Comprehensive Nuclear-Test-Ban Treaty

The Comprehensive Nuclear-Test-Ban Treaty (CTBT) is a multilateral treaty that bans all nuclear explosions, for both civilian and military purposes, in all environments. It was adopted by the United Nations General Assembly on 10 September 1996 but has not entered into force as eight specific states have not ratified the treaty.

History

The movement for international control of nuclear weapons began in 1945, with a call from Canada and United Kingdom for a conference on the subject.Template:Sfn In June 1946, Bernard Baruch, an emissary of President Harry S. Truman, proposed the Baruch Plan before the United Nations Atomic Energy Commission, which called for an international system of controls on the production of atomic energy. The plan, which would serve as the basis for United States nuclear policy into the 1950s, was rejected by the Soviet Union as a US ploy to cement its nuclear dominance.Template:SfnTemplate:Sfn

Between the Trinity nuclear test of 16 July 1945 and the signing of the Partial Test Ban Treaty (PTBT) on 5 August 1963, 499 nuclear tests were conducted.<ref name=delcoigne>Template:Cite web</ref> Much of the impetus for the PTBT, the precursor to the CTBT, was rising public concern surrounding the size and resulting nuclear fallout from underwater and atmospheric nuclear tests, particularly tests of powerful thermonuclear weapons (hydrogen bombs). The Castle Bravo test of 1 March 1954, in particular, attracted significant attention as the detonation resulted in fallout that spread over inhabited areas and sickened a group of Japanese fishermen.<ref name=atomicheritage>Template:Cite web</ref><ref name=nsarchive>Template:Cite web</ref><ref name="nti">Template:Cite web</ref>Template:SfnTemplate:Sfn Between 1945 and 1963, the US conducted 215 atmospheric tests, the Soviet Union conducted 219, the UK conducted 21, and France conducted three.<ref name=nrdc>Template:Cite web</ref>

In 1954, following the Castle Bravo test, Prime Minister Jawaharlal Nehru of India issued the first appeal for a "standstill agreement" on testing, which was soon echoed by the British Labour Party.Template:SfnTemplate:Sfn<ref name=bravo>Template:Cite web</ref> Negotiations on a comprehensive test ban, primarily involved the US, UK, and Soviet Union, began in 1955 following a proposal by Soviet leader Nikita Khrushchev.Template:SfnTemplate:Sfn Of primary concern throughout the negotiations, which would stretch with some interruptions to July 1963, was the system of verifying compliance with the test ban and detecting illicit tests. On the Western side, there were concerns that the Soviet Union would be able to circumvent any test ban and secretly leap ahead in the nuclear arms race.Template:SfnTemplate:SfnTemplate:Sfn These fears were amplified following the US Rainier shot of 19 September 1957, which was the first contained underground test of a nuclear weapon. Though the US held a significant advantage in underground testing capabilities, there was worry that the Soviet Union would be able to covertly conduct underground tests during a test ban, as underground detonations were more difficult to detect than above-ground tests.Template:SfnTemplate:Sfn On the Soviet side, conversely, the on-site compliance inspections demanded by the US and UK were seen as amounting to espionage.Template:Sfn Disagreement over verification would lead to the Anglo-American and Soviet negotiators abandoning a comprehensive test ban (i.e., a ban on all tests, including those underground) in favor of a partial ban, which would be finalized on 25 July 1963. The PTBT, joined by 123 states following the original three parties, banned detonations for military and civilian purposes underwater, in the atmosphere, and in outer space.Template:Sfn<ref name=siglist>Template:Cite web</ref><ref name=unoda>Template:Cite web</ref>

The PTBT had mixed results. On the one hand, enactment of the treaty was followed by a substantial drop in the atmospheric concentration of radioactive particles.<ref name=radiocarbon>Template:Cite web</ref><ref>Template:Cite web</ref> On the other hand, nuclear proliferation was not halted entirely (though it may have been slowed) and nuclear testing continued at a rapid clip. Compared to the 499 tests from 1945 to the signing of the PTBT, 436 tests were conducted over the ten years following the PTBT.<ref>Template:Cite web</ref>Template:Sfn Furthermore, US and Soviet underground testing continued "venting" radioactive gas into the atmosphere.<ref name=nsa2>Template:Cite web</ref> Additionally, though underground testing was generally safer than above-ground testing, underground tests continued to risk the leaking of radionuclides, including plutonium, into the ground.<ref>Template:Cite web</ref><ref>Template:Cite report</ref><ref>Template:Cite web</ref> From 1964 through 1996, the year of the CTBT's adoption, an estimated 1,377 underground nuclear tests were conducted. The final non-underground (atmospheric or underwater) test was conducted by China in 1980.<ref name=sipritally>Template:Cite book</ref><ref name=nuclear>Template:Cite web</ref>

The PTBT has been seen as a step towards the Nuclear Non-proliferation Treaty (NPT) of 1968, which directly made reference to the PTBT.<ref name=faschron>Template:Cite web</ref> Under the NPT, non-nuclear weapon states were prohibited from possessing, manufacturing, and acquiring nuclear weapons or other nuclear explosive devices. All signatories, including nuclear weapon states, were committed to the goal of total nuclear disarmament. However, India, Pakistan, and Israel have declined to sign the NPT on grounds that such a treaty is fundamentally discriminatory as it places limitations on states that do not have nuclear weapons while making no efforts to curb weapons development by declared nuclear weapons states.Template:Cite needed

In 1974, a step towards a comprehensive test ban was made with the Threshold Test Ban Treaty (TTBT), ratified by the US and Soviet Union, which banned underground tests with yields above 150 kilotons.<ref name=nsa2/><ref>Template:Cite web</ref> In April 1976, the two states reached agreement on the Peaceful Nuclear Explosions Treaty (PNET), which concerns nuclear detonations outside the weapons sites discussed in the TTBT. As in the TTBT, the US and Soviet Union agreed to bar peaceful nuclear explosions (PNEs) at these other locations with yields above 150 kilotons, as well as group explosions with total yields in excess of 1,500 kilotons. To verify compliance, the PNET requires that states rely on national technical means of verification, share information on explosions, and grant on-site access to counterparties. The TTBT and PNET did not enter into force for the US and Soviet Union until 11 December 1990.<ref name=pnetreaty>Template:Cite web</ref>

File:Gorbachev and Reagan 1987-9.jpg

Reagan and Gorbachev, December 1987

In October 1977, the US, UK, and Soviet Union returned to negotiations over a test ban. The three nuclear powers made notable progress in the late 1970s, agreeing to terms on a ban on all testing, including a temporary prohibition on PNEs, but continued disagreements over the compliance mechanisms led to an end to negotiations ahead of Ronald Reagan's inauguration as President in 1981.<ref name=faschron/> In 1985, Soviet leader Mikhail Gorbachev announced a unilateral testing moratorium, and in December 1986, Reagan reaffirmed US commitment to pursue the long-term goal of a comprehensive test ban. In November 1987, negotiations on a test ban restarted, followed by a joint US-Soviet program to research underground-test detection in December 1987.<ref name=faschron/><ref>Template:Cite news</ref>

Negotiations

Given the political situation prevailing in the subsequent decades, little progress was made in nuclear disarmament until the end of the Cold War in 1991. Parties to the PTBT held an amendment conference that year to discuss a proposal to convert the Treaty into an instrument banning all nuclear-weapon tests. With strong support from the UN General Assembly, negotiations for a comprehensive test-ban treaty began in 1993.

Adoption

Intensive efforts were made over the next three years to draft the Treaty text and its two annexes. However, the Conference on Disarmament, in which negotiations were being held, did not succeed in reaching consensus on the adoption of the text. Under the direction of Prime Minister John Howard and Foreign Minister Alexander Downer, AustraliaTemplate:Citation needed then sent the text to the United Nations General Assembly in New York, where it was submitted as a draft resolution.<ref>Template:Cite web</ref> On 10 September 1996, the Comprehensive Test-Ban Treaty (CTBT) was adopted by a large majority, exceeding two-thirds of the General Assembly's Membership.<ref name="un.org">Template:Cite web</ref>

Obligations

(Article I):<ref>Template:Cite web</ref>

1. Each State Party undertakes not to carry out any nuclear weapon test explosion or any other nuclear explosion, and to prohibit and prevent any such nuclear explosion at any place under its jurisdiction or control.
2. Each State Party undertakes, furthermore, to refrain from causing, encouraging, or in any way participating in the carrying out of any nuclear weapon test explosion or any other nuclear explosion.

Status

Template:Further The Treaty was adopted by the United Nations General Assembly on 10 September 1996.<ref name=untc/> It opened for signature in New York on 24 September 1996,<ref name=untc>United Nations Treaty Collection (2009). "Comprehensive Nuclear-Test-Ban Treaty". Retrieved 23 August 2009.</ref> when it was signed by 71 States, including five of the eight then nuclear-capable states. As of October 2016, 166 states have ratified the CTBT and another 17 states have signed but not ratified it.<ref name=status>Template:Cite web</ref><ref>Template:Citation
In this news article, the number of states ratifying was reported as 154.</ref>

The treaty will enter into force 180 days after the 44 states listed in Annex 2 of the treaty have ratified it. These "Annex 2 states" are states that participated in the CTBT’s negotiations between 1994 and 1996 and possessed nuclear power reactors or research reactors at that time.<ref>Template:Cite web</ref> As of 2016, eight Annex 2 states have not ratified the treaty: China, Egypt, Iran, Israel and the United States have signed but not ratified the Treaty; India, North Korea and Pakistan have not signed it.<ref>Template:Cite web</ref>

Monitoring

Geophysical and other technologies are used to monitor for compliance with the Treaty: forensic seismology, hydroacoustics, infrasound, and radionuclide monitoring. The technologies are used to monitor the underground, the waters and the atmosphere for any sign of a nuclear explosion. Statistical theories and methods are integral to CTBT monitoring providing confidence in verification analysis. Once the Treaty enters into force, on site inspection will be provided for where concerns about compliance arise.

The Preparatory Commission for the Comprehensive Test Ban Treaty Organization (CTBTO), an international organization headquartered in Vienna, Austria, was created to build the verification regime, including establishment and provisional operation of the network of monitoring stations, the creation of an international data centre, and development of the On Site Inspection capability.

The monitoring network consists of 337 facilities located all over the globe. As of May 2012, more than 260 facilities have been certified. The monitoring stations register data that is transmitted to the international data centre in Vienna for processing and analysis. The data are sent to states that have signed the Treaty.<ref>Template:Cite web</ref>

Subsequent nuclear testing

Three countries have tested nuclear weapons since the CTBT opened for signature in 1996. India and Pakistan both carried out two sets of tests in 1998. North Korea carried out five announced tests in 2006, 2009, 2013, and two in 2016. All five North Korean tests were picked up by the International Monitoring System set up by the Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission. A North Korean test is believed to have taken place in January 2016, evidenced by an "artificial earthquake" measured as a magnitude 5.1 by the U.S. Geological Survey.<ref name=highlight>Template:Cite web</ref><ref name=press>Template:Cite web</ref><ref>Template:Cite news</ref>

See also

• List of weapons of mass destruction treaties
• Comprehensive Nuclear-Test-Ban Treaty Organization
• Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission
• National technical means of verification
• Nuclear-free zone

References

Publications

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External links

• Full text of the treaty
• CTBTO Preparatory CommissionTemplate:Spaced ndashofficial news and information
• The Test Ban Test: U.S. Rejection has Scuttled the CTBT
• US conducts subcritical nuclear test ABC News, 24 February 2006
• International Physicians for the Prevention of Nuclear War, 1991
• Daryl Kimball and Christine Kucia, Arms Control Association, 2002
• General John M. Shalikashvili, Special Advisor to the President and the Secretary of State for the Comprehensive Test Ban Treaty
• Christopher Paine, Senior Researcher with NRDC's Nuclear Program, 1999
• Obama or McCain Can Finish Journey to Nuclear Test Ban Treaty
• For the number of nuclear explosions conducted in various parts of the globe from 1954-1998 seeTemplate:Spaced ndashhttp://blip.tv/file/1662914/
• Introductory note by Thomas Graham, Jr., procedural history note and audiovisual material on the Comprehensive Nuclear Test Ban Treaty in the United Nations Audiovisual Library of International Law
• Lecture by Masahiko Asada entitled Nuclear Weapons and International Law in the Lecture Series of the United Nations Audiovisual Library of International Law
• Comprehensive Nuclear-Test-Ban Treaty: Background and Current Developments Congressional Research Service
• The Woodrow Wilson Center's Nuclear Proliferation International History Project or NPIHP is a global network of individuals and institutions engaged in the study of international nuclear history through archival documents, oral history interviews and other empirical sources.