1. Overview

Before carrying out most work with ionising radiation or working in an atmosphere containing radon above a certain level, employers must notify or apply to the Health and Safety Executive (HSE).

For work that is:

  • low risk – you must notify
  • medium risk – you must apply for a registration
  • high risk – you must apply for consent

You might have to notify or hold registrations and consents at the same time.

You can notify or apply using HSE’s RADAN online service.

HSE will assess applications for consent and will carry out an inspection. This may take up to 90 days.

If your application for registration or consent is successful, you will be issued with a certificate based on the information submitted as well as associated conditions.


  • Notify – no fee charged
  • Registration – application fee of £26
  • Consent – you will be charged the costs incurred by HSE to assess your application and carry out an inspection. The average cost is expected to be up to £6,000 per consent depending on the suitability and complexity of your application

Registrations or consents granted before 1 October 2023

As a result of recommendations made by the International Atomic Energy Agency (IAEA), if you hold a registration or consent granted before 1 October 2023, you will be asked to provide further information.

You do not need to do anything until HSE contacts you and your existing registration or consent(s) will continue to apply.

Consent holders

We will contact you and require you to provide a safety assessment.

Registration holders

We will contact you before April 2024 and require you to provide additional information about the extent and purpose of your work.

Previous certificates

You can view and download certificates from before 1 October 2023 by signing into the account you created when you applied.

Sign in to previous account


The requirements to notify or apply to HSE for a registration or consent are detailed in the Ionising Radiations Regulations 2017 (IRR17).

IRR17 provides a framework for ensuring that exposures to ionising radiation arising from work activities are kept as low as reasonably practicable and do not exceed specified dose limits.

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Updated 2024-03-25