Office for Nuclear Regulation & Environment Agency

Generic Design Assessment (GDA) of new nuclear power stations

These web pages are joint regulator pages for both the Office for Nuclear Regulation (ONR) and Environment Agency. The regulators are working together to ensure that any new nuclear power stations built in the UK meet high standards of safety, security, environmental protection and waste management, through a process called Generic Design Assessment (GDA).

Before a new nuclear power station can be built and operated in the UK, in addition to the reactor design going through the GDA process, the proposed operator must obtain permission from regulators and Government in the form of:

  • Site licence and relevant consent to begin nuclear-related construction from ONR;
  • Environmental permits from Environment Agency or Natural Resources Wales (NRW);
  • Planning permission from the Department for Business, Energy and Industrial Strategy (BEIS).

More on the background

Environment Agency consultation on UK HPR1000 design

5 April

The Environment Agency’s consultation on its preliminary conclusions following its detailed assessment of the environmental aspects of the UK HPR1000 new nuclear power station design is now closed.

The 12-week consultation ran from 11 January 2021 until 4 April 2021.

The Environment Agency will publish a document containing all responses made to the consultation in May 2021.

It will carefully consider all the responses and complete the detailed assessment. It will then summarise the responses to the consultation, issues raised and its views on those issues in a decision document.

The Environment Agency aims to publish its final conclusions, alongside the ONR, in early 2022.

You can find details of the consultation questions, detailed assessment topics and Assessment Findings in the full consultation document and assessment reports on GOV.UK and the Environment Agency’s online consultation hub.

Public dialogue report assessing new nuclear power station designs

This report provides details of learning to come out of the Sciencewise supported project.

Sciencewise report

GDA comments process

You can make a comment about a design via the reactor designer’s website. The reactor designer will respond to the comments and issues raised.

The comments process

Periodic updates

Find out more about the assessment of new nuclear reactor designs in our periodic updates.

GDA update reports