Energia i regulacje · 17.01.2013

Proposed Models for Plant-Specific Adoption of Technical Specifications Task Force Traveler TSTF-426, Revision 5, “Revise or Add Actions To Preclude Entry Into LCO 3.0.3-RITSTF Initiatives 6B & 6C”

The U.S. Nuclear Regulatory Commission (NRC) is requesting public comment on the proposed model safety evaluation (SE) for plant- specific adoption of Technical Specifications (TS) Task Force (TSTF) Traveler TSTF-426, Revision 5, "Revise or Add Actions to Preclude Entry into [Limiting Condition for Operation] LCO 3.0.3--RITSTF Initiatives 6B & 6C." The proposed change revises the Standard Technical Specification (STS), NUREG-1432, "Standard Technical Specifications Combustion Engineering Plants." Specifically, the proposed change revises various TSs to add a Condition for loss of redundant features representing a loss of safety function for a system or component included within the scope of the plant TSs. It would replace Required Actions requiring either a default shutdown or explicit LCO 3.0.3 entry with a Required Action based on the risk significance for the system's degraded condition.