Westinghouse submits AP1000 changes to NRC

Westinghouse Electric Co. said on June 13 it was submitting Revision 19 of the AP1000 Design Control Document (DCD) to the U.S. Nuclear Regulatory Commission (NRC). The revision includes changes to address NRC comments raised during the confirmatory review of prior updates submitted in DCD Revision 18. The AP1000 is a two-loop, 1,154 MWe Generation III+ pressurized water reactor.

The submittal of DCD Rev. 19, along with updated shield building and containment vessel technical reports being provided to the NRC separately, provides resolution of all known NRC open confirmatory items associated with the pending Final Safety Evaluation Report needed for final rule making. Additionally, the changes incorporated into DCD Rev. 19 are clarifications and minor corrections, which have no safety significance.

Westinghouse said it performed systematic assessments of current AP1000 design finalization activities and applicable open items in the Westinghouse Corrective Action database to provide assurance there would be no material impact on the DCD or the NRC safety evaluation.

Additionally, the AP1000 Design Center Working Group (DCWG) performed an independent audit and assessment of Westinghouse in-process design activities, corrective action items and finalized calculation documents to provide additional assurances. The DCWG oversight did not identify any issue that would prevent issuance of DCD Rev. 19. Based on the results from these oversight and assessment activities, Westinghouse believes that Revision 19 of the AP1000 Design Control Document is ready for docketing in support of final rulemaking.

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