Office for Nuclear Regulation

This website uses non-intrusive anonymous cookies to improve your user experience. You can visit our cookie privacy page for more information, including details on how to opt-out.

Aims and objectives

ONR independently regulates nuclear safety and security at 37 nuclear licensed sites in the UK. We also regulate transport and ensure that safeguards obligations for the UK are met. Our duty is to ensure that the nuclear industry controls its hazards effectively, has a culture of continuous improvement and maintains high standards.

The nuclear industry is undergoing rapid change and our role as a regulator is vital in ensuring new nuclear facilities are designed, built and operated to the highest standards, and in a manner that improves public confidence without compromising safety or security.

We also oversee the decommissioning of nuclear sites and cooperate with international regulators on safety and security issues of common concern, including associated research.

Our work is critical to the protection of society at large so it is important that we do it with rigour, diligence and with an appropriate level of assurance.

What we do

Our mission is 'To provide efficient and effective regulation of the nuclear industry, holding it to account on behalf of the public' 

To do this, we must achieve three key outcomes:

How we do it

ONR sets out site licence conditions that each licensee must comply with in different ways; such as, with a safety case to meet a stage in the plant's life, or with arrangements and procedures to meet a licence condition. The conditions set out the general safety requirements to deal with the risks on a nuclear site. 

ONR seeks to maintain and improve safety standards for work with ionising radiations at licensed nuclear sites. It does so through its licensing powers by assessing safety cases and inspecting sites for licensing compliance. It sets national regulatory standards and helps to develop international nuclear safety standards.