UK Radiological Legislation and Regulatory Framework
Effective radiation protection in the UK is underpinned by a comprehensive and evolving legal framework.
RP Alba Ltd supports duty holders, employers, Radiation Protection Advisers (RPAs), Radiation Protection Supervisors (RPSs), and radioactive-waste practitioners in understanding and complying with these requirements across industrial, medical, research, transport, and environmental contexts.
This page provides an overview of the principal UK legislation, regulations, and statutory guidance governing the use of ionising radiation and radioactive materials, with particular emphasis on practical compliance, proportional risk management, and alignment with recognised best practice.
While the underlying principles of radiation protection are consistent across the UK, important regulatory distinctions exist between Great Britain and Northern Ireland, and—within Great Britain—between devolved environmental regulators. RP Alba Ltd provides advice that is tailored to these distinctions.
Core UK Radiation Protection Legislation
The control of exposure to ionising radiation in the United Kingdom is founded on a hierarchy of legislation, supported by detailed regulations, Approved Codes of Practice (ACoPs), and authoritative guidance.
RP Alba Ltd supports employers, duty holders, Radiation Protection Advisers (RPAs), Radiation Protection Supervisors (RPSs), and radioactive-waste practitioners in understanding how this framework applies in practice across industrial, medical, research, transport, nuclear, and environmental settings.
This page provides an overview of the key Acts of Parliament and the principal Regulations made under them that govern the use of ionising radiation and radioactive materials in the UK. The emphasis is on legal clarity, proportional compliance, and practical implementation, rather than simply listing regulatory titles.
Legislative Structure: Acts and Regulations
UK radiation protection law operates through primary legislation (Acts of Parliament) that establish broad legal duties and enforcement powers. These Acts are supported by secondary legislation (Regulations), which set out specific, enforceable requirements.
Radiation protection is not governed by a single Act or regulator. Instead, it sits across health and safety, environmental protection, transport safety, and emergency preparedness legislation, each addressing different aspects of radiological risk.
Understanding how these regimes interact is essential for effective and defensible compliance.
Health and Safety at Work Framework
Occupational radiation protection in Great Britain is underpinned by the Health and Safety at Work etc. Act 1974 (HASAWA).
HASAWA places a general duty on employers to ensure, so far as is reasonably practicable, the health, safety, and welfare of employees and others who may be affected by their work. It also provides the statutory powers under which radiation-specific regulations are made and enforced.
Enforcement action in relation to radiation protection is typically taken with reference to both HASAWA duties and the relevant radiation regulations, rather than the regulations in isolation.
Occupational Radiation Protection Regulations
The Ionising Radiations Regulations 2017 (IRR17) are made under the Health and Safety at Work etc. Act 1974 and form the cornerstone of occupational radiation protection law in Great Britain.
IRR17 establishes detailed legal requirements for work involving ionising radiation, including duties to:
Apply the principles of justification, optimisation (ALARP), and dose limitation
Undertake and maintain suitable and sufficient radiation risk assessments
Appoint a competent Radiation Protection Adviser
Establish local rules, written arrangements, and contingency plans
Designate controlled and supervised areas
Classify workers and implement appropriate monitoring programmes
Provide information, instruction, and training
Protect employees, contractors, trainees, and members of the public
IRR17 applies across all sectors, including X-ray use, sealed and unsealed radioactive sources, NORM activities, accelerators, and interfaces with transport and waste management.
In Northern Ireland the Ionising Radiations Regulations (Northern Ireland) 2017, IRR(NI)17, apply. These regulations are virtually identical to the GB regulations. The Office for Nuclear Regulation (ONR) regulate class 7 dangerous goods transport.
Justification of Practices Involving Ionising Radiation
The requirement for justification is addressed through the Justification of Practices Involving Ionising Radiation Regulations, which are made under enabling primary legislation separate from IRR17.
These Regulations ensure that new or modified classes or types of practice involving ionising radiation are only permitted where the overall benefit outweighs the radiation detriment.
Justification is a high-level, strategic control, typically applied at government or regulatory level. However, duty holders must understand how justification decisions interact with their responsibilities under IRR17, particularly when introducing new technologies, equipment, or operational practices.
Environmental and Radioactive Substances Regulation
The control of radioactive substances from an environmental protection perspective is legally distinct from occupational radiation protection under HASAWA.
RP Alba Ltd supports organisations in ensuring that environmental authorisation conditions are aligned with IRR17 controls, avoiding regulatory gaps or conflicting requirements.
Scotland
In Scotland, environmental regulation of radioactive substances is primarily provided through the Environmental Authorisations (Scotland) Regulations 2018 (EASR). These Regulations are made under powers provided by the Regulatory Reform (Scotland) Act 2014.
EASR provides the legal mechanism by which the Scottish Environment Protection Agency authorises and regulates:
Accumulation and disposal of radioactive waste
Discharges of radioactive substances to the environment
Application of Best Practicable Means (BPM)
England and Wales
In England and Wales, equivalent controls are provided by the Environmental Permitting (England and Wales) Regulations, made under powers derived from the Environmental Protection Act 1990 and related legislation.
These regimes apply the principle of Best Available Techniques (BAT) and are enforced by the Environment Agency and Natural Resources Wales, respectively.
Northern Ireland
In Northern Ireland, the regulation of radioactive substances from an environmental perspective is separate from Great Britain and operates under its own legislative framework.
Environmental controls are exercised under the Radioactive Substances Act 1993, as retained and applied in Northern Ireland, with regulatory oversight provided by the Northern Ireland Environment Agency (NIEA).
This regime governs the accumulation, disposal, and discharge of radioactive waste and radioactive substances to the environment. Duty holders operating in Northern Ireland must therefore ensure that environmental permitting and compliance arrangements are aligned with NIEA requirements, in parallel with occupational radiation protection duties under health and safety legislation.
Medical Exposure to Ionising Radiation
Medical exposure to ionising radiation in the UK is regulated separately from occupational exposure under IRR17/IRR(NI)17, through the Ionising Radiation (Medical Exposure) Regulations (IR(ME)R). These Regulations implement international standards for the protection of patients and other individuals undergoing medical exposure, ensuring that such exposures are justified, optimised, and appropriately governed.
IR(ME)R applies across Great Britain and Northern Ireland and places legal duties on defined duty holders, including employers, practitioners, operators, and referrers, in relation to activities such as diagnostic imaging, interventional procedures, radiotherapy, and non-medical imaging exposures.
The Regulations require, among other things:
Justification of medical exposures before they are carried out
Optimisation of doses consistent with the intended clinical purpose
Clear allocation of roles and responsibilities
Use of diagnostic reference levels (DRLs)
Quality assurance, training, and incident investigation arrangements
Although IR(ME)R operates alongside IRR17/IRR(NI)17, its focus is on patient protection, rather than occupational or public exposure arising from work activities.
Enforcement of IR(ME)R is carried out by healthcare regulators, rather than the Health and Safety Executive, reflecting the clinical context in which medical exposures occur:
In England, IR(ME)R is enforced by the Care Quality Commission (CQC)
In Scotland, enforcement is carried out by Healthcare Improvement Scotland (HIS)
In Wales, IR(ME)R is enforced by Healthcare Inspectorate Wales (HIW)
In Northern Ireland, enforcement responsibility rests with the Regulation and Quality Improvement Authority (RQIA)
Duty holders operating across multiple UK jurisdictions must therefore ensure that their IR(ME)R arrangements meet both the regulatory requirements of the Regulations and the expectations of the relevant enforcing authority.
Cosmic Radiation and Aircrew Exposure
Exposure to cosmic radiation affecting aircrew is regulated through aviation legislation, rather than through IRR17/IRR(NI)17 or environmental law.
In the UK, requirements relating to cosmic radiation exposure of aircrew are implemented through the Air Navigation Order and associated aviation regulations, which give effect to international aviation safety standards. These requirements recognise aircrew as occupationally exposed to ionising radiation due to altitude-related cosmic radiation.
Oversight is provided by the Civil Aviation Authority (CAA), which sets expectations for airlines to assess exposure, inform aircrew, and manage doses appropriately.
Although aircrew exposure is not regulated under IRR17/IRR(NI)17 in the same way as terrestrial radiation work, the underlying radiation protection principles of justification, optimisation, and dose limitation remain applicable.
Radioactivity in Foodstuffs and Drinking Water
Radioactivity in Food and Animal Feed
The control of radioactivity in foodstuffs and animal feed in the UK is regulated separately from occupational radiation protection and environmental permitting. It is addressed through food safety legislation, rather than through the Ionising Radiations Regulations.
These controls are implemented under the Food Safety Act 1990 and retained EU food law, which set maximum permitted levels of radioactive contamination in food and feed, particularly in the context of a radiological or nuclear incident.
Regulatory responsibility lies with the UK food standards authorities:
In England, Wales, and Northern Ireland, this function is carried out by the Food Standards Agency (FSA)
In Scotland, it is carried out by Food Standards Scotland (FSS)
These bodies are responsible for monitoring, enforcement, and the introduction of food restrictions where necessary to protect public health.
Radioactivity in Drinking Water
Radioactivity in drinking water is regulated under drinking water legislation, rather than under IRR17 or food safety law. Regulatory responsibility depends on the type of water supply.
For public (mains) water supplies, compliance with statutory drinking water quality standards—including radioactive parameters such as tritium, radon and indicative dose—is enforced by specialist drinking water regulators:
In England and Wales, the Drinking Water Inspectorate (DWI)
In Scotland, the Drinking Water Quality Regulator for Scotland (DWQR)
In Northern Ireland, the Drinking Water Inspectorate operating within the Department for Infrastructure
For private water supplies (such as wells and boreholes), regulatory responsibility rests with local authorities, typically exercised through Environmental Health Officers, who assess risks, monitor compliance, and require remedial action where necessary.
Transport of Radioactive Material
The transport of radioactive material is regulated under transport and dangerous goods legislation, rather than health and safety or environmental law.
In Great Britain, the primary framework is the Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations, made under transport legislation and international implementation powers. These Regulations give domestic legal effect to international agreements, including ADR (Accord relatif au transport international des marchandises Dangereuses par Route).
In Northern Ireland, transport of dangerous goods (including Class 7 radioactive material) is governed by the Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations (Northern Ireland) 2010, which give domestic effect to ADR and apply to road and rail carriage within the Northern Ireland regulatory framework.
For radioactive material, the Regulations implement ADR Class 7, which is based on international standards developed by the International Atomic Energy Agency.
Transport legislation places duties on consignors, carriers, consignees, and transport workers, covering:
Packaging, labelling, and transport documentation
Radiation hazard awareness and training
Emergency arrangements and incident response
Transport requirements interface directly with IRR17/IRR(NI)17 duties under HASAWA, making coordinated compliance essential.
Nuclear Safeguards
Nuclear safeguards are concerned with the accountancy, control, and non-proliferation of nuclear material, rather than radiation protection in the conventional health and safety sense.
In the UK, nuclear safeguards are provided for under the Nuclear Safeguards Act 2018, which establishes a domestic safeguards regime following withdrawal from Euratom. This framework ensures compliance with international obligations, including those arising from the Treaty on the Non-Proliferation of Nuclear Weapons.
Safeguards are regulated by the Office for Nuclear Regulation, acting in its role as the UK safeguards authority. While safeguards requirements are distinct from IRR17/IRR(NI)17 and environmental permitting, organisations handling nuclear material must ensure that material accountancy, reporting, and inspection arrangements are compatible with their wider radiation protection and security systems.
Nuclear Installations and Licensed Civil Sites
Nuclear site licensing and third-party liability for civil nuclear installations are governed by the Nuclear Installations Act 1965. The Act provides the legal framework for the licensing of prescribed nuclear installations and establishes a regime of strict liability for nuclear damage.
Civil nuclear sites must hold a nuclear site licence, issued and enforced by the Office for Nuclear Regulation (ONR). Licence conditions impose legally binding requirements relating to nuclear safety, security, and radioactive waste management.
While the Nuclear Installations Act operates alongside the Ionising Radiations Regulations 2017, it addresses nuclear safety at a site-wide and strategic level, rather than routine occupational exposure control. Duty holders on licensed sites must therefore ensure that IRR17 arrangements are fully integrated with nuclear site licence conditions and ONR expectations.
Defence Nuclear Sites and Activities
Nuclear activities undertaken for defence purposes are regulated under a separate statutory and regulatory framework from civil nuclear installations.
Defence nuclear sites are not licensed under the Nuclear Installations Act 1965. Instead, nuclear safety and radiation protection are overseen through arrangements established by the Secretary of State for Defence, with regulatory functions carried out by the Defence Nuclear Safety Regulator (DNSR), which operates as a specialist regulatory function within the Office for Nuclear Regulation.
Defence sites and contractors remain subject to the Ionising Radiations Regulations 2017 and other applicable health and safety legislation, but enforcement and assurance arrangements reflect the special constitutional and national security status of defence activities.
Organisations operating within the defence nuclear sector must therefore navigate a hybrid regulatory landscape, integrating IRR17 compliance with defence-specific nuclear safety governance and assurance processes.
Emergency Preparedness and Public Information
The Radiation (Emergency Preparedness and Public Information) Regulations 2019 (REPPIR) are made under the Health and Safety at Work etc. Act 1974.
REPPIR addresses scenarios where a radiation incident could result in significant off-site consequences, placing duties on operators and local authorities to:
Identify reasonably foreseeable radiation emergency scenarios
Assess potential off-site impacts
Establish emergency planning zones where required
Provide information to the public before and during an emergency
REPPIR complements IRR17 but focuses on public protection and emergency response, rather than routine occupational exposure control.
In Northern Ireland, the Radiation (Emergency Preparedness and Public Information) Regulations (Northern Ireland) 2019 apply.
Safety Signs, Signals, and Area Demarcation
The Health and Safety (Safety Signs and Signals) Regulations 1996 are made under the Health and Safety at Work etc. Act 1974 and set requirements for the use of standardised safety signs, warning symbols, and visual communication in workplaces.
In radiation environments, these Regulations are particularly relevant to:
Marking of controlled and supervised areas
Use of ionising radiation warning signs
Communication of residual risks where hazards cannot be eliminated
Compliance with IRR17 area designation requirements must therefore be considered alongside the Safety Signs and Signals Regulations to ensure signage is legally compliant, recognisable, and effective.
In Northern Ireland, the Health and Safety (Safety Signs and Signals) Regulations (Northern Ireland) 1996 apply.
Approved Codes of Practice and Guidance
Acts and Regulations set out legal requirements, but compliance is often assessed with reference to:
Approved Codes of Practice (ACoPs) issued by the Health and Safety Executive
Regulator guidance from HSE, SEPA, the Environment Agency, Natural Resources Wales, and UKHSA
Relevant international standards where adopted or referenced by UK regulators
RP Alba Ltd aligns its consultancy and training services with these materials to ensure that duty holders can demonstrate robust, defensible, and regulator-ready compliance.
A Coordinated and Evolving Framework
UK radiological legislation continues to evolve in response to international recommendations, operational experience, and technological change.
RP Alba Ltd actively monitors these developments and supports clients in translating statutory requirements into practical, proportionate systems that work in real organisations, across health and safety, environmental protection, transport, and emergency preparedness.
If you require support interpreting how this framework applies to your activities, RP Alba Ltd can provide tailored advice, training, and ongoing compliance support.