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2 July

2025

Welcome to ONR news

Hello everyone.


Welcome to the latest edition of ONR News, keeping you updated about our work as the UK’s nuclear regulator for safety, security and safeguards.

Rachel Grant

We’re delighted that Mike Finnerty has taken up his role this week as our new Chief Executive/Chief Nuclear Inspector, bringing a range of experience in the nuclear sector, most recently at the International Atomic Energy Agency.


You will certainly be hearing more from Mike in this publication in the months and years ahead.   


In spring we also welcomed Dr Nicki Crauford as our new permanent Chair, and in this edition she shares her reflections of her first four-months in post.


There has been lots of talk about nuclear in recent weeks - with major government announcements on its ambitions for the sector as part of the Spending Review.


This included the £14.2bn investment for Sizewell C, more than £6bn of investment to the nuclear submarine industrial base in support of the Strategic Defence Review, and the announcement that the Rolls Royce SMR has been selected as the preferred bidder in Great British Nuclear’s SMR competition.  


We are keenly aware of the government's priorities and welcome the clarity this provides for our regulatory planning.


We recognise our role in supporting economic growth which we maintain through our enabling approach to regulation and being open to innovative and cost-effective ways of working.


Meanwhile, our work continues with the government’s nuclear regulatory taskforce. The open and honest conversations have been a key feature of the process so far and we share a joint ambition to ensure our nuclear regulation is as efficient and effective as it can be.


You may have seen that in May we published our Interim Strategy Statement which looks forward to 2030 and keeps nuclear safety, and the protection of workers and the public, at the heart of everything we do.


We also want to promote stakeholder confidence in our work and continue to develop risk-informed and well-targeted regulation which adds value and enables the industry to safely achieve its goals.


This edition includes articles about how this enabling regulatory approach has helped in the completion of Sizewell A turbine hall demolition project and a new safety culture measurement tool for nuclear organisations.


As always, if you have any comments about ONR, any of the topics included in this newsletter, please get in touch via contact@onr.gov.uk.


Best wishes


Rachel Grant

Director of Strategy and Corporate Affairs

A personal note from Dr Nicki Crauford: Reflections on my first four months at ONR

After nearly four months in the role of Chair, I wanted to share my initial reflections about the UK’s nuclear sector and thank the industry stakeholders I've met so far.

Read more about Nicki's first few months at ONR

Our new Chief Executive/Chief Nuclear Inspector arrives 

We are pleased to welcome Mike Finnerty, our new Chief Executive and Chief Nuclear Inspector, who took up his post yesterday (1 July).

Read more about Mike's new role

New safety culture measurement tool developed for nuclear industry

We’ve launched a new software tool for nuclear organisations to accurately measure their safety cultures and benchmark their results, helping them identify strengths and opportunities for improvement.

Read more about this new software tool

Enabling regulation helps completion of Sizewell A turbine hall demolition project

We have welcomed the end of an 18-month project to fully demolish the turbine hall at Sizewell A nuclear power station, which was completed ahead of schedule, with innovative techniques speeding up conventional demolition methods.

Read more about this project

Our assessment was not bananas!

We’ve clarified a recent online article which made a series of claims about our assessment of the Hitachi-GE Nuclear Energy UK advanced boiling water reactor design.

Read our clarification in full

Mark appointed a CBE

We’re delighted that Mark Foy, our outgoing Chief Executive and Chief Nuclear Inspector, was appointed Commander of the Order of the British Empire (CBE) in recognition of his service to nuclear safety and security regulation.

Dr Nicki Crauford, our Chair, said: “I’m delighted that Mark’s contributions to maintaining nuclear safety and security across our country has been recognised by His Majesty. 

“As Chief Executive and Chief Nuclear Inspector, Mark has worked tirelessly in ensuring the safe and secure operation of the nation's nuclear facilities while advancing our regulatory excellence.”

New nuclear security training initiative to enhance industry expertise

We are partnering with Global Nuclear Security Partners (GNSP) and Ubique Risk Management (URM) to develop specialist nuclear security training for Great Britain’s nuclear industry. 


In partnership with GNSP and URM, we will design and deliver training programmes for industry professionals, aligned with our security and assessment principles (SyAPs).


The initiative forms part of a broader programme to update the SyAPs, ensuring the nuclear security regulatory framework reflects relevant good practice.

Renewed MoU between nuclear and rail regulators

We have signed a revised Memorandum of Understanding (MoU) with the Office of Rail and Road to clarify responsibilities when radioactive materials are being transported by rail.


The MoU defines and documents the regulator's roles and responsibilities and develops a shared and collective understanding between them about their mutual communication, liaison, collaboration and working arrangements.

Higher Activity Waste Management Guidance consultation

We’ve launched a consultation to gather feedback from interested parties on the scope, clarity and technical content of the Higher Activity Waste Management Guidance.


It has been ten years since the last major update to the joint guidance issued by ourselves, the Environment Agency, the Scottish Environment Protection Agency and Natural Resources Wales.


To take part in the consultation please complete our online questionnaire by 22 August 2025.

Updated incident notification process

We’ve refreshed our incident notification processes and guidance following recent revisions to the Ministerial Reporting Criteria (MRC) agreed with the Department for Energy Security and Net Zero.


Key updates include streamlined documentation with standardised titles, clearer submission routes via our notification portals, and easy access to MRC information on the Notify ONR webpage.


Our incident notification categories and criteria remain unchanged, and you should continue to report RIDDOR incidents on ONR-enforced premises directly to us, not the Health and Safety Executive, as has been required since April 2024.

Our mission is to protect society by securing safe nuclear operations

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Any feedback?

We'd love to hear from you: contact@onr.gov.uk or contact us via our website.