Document Control Desk US Nuclear Regulatory Commission

The purpose of this letter is to request formal NRC staff review and approval to extend the Type A containment integrated test interval as documented in the enclosed CEOG report WCAP-15691, "Joint Applications Report for Containment Integrated Leak Rate Test Interval Extension. " Three (3) bound copies of the proprietary report (WCAP-1 5691) and three (3) bound copies of the non-proprietary report (WCAP-15715) are enclosed for staff review. In addition, one unbound copy of the proprietary and the non-proprietary report are provided for entry into ADAMS. Westinghouse has determined that the information contained in WCAP-1 5691 is proprietary in nature. It is requested that this information be withheld from public disclosure in accordance with the provisions of 10 CFR 2.790 and be appropriately safeguarded. The reasons for the classification of this information as proprietary are delineated in the enclosed affidavit