Energia i regulacje · 13/11/2003

Notice of Opportunity To Comment on Model Safety Evaluation on Technical Specification Improvement Regarding Revision to the Completion Time in STS 3.6.3, “Containment Isolation Valves” for Combustion Engineering Pressurized Water Reactors Using the Consolidated Line Item Improvement Process

Notice is hereby given that the staff of the Nuclear Regulatory Commission (NRC) has prepared a model safety evaluation (SE) relating to changes to the completion time in Standard Technical Specifications (STS) 3.6.3 "Containment Isolation Valves (Atmospheric and Dual)." The proposed change to the Technical Specifications (TS) would extend to 7 days the completion time to isolate the affected penetration flow path when selected containment isolation valves (CIVs) are inoperable in either a penetration flow path with two CIVs or in a penetration flow path with one CIV in a closed system. This change is based on analyses provided in a generic topical report submitted by the former Combustion Engineering Owner's Group (CEOG; now incorporated into the Westinghouse Owners Group). The Owners Group participants in the Technical Specification Task Force (TSTF) proposed this change to the STS in Change Traveler TSTF-373, Revision 2. This notice also includes a model no significant hazards consideration (NSHC) determination relating to this matter. The purpose of these models is to permit the NRC to efficiently process amendments to incorporate this change into plant-specific TS for Combusti