The European Nuclear Safety Regulators Group (ENSREG) was established in 2007. It is an independent expert group at the European Commission, consisting of high-level representatives of the independent nuclear regulators of the European Union member states. The Council of the EU,  IAEA, the OECD Nuclear Energy Agency, WENRA, Belarus, Norway, Switzerland and Turkey have observer status. The purpose of ENSREG is coordination between Member States in order to assist the European Commission on:

• the safety of nuclear installations in the European Union;
• the safety in the management of spent fuel and radioactive waste;
• financing the decommissioning of nuclear installations in the European Union.

At the level of Chairman and Vice-Chairman, BNRA participates in the sessions and conferences of ENSREG. Under the leadership of ENSREG, 2 types of safety inspections of nuclear power plants in the European Union are conducted. Topical peer reviews In accordance with Directive 2014/87 / Euratom, a mechanism has been set up to conduct topical peer reviews every 6 years of nuclear power plants in the EU on issues of strategic importance from the point of view of their safety. The first topical peer review “Ageing Management” started in 2017. During the review, EU Member States operating nuclear power plants submitted national reports and subsequently national plans to implement the recommendations on the reports. The second topical peer review “Fire Protection” will start in 2023. Stress tests Following the Fukushima accident a program was launched to conduct stress tests for the safety of the nuclear power plants in the European Union. Under this program, EU Member States operating nuclear power plants submitted national reports and subsequently national plans to implement the report’s recommendations. Switzerland and Ukraine joined the stress test program on a voluntary basis, and subsequently the program was joined by other countries outside the European Union – Armenia, Belarus and Turkey. The Chairman of the NRA is a member of the Stress Tests Board for Third Countries within ENSREG, which monitors the implementation of recommendations on the safety of nuclear power plants in non-EU countries. The Bulgarian Nuclear Regulatory Agency presents to ENSREG the national reports and plans of the Republic of Bulgaria on topical peer reviews and stress tests.