Notice of commencement: entry into force of the Convention on Supplementary Compensation for Nuclear Damage (CSC)
Published 21 January 2026
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The UK has acceded to the Convention on Supplementary Compensation for Nuclear Damage (CSC), which entered into force in respect of the UK on 1 January 2026.
The amendments to the Nuclear Installations Act 1965 that implement the CSC in the UK also came into force on 1 January 2026. These amendments were made by section 305 and schedule 22 of the Energy Act 2023 and the Nuclear Installations (Compensation for Nuclear Damage) (Amendment) Regulations 2025.
The UK’s accession to the CSC will give greater confidence to private investors and the nuclear supply chain, helping to unlock new projects. It further strengthens our third party liability regime by establishing treaty relations with the contracting parties to the CSC and ensures greater amounts of compensation would be available through an international fund contributed to by the contracting parties in the unlikely event of a nuclear incident.