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Nuclear safeguards

ONR is the UK's safeguards regulator, and part of the UK State System of Accounting for, and Control of, Nuclear Materials (SSAC).

Nuclear safeguards are measures to verify that countries comply with international obligations not to use nuclear materials from civil nuclear programmes for non-peaceful purposes.

ONRs safeguards function enables the UK to meet its international safeguards obligations and implements domestic legislation.

As the regulator, we must:

  • Seek and achieve sustained compliance with domestic safeguards regulations
  • Undertake inspection, assessment, and enforcement where necessary, in line with ONR guidance and enforcement policy
  • Enable the UK to meet its international safeguards obligations including the operation of the State System of Accounting for and Control of Nuclear Material
  • Facilitate the International Atomic Energy Agencys safeguards verification activities in the UK

Annual reports

These report provide an overview of our implementation of the safeguards regime in 2023, as required under Regulation 41(2) of the Nuclear Safeguards (EU Exit) Regulations 2019 (NSR19).

Safeguards reporting

If you have any questions about safeguards reporting duties, please contact your site inspector/s, or email the team at or by post to ONR Safeguards, 4N3 Redgrave Court, Merton Road, Bootle L20 7HS.

Related documents

ONR Nuclear Material Accountancy, Control, and Safeguards 
Assessment Principles (ONMACS)