UK NUCLEAR ENERGY LAW AND REGULATION

Introduction

UK nuclear energy law governs the licensing, construction, operation, security, environmental regulation, radioactive-waste management and decommissioning of nuclear installations. Nuclear power is subject to a particularly intensive regulatory system because failures may create serious consequences for workers, the public and the environment. The principal legal framework includes the Nuclear Installations Act 1965, Energy Act 2013, Health and Safety at Work etc. Act 1974, Environmental Permitting (England and Wales) Regulations 2016, Ionising Radiations Regulations 2017, Nuclear Safeguards Act 2018 and associated regulations. The central nuclear regulator for Great Britain is the Office for Nuclear Regulation (ONR).

Nuclear Site Licensing

Under the Nuclear Installations Act 1965, a nuclear installation generally cannot be installed or operated without a nuclear site licence granted by ONR. Only a corporate body may hold such a licence. The licence remains important throughout the facility's life cycle, including construction, commissioning, operation and decommissioning.

ONR normally attaches 36 standard licence conditions covering matters such as safety cases, emergency arrangements, staff training, maintenance, modifications, nuclear material, radioactive waste and decommissioning. The system places primary responsibility for nuclear safety upon the licensee rather than transferring operational responsibility to the regulator.

Before licensing a new installation, ONR examines the applicant's organisational capability, proposed site, hazards, safety submissions and ability to comply with licence conditions. A nuclear site licence itself does not automatically authorise nuclear-related construction; additional regulatory permission may still be required.

Office for Nuclear Regulation

The Energy Act 2013, Part 3 established ONR as the statutory nuclear regulator. Its responsibilities cover nuclear safety, nuclear security, safeguards, transport of radioactive materials and health and safety at licensed nuclear sites.

ONR therefore combines conventional enforcement powers with specialist nuclear regulatory functions. Nuclear security and safeguards are particularly significant because regulation must prevent unauthorised access to nuclear material while ensuring compliance with the UK's international non-proliferation obligations. Post-Euratom domestic safeguards are supported by the Nuclear Safeguards (EU Exit) Regulations 2019.

Environmental Regulation and Radioactive Waste

Nuclear operators must also satisfy environmental requirements separate from ONR licensing. In England, the Environment Agency regulates radioactive-substances activities under the Environmental Permitting Regulations 2016. Environmental permits may impose limits on radioactive discharges to air and water and regulate radioactive-waste disposal.

This creates a dual-regulator model: ONR concentrates principally on nuclear safety and security, while environmental regulators address pollution, radioactive releases and environmental protection. Planning and development consent may additionally be required for major new nuclear generating stations.

CASE LAW

Case Name/Citation: R (Greenpeace Ltd) v Secretary of State for Trade and Industry [2007] EWHC 311 (Admin)

Facts: Greenpeace challenged the Government's 2006 decision supporting new nuclear generation, arguing that the consultation preceding that decision was inadequate.

Legal Issue: Whether the Government had fulfilled its commitment to conduct the fullest public consultation before adopting a policy supporting new nuclear construction.

Judgment: The High Court held that the consultation process was seriously flawed and procedurally unfair. The policy decision was therefore unlawful.

Legal Principle/Ratio: Where government promises meaningful consultation on major nuclear policy, consultees must receive sufficient information and a genuine opportunity to respond before the decision is taken.

Significance: The case establishes that nuclear-energy policy remains subject to administrative-law requirements of procedural fairness, transparency and legitimate expectation.

Case Name/Citation: R (Together Against Sizewell C Ltd) v Secretary of State for Energy Security and Net Zero [2023] EWCA Civ 1517

Facts: The claimant challenged development consent for the Sizewell C nuclear power station, including arguments concerning the environmental effects of providing permanent potable water to the project.

Legal Issue: Whether the Secretary of State was required to assess the water-supply proposal as part of the nuclear project or cumulatively with it under the Habitats Regulations 2017.

Judgment: The Court of Appeal rejected the challenge and upheld the decision permitting the project to proceed.

Legal Principle/Ratio: Nuclear development consent must comply with environmental assessment and habitats-protection legislation, but courts will distinguish between the authorised project and sufficiently separate future infrastructure where the statutory framework permits that distinction.

Significance: The case demonstrates the interaction between nuclear-energy regulation, planning law and environmental protection.

Conclusion

UK nuclear-energy regulation operates through a multi-layered system of licensing, safety regulation, security, safeguards, environmental permitting and planning control. The Nuclear Installations Act 1965 and Energy Act 2013 place ONR at the centre of nuclear governance, while environmental regulators control radioactive releases and waste. Case law confirms that nuclear development is also constrained by public-law principles, consultation duties and environmental assessment requirements.