The Office for Nuclear Regulation (ONR) has informed Westinghouse that it has agreed to close a ‘regulatory issue’ raised against its AP1000 reactor design. The regulatory issue, opened in February 2010 by ONR’s predecessor organisation (HSE’s Nuclear Directorate) concerned the AP1000’s civil structures, which were assessed by the regulator as part of the Generic Design Assessment, run jointly by ONR and the Environment Agency.


