Office for Nuclear Regulation

This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

Regulatory divisions

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

Our regulatory structure

Sellafield, Decommissioning, Fuel and Waste

Regulates safety Sellafield 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

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

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

Technical division

Ensuring that ONR is competently resourced to effectively regulate the health, safety and security of the UK nuclear industry against modern standards in an enabling manner.

More on the Technical division