Office for Nuclear Regulation

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Revised resolution plans for Westinghouse AP1000 design published

12 March, 2015

The Office for Nuclear Regulation (ONR) and the Environment Agency have today published revised resolution plans in response to 51 outstanding GDA Issues for the AP1000 reactor design.

The Westinghouse AP1000 reactor design re-entered the GDA process in June 2014 and following a period of remobilisation, technical assessment work commenced in January 2015. We have now agreed revised resolution plans from Westinghouse for the 51 outstanding GDA issues. These issues will need to be resolved before ONR and Environment Agency can make a decision on whether to issue a Design Acceptance Confirmation and Statement of Design Acceptability for the AP1000 reactor design. Westinghouse is aiming to complete GDA in early 2017 but this will be dependent on the timely delivery of high quality documentation for regulatory assessment.