategic warheads. Other small, or tactical, nuclear weapons were deployed by naval forces for use primarily as antisubmarine weapons. These included nuclear depth bombs or nuclear armed torpedoes. Nuclear mines for use on land or at sea are also possibilities. The system used to deliver
16781-736: The United Kingdom, the first Aldermaston March organised by the Direct Action Committee and supported by the Campaign for Nuclear Disarmament took place on Easter 1958, when several thousand people marched for four days from Trafalgar Square , London, to the Atomic Weapons Research Establishment close to Aldermaston in Berkshire , England, to demonstrate their opposition to nuclear weapons. CND organised Aldermaston marches into
16954-527: The United States against the Japanese cities of Hiroshima and Nagasaki in 1945 during World War II . Nuclear weapons have only twice been used in warfare, both times by the United States against Japan at the end of World War II . On August 6, 1945, the United States Army Air Forces (USAAF) detonated a uranium gun-type fission bomb nicknamed " Little Boy " over the Japanese city of Hiroshima ; three days later, on August 9,
17127-749: The United States and the Soviet Union concluded two important nuclear arms reduction treaties: the INF Treaty (1987) and START I (1991). After the end of the Cold War, the United States and the Russian Federation concluded the Strategic Offensive Reductions Treaty (2003) and the New START Treaty (2010). The US withdrew from the INF Treaty in 2019 under president Donald Trump , and launched
17300-406: The United States rededicate itself to the goal of eliminating nuclear weapons, concluding: "We endorse setting the goal of a world free of nuclear weapons and working energetically on the actions required to achieve that goal." Arguing a year later that "with nuclear weapons more widely available, deterrence is decreasingly effective and increasingly hazardous," the authors concluded that although "it
17473-450: The United States, the UK, France and Russia to cease production of weapons material, as well as putting a similar ban on China. This treaty will also put more pressure on Israel, India and Pakistan to agree to international verification. On 9 August 2005, Ayatollah Ali Khamenei issued a fatwa forbidding the production, stockpiling and use of nuclear weapons . Khamenei's official statement
17646-502: The United States. Key programs: List of countries' nuclear weapons development status represented by color. While the vast majority of states have adhered to the stipulations of the Nuclear Nonproliferation Treaty, a few states have either refused to sign the treaty or have pursued nuclear weapons programs while not being members of the treaty. Many view the pursuit of nuclear weapons by these states as
17819-566: The United States. There is an annual protest against U.S. nuclear weapons research at Lawrence Livermore National Laboratory in California and in the 2007 protest, 64 people were arrested. There have been a series of protests at the Nevada Test Site and in the April 2007 Nevada Desert Experience protest, 39 people were cited by police. There have been anti-nuclear protests at Naval Base Kitsap for many years, and several in 2008. In 2017,
17992-614: The United States. Large demonstrations and the disruption of US naval visits led the New Zealand government to ban nuclear-armed and powered ships from entering the country's territorial waters in 1984. Hundreds of thousands of people took part in Palm Sunday and other demonstrations for peace and nuclear disarmament in Australia during the mid-1980s. In 1986, hundreds of people walked from Los Angeles to Washington, D.C. in
18165-526: The United States. Small, two-man portable tactical weapons (somewhat misleadingly referred to as suitcase bombs ), such as the Special Atomic Demolition Munition , have been developed, although the difficulty of combining sufficient yield with portability limits their military utility. Nuclear warfare strategy is a set of policies that deal with preventing or fighting a nuclear war. The policy of trying to prevent an attack by
18338-496: The WPC advised their supporters not to sign the Appeal. The WPC had uneasy relations with the non-aligned peace movement and has been described as being caught in contradictions as "it sought to become a broad world movement while being instrumentalized increasingly to serve foreign policy in the Soviet Union and nominally socialist countries." From the 1950s until the late 1980s it tried to use non-aligned peace organizations to spread
18511-507: The atomic bomb "encapsulated the very worst direction in which society was moving". Peace movements emerged in Japan and in 1954 they converged to form a unified "Japanese Council Against Atomic and Hydrogen Bombs". Japanese opposition to the Pacific nuclear weapons tests was widespread, and "an estimated 35 million signatures were collected on petitions calling for bans on nuclear weapons". In
18684-512: The author of Atomic Obsession , has also dismissed the need to interfere with Iran's nuclear program and expressed that arms control measures are counterproductive. During a 2010 lecture at the University of Missouri , which was broadcast by C-SPAN , Mueller has also argued that the threat from nuclear weapons, especially nuclear terrorism , has been exaggerated, both in the popular media and by officials. Former Secretary Kissinger says there
18857-406: The capability to make a nuclear explosive device. The IAEA was established on 29 July 1957 to help nations develop nuclear energy for peaceful purposes. Allied to this role is the administration of safeguards arrangements to provide assurance to the international community that individual countries are honoring their commitments under the treaty. Though established under its own international treaty,
19030-485: The chance of a successful missile defense . Today, missiles are most common among systems designed for delivery of nuclear weapons. Making a warhead small enough to fit onto a missile, though, can be difficult. Tactical weapons have involved the most variety of delivery types, including not only gravity bombs and missiles but also artillery shells, land mines , and nuclear depth charges and torpedoes for anti-submarine warfare . An atomic mortar has been tested by
19203-590: The city and killing 35,000–40,000 people outright, though up to 40,000 additional deaths may have occurred over some time after that. Subsequently, the world's nuclear weapons stockpiles grew. In 1946 the Truman administration commissioned the Acheson-Lilienthal Report , which proposed the international control of the nuclear fuel cycle , revealing atomic energy technology to the USSR, and the decommissioning of all existing nuclear weapons through
19376-464: The correctness of formal declarations by suspect states, in the 1990s attention turned to what might not have been declared. While accepting safeguards at declared facilities, Iraq had set up elaborate equipment elsewhere in an attempt to enrich uranium to weapons-grade. North Korea attempted to use research reactors (not commercial electricity-generating reactors) and a nuclear reprocessing plant to produce some weapons-grade plutonium . The weakness of
19549-435: The creation of nuclear fallout than fission reactions, but because all thermonuclear weapons contain at least one fission stage, and many high-yield thermonuclear devices have a final fission stage, thermonuclear weapons can generate at least as much nuclear fallout as fission-only weapons. Furthermore, high yield thermonuclear explosions (most dangerously ground bursts) have the force to lift radioactive debris upwards past
19722-455: The decision process. The prospect of mutually assured destruction might not deter an enemy who expects to die in the confrontation. Further, if the initial act is from a stateless terrorist instead of a sovereign nation, there might not be a nation or specific target to retaliate against. It has been argued, especially after the September 11, 2001, attacks , that this complication calls for
19895-413: The destruction of nuclear weapons invoked basic moral and religious intuitions. In one part of his address to the UN, Baruch said, "Behind the black portent of the new atomic age lies a hope which, seized upon with faith, can work out our salvation. If we fail, then we have damned every man to be the slave of Fear. Let us not deceive ourselves. We must elect World Peace or World Destruction.... We must answer
20068-441: The dropping of atomic bombs on two Japanese cities in 1945 was justified), the United States continues tacitly to sustain the view that nuclear weapons play a legitimate role in international politics ... . In The Limits of Safety , Scott Sagan documented numerous incidents in US military history that could have produced a nuclear war by accident. He concluded: while the military organizations controlling U.S. nuclear forces during
20241-592: The early 2000s, the George W. Bush administration repeatedly pushed to fund policies that would allegedly make nuclear weapons more usable in the post–Cold War environment. To date the U.S. Congress has refused to fund many of these policies. However, some feel that even considering such programs harms the credibility of the United States as a proponent of nonproliferation. Former U.S. officials Henry Kissinger, George Shultz, Bill Perry, and Sam Nunn (aka 'The Gang of Four' on nuclear deterrence) proposed in January 2007 that
20414-513: The end of World War II . In the July 2012 issue of Foreign Affairs Waltz took issue with the view of most U.S., European, and Israeli, commentators and policymakers that a nuclear-armed Iran would be unacceptable. Instead Waltz argues that it would probably be the best possible outcome, as it would restore stability to the Middle East by balancing Israel's regional monopoly on nuclear weapons . Professor John Mueller of Ohio State University ,
20587-469: The energy of a fission bomb to compress and heat fusion fuel. In the Teller-Ulam design , which accounts for all multi-megaton yield hydrogen bombs, this is accomplished by placing a fission bomb and fusion fuel ( tritium , deuterium , or lithium deuteride ) in proximity within a special, radiation-reflecting container. When the fission bomb is detonated, gamma rays and X-rays emitted first compress
20760-426: The establishment of an "international atomic development authority," which would actually own and control all military-applicable nuclear materials and activities, and (2) the creation of a system of automatic sanctions, which not even the U.N. Security Council could veto, and which would proportionately punish states attempting to acquire the capability to make nuclear weapons or fissile material . Baruch's plea for
20933-541: The export of sensitive technology from countries such as the UK and the United States through voluntary bodies such as the Nuclear Suppliers Group . The main concern of the IAEA is that uranium not be enriched beyond what is necessary for commercial civil plants, and that plutonium which is produced by nuclear reactors not be refined into a form that would be suitable for bomb production. Traditional safeguards are arrangements to account for and control
21106-409: The extension of assurances and mutual defence treaties to these states by nuclear powers, but other factors, such as national prestige, or specific historical experiences, also play a part in hastening or stopping nuclear proliferation. Dual-use technology refers to the possibility of military use of civilian nuclear power technology. Many technologies and materials associated with the creation of
21279-455: The fission bomb core. The external method of boosting enabled the USSR to field the first partially thermonuclear weapons, but it is now obsolete because it demands a spherical bomb geometry, which was adequate during the 1950s arms race when bomber aircraft were the only available delivery vehicles. The detonation of any nuclear weapon is accompanied by a blast of neutron radiation . Surrounding
21452-580: The former USSR, the United Kingdom, France, Germany, Canada and Japan—but now includes 46 countries including all five nuclear weapons states . The International Framework for Nuclear Energy Cooperation is an international project involving 25 partner countries, 28 observer and candidate partner countries, and the International Atomic Energy Agency, the Generation IV International Forum, and
21625-420: The fusion fuel, then heat it to thermonuclear temperatures. The ensuing fusion reaction creates enormous numbers of high-speed neutrons , which can then induce fission in materials not normally prone to it, such as depleted uranium . Each of these components is known as a "stage", with the fission bomb as the "primary" and the fusion capsule as the "secondary". In large, megaton-range hydrogen bombs, about half of
21798-535: The globe, would make all life on the planet extinct. In connection with the Strategic Defense Initiative , research into the nuclear pumped laser was conducted under the DOD program Project Excalibur but this did not result in a working weapon. The concept involves the tapping of the energy of an exploding nuclear bomb to power a single-shot laser that is directed at a distant target. During
21971-620: The impact of nuclear weapons on domestic and foreign policy. Also involved in the debate about nuclear weapons policy was the scientific community, through professional associations such as the Federation of Atomic Scientists and the Pugwash Conference on Science and World Affairs . On August 6, 1945, towards the end of World War II , the " Little Boy " device was detonated over the Japanese city of Hiroshima . Exploding with
22144-477: The international non-proliferation regime. They possess or are quickly capable of assembling one or more nuclear weapons. They have remained outside the 1970 NPT. They are thus largely excluded from trade in nuclear plants or materials, except for safety-related devices for a few safeguarded facilities. In May 1998 India and Pakistan each exploded several nuclear devices underground. This heightened concerns regarding an arms race between them, with Pakistan involving
22317-408: The late 1960s when tens of thousands of people took part in the four-day events. On November 1, 1961, at the height of the Cold War , about 50,000 women brought together by Women Strike for Peace marched in 60 cities in the United States to demonstrate against nuclear weapons . It was the largest national women's peace protest of the 20th century. In 1958, Linus Pauling and his wife presented
22490-410: The leading countries that have not signed the Additional Protocol are Egypt, which says it will not sign until Israel accepts comprehensive IAEA safeguards, and Brazil, which opposes making the protocol a requirement for international cooperation on enrichment and reprocessing, but has not ruled out signing. The greatest risk from nuclear weapons proliferation comes from countries that have not joined
22663-433: The light of the weapons build-up and statements of US President Ronald Reagan . Reagan had "a world free of nuclear weapons" as his personal mission, and was largely scorned for this in Europe. Reagan was able to start discussions on nuclear disarmament with Soviet Union . He changed the name "SALT" ( Strategic Arms Limitation Talks ) to "START" ( Strategic Arms Reduction Talks ). On June 3, 1981, William Thomas launched
22836-496: The majority of their energy from nuclear fission reactions alone, and those that use fission reactions to begin nuclear fusion reactions that produce a large amount of the total energy output. All existing nuclear weapons derive some of their explosive energy from nuclear fission reactions. Weapons whose explosive output is exclusively from fission reactions are commonly referred to as atomic bombs or atom bombs (abbreviated as A-bombs ). This has long been noted as something of
23009-407: The midst of the Cold War. It highlighted the dangers posed by nuclear weapons and called for world leaders to seek peaceful resolutions to international conflict. The signatories included eleven pre-eminent intellectuals and scientists, including Albert Einstein , who signed it just days before his death on April 18, 1955. A few days after the release, philanthropist Cyrus S. Eaton offered to sponsor
23182-545: The military establishment have questioned the usefulness of such weapons in the current military climate. According to an advisory opinion issued by the International Court of Justice in 1996, the use of (or threat of use of) such weapons would generally be contrary to the rules of international law applicable in armed conflict, but the court did not reach an opinion as to whether or not the threat or use would be lawful in specific extreme circumstances such as if
23355-408: The missiles before they land or implementing civil defense measures using early-warning systems to evacuate citizens to safe areas before an attack. Weapons designed to threaten large populations or to deter attacks are known as strategic weapons . Nuclear weapons for use on a battlefield in military situations are called tactical weapons . Critics of nuclear war strategy often suggest that
23528-487: The new United Nations (UN) system, via the United Nations Atomic Energy Commission (UNAEC). With key modifications, the report became US policy in the form of the Baruch Plan , which was presented to the UNAEC during its first meeting in June 1946. As Cold War tensions emerged, it became clear that Stalin wanted to develop his own atomic bomb and that the United States insisted on an enforcement regime that would have overridden
23701-512: The non-NPT states (India, Pakistan and Israel), facility-specific safeguards apply. IAEA inspectors regularly visit these facilities to verify completeness and accuracy of records. The terms of the NPT cannot be enforced by the IAEA itself, nor can nations be forced to sign the treaty. In reality, as shown in Iraq and North Korea , safeguards can be backed up by diplomatic, political and economic measures. While traditional safeguards easily verified
23874-452: The nuclear fuel cycle, necessary because of its outspoken rejection of the NPT. Due to economic and technological isolation of India after the nuclear tests in 1974, India has largely diverted focus on developing and perfecting the fast breeder technology by intensive materials and fuel cycle research at the dedicated center established for research into fast reactor technology, Indira Gandhi Center for Atomic Research (IGCAR) at Kalpakkam , in
24047-401: The nuclear material being audited. Inspections by the IAEA are complemented by other measures such as surveillance cameras and instrumentation. The inspections act as an alert system providing a warning of the possible diversion of nuclear material from peaceful activities. The system relies on; All NPT non-weapons states must accept these full-scope safeguards. In the five weapons states plus
24220-515: The other key nuclear weapons countries to participate in multilateral negotiations for phased reductions of nuclear arsenals. Global Zero works to expand the diplomatic dialogue with key governments and continue to develop policy proposals on the critical issues related to the elimination of nuclear weapons. The International Conference on Nuclear Disarmament took place in Oslo in February 2008, and
24393-499: The pacifist left. But now many mainstream politicians, academic analysts, and retired military leaders also advocate nuclear disarmament. Sam Nunn , William Perry , Henry Kissinger , and George Shultz have called upon governments to embrace the vision of a world free of nuclear weapons, and in three op-eds in The Wall Street Journal proposed an ambitious program of urgent steps to that end. The four have created
24566-527: The pivot of the entire activity of the Communist Parties", and most western Communist parties followed this policy. Lawrence Wittner , a historian of the post-war peace movement, argues that the Soviet Union devoted great efforts to the promotion of the WPC in the early post-war years because it feared an American attack and American superiority of arms at a time when the USA possessed the atom bomb but
24739-450: The possibility of nuclear warfare (up to and including the so-called countervalue targeting of civilians with nuclear weapons), de-stabilize international or regional relations, or infringe upon the national sovereignty of nation states . Four countries besides the five recognized Nuclear Weapon States have acquired, or are presumed to have acquired, nuclear weapons: India , Pakistan , North Korea , and Israel . None of these four are
24912-523: The previous year. As reported by the UN Press, "On the one hand, we saw record levels of military spending and division within important arms-control frameworks, including the Treaty on the Non-Proliferation of Nuclear Weapons. On the other hand, we also saw the first-ever Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons" Despite a general trend toward disarmament in
25085-622: The quality of policy formulation and implementation"), and a strong degree of regulatory competence. At present, 189 countries are States Parties to the Treaty on the Nonproliferation of Nuclear Weapons , more commonly known as the Nuclear Non-Proliferation Treaty or NPT. These include the five Nuclear Weapons States (NWS) recognized by the NPT: the People's Republic of China , France , Russian Federation ,
25258-542: The reach of industrialized nations. Since its founding by the United Nations in 1957, the International Atomic Energy Agency (IAEA) has promoted two, sometimes contradictory, missions: on the one hand, the Agency seeks to promote and spread internationally the use of civilian nuclear energy; on the other hand, it seeks to prevent, or at least detect, the diversion of civilian nuclear energy to nuclear weapons, nuclear explosive devices or purposes unknown. The IAEA now operates
25431-428: The remains of the split atomic nuclei. Many fission products are either highly radioactive (but short-lived) or moderately radioactive (but long-lived), and as such, they are a serious form of radioactive contamination . Fission products are the principal radioactive component of nuclear fallout . Another source of radioactivity is the burst of free neutrons produced by the weapon. When they collide with other nuclei in
25604-601: The research results subsequently led to a moratorium on above-ground nuclear weapons testing, followed by the Partial Test Ban Treaty , signed in 1963 by John F. Kennedy and Nikita Khrushchev . On the day that the treaty went into force, the Nobel Prize Committee awarded Pauling the Nobel Peace Prize , describing him as "Linus Carl Pauling, who ever since 1946 has campaigned ceaselessly, not only against nuclear weapons tests, not only against
25777-428: The risk of nuclear war. Only one country ( South Africa ) has been known to ever dismantle an indigenously developed nuclear arsenal completely. The apartheid government of South Africa produced half a dozen crude fission weapons during the 1980s, but they were dismantled in the early 1990s. In its landmark resolution 1653 of 1961, "Declaration on the prohibition of the use of nuclear and thermo-nuclear weapons,"
25950-555: The scope of these agreements. If a nuclear-capable country does leave the NPT, it is likely to be reported by the IAEA to the United Nations Security Council , just as if it were in breach of its safeguards agreement. Trade sanctions would then be likely. IAEA safeguards can help ensure that uranium supplied as nuclear fuel and other nuclear supplies do not contribute to nuclear weapons proliferation. In fact,
26123-409: The spread of nuclear weapons did not begin until the early 1960s, after four nations (the United States, the Soviet Union, the United Kingdom and France) had acquired nuclear weapons (see List of states with nuclear weapons for more information). Although these efforts stalled in the early 1960s, they renewed once again in 1964, after China detonated a nuclear weapon. In 1968, governments represented at
26296-662: The spread of these armaments, not only against their very use, but against all warfare as a means of solving international conflicts." Pauling started the International League of Humanists in 1974. He was president of the scientific advisory board of the World Union for Protection of Life and also one of the signatories of the Dubrovnik-Philadelphia Statement . In the 1980s, a movement for nuclear disarmament again gained strength in
26469-402: The surrounding material, the neutrons transmute those nuclei into other isotopes, altering their stability and making them radioactive. The most commonly used fissile materials for nuclear weapons applications have been uranium-235 and plutonium-239 . Less commonly used has been uranium-233 . Neptunium-237 and some isotopes of americium may be usable for nuclear explosives as well, but it
26642-498: The survival of the state were at stake. Another deterrence position is that nuclear proliferation can be desirable. In this case, it is argued that, unlike conventional weapons, nuclear weapons deter all-out war between states, and they succeeded in doing this during the Cold War between the U.S. and the Soviet Union . In the late 1950s and early 1960s, Gen. Pierre Marie Gallois of France, an adviser to Charles de Gaulle , argued in books like The Balance of Terror: Strategy for
26815-473: The treaty if they forswear nuclear weapons. Research into the development of nuclear weapons was initially undertaken during World War II by the United States (in cooperation with the United Kingdom and Canada), Germany, Japan, and the USSR. The United States was the first and is the only country to have used a nuclear weapon in war, when it used two bombs against Japan in August 1945. After surrendering to end
26988-531: The use of nuclear materials. This verification is a key element in the international system which ensures that uranium in particular is used only for peaceful purposes. Parties to the NPT agree to accept technical safeguard measures applied by the IAEA. These require that operators of nuclear facilities maintain and declare detailed accounting records of all movements and transactions involving nuclear material. Over 550 facilities and several hundred other locations are subject to regular inspection, and their records and
27161-566: The war, Germany and Japan ceased to be involved in any nuclear weapon research. In August 1949, the USSR tested a nuclear weapon , becoming the second country to detonate a nuclear bomb. The United Kingdom first tested a nuclear weapon in October 1952. France first tested a nuclear weapon in 1960. The People's Republic of China detonated a nuclear weapon in 1964. India conducted its first nuclear test in 1974, which prompted Pakistan to develop its own nuclear program and, when India conducted
27334-446: The weapon system and difficult to defend against the delivery of the weapon during a potential conflict. This can mean keeping weapon locations hidden, such as deploying them on submarines or land mobile transporter erector launchers whose locations are difficult to track, or it can mean protecting weapons by burying them in hardened missile silo bunkers. Other components of nuclear strategies included using missile defenses to destroy
27507-457: The weapons of choice in contemporary conflicts. Following the retirement of Sergio Duarte in February 2012, Angela Kane was appointed as the new High Representative for Disarmament Affairs . On July 7, 2017, a UN conference adopted the Treaty on the Prohibition of Nuclear Weapons with the backing of 122 states. It opened for signature on September 20, 2017. The 2022 United Nations Disarmament Yearbook described highlights and challenges in
27680-641: The world has changed." In 2010, the four were featured in a documentary film entitled Nuclear Tipping Point . The film is a visual and historical depiction of the ideas laid forth in The Wall Street Journal op-eds and reinforces their commitment to a world without nuclear weapons and the steps that can be taken to reach that goal. Global Zero is an international non-partisan group of 300 world leaders dedicated to achieving nuclear disarmament. The initiative, launched in December 2008, promotes
27853-631: The world where there exists a single nuclear-weapon state. Aside from the public opinion that opposes proliferation in any form, there are two schools of thought on the matter: those, like Mearsheimer, who favored selective proliferation, and Waltz, who was somewhat more non- interventionist . Interest in proliferation and the stability-instability paradox that it generates continues to this day, with ongoing debate about indigenous Japanese and South Korean nuclear deterrent against North Korea . The threat of potentially suicidal terrorists possessing nuclear weapons (a form of nuclear terrorism ) complicates
28026-598: The world's longing for peace and security." With this remark, Baruch helped launch the field of nuclear ethics , to which many policy experts and scholars have contributed. Although the Baruch Plan enjoyed wide international support, it failed to emerge from the UNAEC because the Soviet Union planned to veto it in the Security Council. Still, it remained official American policy until 1953, when President Eisenhower made his " Atoms for Peace " proposal before
28199-491: The worldwide application of those safeguards and the substantial world trade in uranium for nuclear electricity make the proliferation of nuclear weapons much less likely. The Additional Protocol, once it is widely in force, will provide credible assurance that there are no undeclared nuclear materials or activities in the states concerned. This will be a major step forward in preventing nuclear proliferation. The Nuclear Suppliers Group communicated its guidelines, essentially
28372-624: The yield comes from the final fissioning of depleted uranium. Virtually all thermonuclear weapons deployed today use the "two-stage" design described to the right, but it is possible to add additional fusion stages—each stage igniting a larger amount of fusion fuel in the next stage. This technique can be used to construct thermonuclear weapons of arbitrarily large yield. This is in contrast to fission bombs, which are limited in their explosive power due to criticality danger (premature nuclear chain reaction caused by too-large amounts of pre-assembled fissile fuel). The largest nuclear weapon ever detonated,
28545-446: Was a "peaceful nuclear explosion." The country has at least three other research reactors including the tiny one which is exploring the use of thorium as a nuclear fuel, by breeding fissile U-233. In addition, an advanced heavy-water thorium cycle is under development. Nuclear weapon A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions , either fission (fission bomb) or
28718-625: Was directed by the Communist Party of the Soviet Union through the Soviet Peace Committee . Its origins lay in the Communist Information Bureau 's (Cominform) doctrine, put forward 1947, that the world was divided between peace-loving progressive forces led by the Soviet Union and warmongering capitalist countries led by the United States. In 1949, Cominform directed that peace "should now become
28891-445: Was first drawn to public attention in 1954 when a hydrogen bomb test in the Pacific contaminated the crew of the Japanese fishing boat Lucky Dragon . One of the fishermen died in Japan seven months later. The incident caused widespread concern around the world and "provided a decisive impetus for the emergence of the anti-nuclear weapons movement in many countries". The anti-nuclear weapons movement grew rapidly because for many people
29064-597: Was held shortly after the signing of the New START , and resulted in a call of action toward eliminating all nuclear weapons. Representatives from 60 countries were invited to the conference. Non-governmental organizations were also present. Among the prominent figures who have called for the abolition of nuclear weapons are "the philosopher Bertrand Russell , the entertainer Steve Allen , CNN 's Ted Turner , former Senator Claiborne Pell , Notre Dame president Theodore Hesburgh , South African Bishop Desmond Tutu and
29237-497: Was made at the meeting of the International Atomic Energy Agency (IAEA) in Vienna. As of February 2006 Iran formally announced that uranium enrichment within their borders has continued. Iran claims it is for peaceful purposes but the United Kingdom, France, Germany, and the United States claim the purpose is for nuclear weapon research and construction. India , Pakistan and Israel have been "threshold" countries in terms of
29410-813: Was organized by The Government of Norway , the Nuclear Threat Initiative and the Hoover Institute . The Conference was entitled Achieving the Vision of a World Free of Nuclear Weapons and had the purpose of building consensus between nuclear weapon states and non-nuclear weapon states in relation to the Nuclear Non-proliferation Treaty . The Tehran International Conference on Disarmament and Non-Proliferation took place in Tehran in April 2010. The conference
29583-460: Was signed with Russia for the country's first large nuclear power plant, comprising two VVER-1000 reactors, under a Russian-financed US$ 3 billion contract. The first unit is due to be commissioned in 2007. A further two Russian units are under consideration for the site. Nuclear power supplied 3.1% of India's electricity in 2000. Its weapons material appears to come from a Canadian-designed 40 MW "research" reactor which started up in 1960, well before
29756-744: Was the Special Atomic Demolition Munition , or SADM, sometimes popularly known as a suitcase nuke . This is a nuclear bomb that is man-portable, or at least truck-portable, and though of a relatively small yield (one or two kilotons) is sufficient to destroy important tactical targets such as bridges, dams, tunnels, important military or commercial installations, etc. either behind enemy lines or pre-emptively on friendly territory soon to be overtaken by invading enemy forces. These weapons require plutonium fuel and are particularly "dirty". They also demand especially stringent security precautions in their storage and deployment. Small "tactical" nuclear weapons were deployed for use as antiaircraft weapons. Examples include
29929-404: Was unnecessary and environmentally dangerous. A Los Alamos study warned "the water near a recent surface explosion will be a 'witch's brew' of radioactivity". To prepare the atoll for the nuclear tests, Bikini's native residents were evicted from their homes and resettled on smaller, uninhabited islands where they were unable to sustain themselves. Radioactive fallout from nuclear weapons testing
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