Executive summary
Date(s) of inspection:
November 2025
Aim of inspection
- To sample evidence of the adequacy of the arrangements for Heysham 1 Reactor 2 Statutory Outage in relation to Mechanical Engineering activities.
- To provide evidence to inform the ONR decision relating to the issue of a Licence Instrument for a Consent for return to service of Heysham 1 Reactor 2, on completion of the work.
Subject(s) of inspection
- LC28 - Examination, inspection, maintenance and testing - Rating: Green
Key findings, inspector's opinions and reasons for judgement made
Site Licence Condition 30 requires EDF Nuclear Generation Limited to periodically shutdown. This is for examination, inspection, maintenance and testing of equipment important to nuclear safety.
This intervention was a Mechanical Engineering Licence Condition 28 compliance inspection. The intervention was at EDF Energy Nuclear Operations Heysham 1 during R2 Outage 028.
This report provides evidence to inform the Office for Nuclear Regulation’s decision regarding the issue of a Licence Instrument for consent to return to service for Heysham 1 Reactor 2. This is in accordance with Licence Condition 30.
Conclusion
Based on my sample of the Gas Turbine hall, Gas Circulator Maintenance Facility, and Main Boiler Feed Pump outage activities, I consider that HYA has adequately demonstrated its Mechanical Engineering Examination, Inspection, Maintenance, and Testing implementation, therefore I consider the licensee has adequately demonstrated compliance with Licence Condition 28.
From my sample of evidence, including the plant walkdown, I have made a minor regulatory observation and offered minor regulatory advice relating to workshop standards. I have not identified anything related to Mechanical Engineering that requires a formal regulatory issue. I have not identified anything that would prevent Heysham 1 Reactor 2 from returning to service, therefore I judge that a GREEN inspection rating is appropriate