Nuclear Energy Agency purposes."" NEA currently consists of 33 countries from Europe, North America and the Asia-Pacific region. In 2017 Argentina and Romania accessioned to NEA as its most recent members. Together they account for approximately 85% of the world’s installed nuclear capacity. Nuclear power accounts for almost a quarter of the electricity produced in NEA Member countries. The NEA works closely with the International Atomic Energy Agency (IAEA) in Vienna and with the European Commission in Brussels. Within the OECD, there is close co-ordination with the International Energy Agency and the Environment Directorate, as well as contacts with other directorates, as appropriate.
Member states of the International Atomic Energy Agency is deposited. The United States then informs the IAEA, which notifies other IAEA Member States. Signature and ratification of the Nuclear Non-Proliferation Treaty (NPT) are not preconditions for membership in the IAEA. The IAEA has 170 member states as of May 2018. Most UN members and the Holy See are Member States of the IAEA. The dates of membership are listed below. Four states have withdrawn from the IAEA. North Korea became a member in 1974, but withdrew in 1994 after the Board of Governors found it in non-compliance with its safeguards agreement and suspended most technical cooperation. Nicaragua became