Assessing new nuclear power station designs: Generic design assessment of Hitachi-GE Nuclear Energy Limited's UK Advanced Boiling Water Reactor

Closed 3 Mar 2017

Opened 12 Dec 2016

Results Updated 13 Jul 2017

The Environment Agency and Natural Resources Wales have published a compilation of responses received to this consultation.

In their consultation plan the regulators said they would publish all the responses made to them in April. Because of government guidelines about publishing information in the pre-election period, publication of this report was postponed until today.

This report (see document below) is a collation of responses received to the consultation via the online e-consultation tool, email, post, national stakeholder event and local events near Wylfa Newydd and Oldbury. It does not contain the regulators’ response to the points raised by individuals or organisations, as these will be included in the final decision document.

You can also view the responses to this consultation in Welsh.



You can also view and respond to this consultation in Welsh.

New nuclear power stations are an important part of the government’s plans for generation of secure low carbon electricity.

As regulators of the nuclear industry, the Office for Nuclear Regulation (ONR), the Environment Agency and Natural Resources Wales are working together to make sure any new nuclear power stations built in the UK meet high standards of safety, security, environmental protection and waste management.

Hitachi-GE Nuclear Energy Ltd (Hitachi-GE), a major provider of nuclear technologies, has developed the ABWR plant and used it in Japan, and has now submitted the UK ABWR design to the UK nuclear regulators for generic design assessment (GDA).

GDA is the process that allows us to begin scrutinising new nuclear power station designs well in advance of construction starting. This means that we can identify any potential design issues at an early stage and ask the reactor design company to address them, so helping to avoid potential costly and time consuming modifications during construction.

The Environment Agency and Natural Resources Wales consulted and asked for your views on their assessment of the UK Advanced Boiling Water Reactor (UK ABWR) nuclear power station design between 12 December 2016 and 3 March 2017.

Hitachi-GE's UK - Advanced Boiling Water Reactor

Why We Are Consulting

This consultation asked for  views on our preliminary conclusions following our detailed assessment of the UK ABWR new nuclear power station design, and on the environmental aspects of the design.
Our consultation does not relate to a specific site, even though the UK ABWR is proposed at two sites in the UK. It is not about the need for nuclear power, the siting of nuclear power stations, or the safety and security of the design.

We can all help to protect and improve the environment by being actively involved. We have deliberately made the GDA process open, transparent and consultative and we would like people to understand our role, what we are doing and why it is important.

This is a public consultation and we welcome everyone’s views. We want to hear from the public, the energy industry, academics with an interest in nuclear power, energy or the environment, non-governmental organisations (NGOs) and any other organisation or public body.

We would like to find out your views on:

  • the environmental aspects of the design
  • the Environment Agency’s and Natural Resources Wales’s preliminary conclusions following detailed assessment of the environmental aspects of the UK ABWR nuclear power station design.

What Happens Next

We will carefully consider all the responses to the consultation and complete our detailed assessment before we make our decision on whether or not to issue a statement, or interim statement, of design acceptability for the UK ABWR.

We will summarise the responses to our consultation, issues raised and our views on those issues and publish it on our website.

We are targeting publishing our final conclusions in our 'decision document' in December 2017.


  • NGOs
  • Members of the public
  • Elected representatives, including MPs
  • Local councils
  • Academics
  • The nuclear industry


  • Business and industry
  • Fishing and boating
  • Habitats and wildlife
  • Nuclear
  • Environmental permitting