Office for Nuclear Regulation


ONR reports and information

Regulatory reports


Fukushima reports and associated news as well as information about 'Stress Tests' carried out in the wake of events at Fukushima.

Freedom of Information releases

IRRS mission reports

Intervention Records

Intervention Records (IRs) are documents that explain what ONR has done on the sites we regulate when we make inspection visits.

They also record our findings and any significant actions we require the site operator to carry out in order to improve matters if appropriate.

The Office for Nuclear Regulation aims to be open and transparent and as part of this, we want to help all of our stakeholders, including the public, understand our work and engage with us about it.


Date Site / Nuclear site licence number / company / document description Report title Related reports
05/2015 N/A Use of UK Climate Projections 2018 (UKCP18) by GB nuclear industry (Rev 1, May 2020) None
07/2020 AR-19-089 Nuclear Decommissioning Authority – Implementation of ‘One NDA’ Handbook. Preliminary Intervention Findings None
2018 revision Computer software Licensing of safety critical software for nuclear reactors
Common position of international nuclear regulators and authorised technical support organisations
07/2021 ENSREG ENSREG Topical Peer Review on Ageing Management - Status of Actions from the UK National Action Plan None
12/2017 ENSREG ENSREG Topical Peer Review on Ageing Management - United Kingdom National Assessment Report None
05/2015 N/A Chief Nuclear Inspector's Technical Advisory Panel on accidental aircraft crash hazard assessment None
12/2009 J value report Review of the J-value literature Final report  None
1992 revision N/A The tolerability of risk from nuclear power stations None