|Administrative body||European Commission|
|Official languages||24 languages|
28 EU member states|
1 associated state
|1 January 1958|
|1 July 1967|
The European Atomic Energy Community (EAEC or Euratom) is an international organisation established by the Euratom Treaty on 25 March 1957 with the original purpose of creating a specialist market for nuclear power in Europe; developing nuclear energy and distributing it to its member states while selling the surplus to non-member states. However, over the years its scope has been considerably increased to cover a large variety of areas associated with nuclear power and ionising radiation as diverse as safeguarding of nuclear materials, radiation protection and construction of the International Fusion Reactor ITER. 
It is legally distinct from the European Union (EU), but has the same membership, and is governed by many of the EU's institutions but is the only remaining community organization that is independent from the European Union and therefore outside the regulatory control of the European Parliament. Since 2014, Switzerland has also participated in Euratom programmes as an associated state.
The Common Assembly proposed extending the powers of the European Coal and Steel Community to cover other sources of energy. However, Jean Monnet, ECSC architect and President, wanted a separate community to cover nuclear power. Louis Armand was put in charge of a study into the prospects of nuclear energy use in Europe; his report concluded that further nuclear development was needed to fill the deficit left by the exhaustion of coal deposits and to reduce dependence on oil producers. However, the Benelux states and Germany were also keen on creating a general single market, although it was opposed by France due to its protectionism, and Jean Monnet thought it too large and difficult a task. In the end, Monnet proposed the creation of separate atomic energy and economic communities to reconcile both groups.
The Intergovernmental Conference on the Common Market and Euratom at Val Duchesse in 1956 drew up the essentials of the new treaties. Euratom would foster co-operation in the nuclear field, at the time a very popular area, and would, along with the EEC, share the Common Assembly and Court of Justice of the ECSC, but not its executives. Euratom would have its own Council and Commission, with fewer powers than the High Authority of the European Coal and Steel Community. On 25 March 1957, the Treaties of Rome (the Euratom Treaty and the EEC Treaty) were signed by the ECSC members and on 1 January 1958 they came into force.
To save on resources, these separate executives created by the Rome Treaties were merged in 1965 by the Merger Treaty. The institutions of the EEC would take over responsibilities for the running of the EEC and Euratom, with all three then becoming known as the European Communities even if each legally existed separately. In 1993, the Maastricht Treaty created the European Union, which absorbed the Communities into the European Community pillar, yet Euratom still maintained a distinct legal personality.
The European Constitution was intended to consolidate all previous treaties and increase democratic accountability in them. The Euratom treaty had not been amended as the other treaties had, so the European Parliament had been granted few powers over it. However, the reason it had gone unamended was the same reason the Constitution left it to remain separate from the rest of the EU: anti-nuclear sentiment among the European electorate, which may unnecessarily turn voters against the treaty. The Euratom treaty thus remains in force relatively unamended from its original signing.
This overall timeline includes the establishment and development of Euratom, and shows that currently it is the only former EC body that has not been incorporated into the EU.
Maastricht Treaty (TEU)
|Content:||(est. alliance)||(founded WU)||(founded ECSC)||(protocol amending WU to become WEU)||(founded EEC and EURATOM)||(merging the legislative & administrative bodies of the 3 European communities)||(founded TREVI)||(amended: EURATOM, ECSC, EEC)+
|(amended: EURATOM, ECSC, and EEC to transform it into EC)+
|(amended: EURATOM, ECSC, EC to also contain Schengen, and TEU where PJCC replaced JHA)||(amended with focus on institutional changes: EURATOM, ECSC, EC and TEU)||(abolished the 3 pillars and WEU by amending: EURATOM, EC=>TFEU, and TEU)
(founded EU as an overall legal unit with Charter of Fundamental Rights, and reformed governance structures & decision procedures)
|Three pillars of the European Union:|
(with a single Commission & Council)
|European Atomic Energy Community (EURATOM)|
|European Coal and Steel Community (ECSC)||Treaty expired in 2002||European Union (EU)|
|European Economic Community (EEC)||European Community (EC)|
|Terrorism, Radicalism, Extremism and Violence Internationally (TREVI)||Justice and Home Affairs
|Police and Judicial Co-operation in Criminal Matters (PJCC)|
|European Political Cooperation (EPC)||Common Foreign and Security Policy (CFSP)|
|Franco-British alliance||Western Union (WU)||Western European Union (WEU)|
|Treaty terminated in 2011|
|This article is part of a series on the|
politics and government of
the European Union
Since 2014, Switzerland has participated in Euratom programmes as an associated state.
As of 2018, the community had co-operation agreements of various scopes with nine countries: the United States, Japan, Canada, Australia, Kazakhstan, Ukraine, Uzbekistan, Armenia, and South Africa. 
The United Kingdom announced its intention to withdraw from the EAEC on 26 January 2017, following on from its decision to withdraw from the European Union. Formal notice to withdraw from the EAEC was provided in March 2017, within the Article 50 notification letter, where the withdrawal was made explicit. Withdrawal will only become effective following negotiations on the terms of the exit, which are scheduled to last two years.
A report by the House of Commons Business, Energy and Industrial Strategy Committee, published in May 2017, questioned the legal necessity of leaving Euratom and called for a temporary extension of membership to allow time for new arrangements to be made.
In June 2017, the European Commission's negotiations task force published a Position paper transmitted to EU27 on nuclear materials and safeguard equipment (Euratom), titled "Essential Principles on nuclear materials and safeguard equipment". The following month, a briefing paper from the House of Commons Library assessed the implications of leaving Euratom.
If the UK withdraws, it might raise the question of UK nuclear fuel availability after 2019 and the need for new treaties relating to the transportation of nuclear materials.
UK politicians have speculated that the UK could stay in Euratom. Some argue that this would require – beyond the consent of the EU27 – amendment or revocation of the Article 50 letter of March 2017.
In the history of European regulation, Article 37 of the Euratom Treaty represents pioneering legislation concerning binding transfrontier obligations with respect to environmental impact and protection of humans.
The five member Commission was led by only three presidents while it had independent executives (1958–1967), all from France:
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