Office for Nuclear Regulation

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Key operational programmes

ONR has 5 regulatory programmes / functions that reflect key nuclear industry sectors and help us deliver our Strategic Plan.

Our regulatory structure

Sellafield, Decommissioning, Fuel and Waste

Regulates safety Sellafield and Windscale nuclear licensed sites as well as a variety of other nuclear fuel sites including fuel cycle, nuclear research, waste management and decommissioning sites.

More on Sellafield, Decommissioning, Fuel and Waste

New reactors

Systematic design assessment of potential new reactor designs planned for operation in the UK.

More on new reactors

Civil nuclear security

Regulates security in the UK's civil nuclear industry in order to prevent the theft or sabotage of nuclear material an/or the sabotage of nuclear facilities.

More on civil nuclear security

Cross ONR programme

The Cross ONR programme is responsible for taking forward strategic cross-cutting operational themes.

More on the Cross ONR programme

Operating facilities

ONR regulates the safety and security of operating nuclear power stations and safety on the nuclear sites that form an integral part to the delivery of the UK’s nuclear deterrent and other maritime defences.

More on operating facilities


Assurance, Policy & International Directorate

The Regulatory Assurance Programme delivers independent operational oversight across all of ONR's regulatory functions. The aim of the programme is to secure the confidence of stakeholders, including Government and the ONR Board/Executive, in the robustness of ONR's regulatory processes and decision making.

More on the Assurance, Policy and International Directorate