NUCLEAR POWER PLANT RISK-INFORMED SURVEILLANCE FREQUENCY CONTROL PROGRAM IMPLEMENTATION AT THE DUKE CATAWBA NUCLEAR PLANT WITH A FOCUS ON INSTRUMENTATION AND CONTROL SYSTEMS

摘要

This paper summarizes an updated process for risk-informed surveillance frequency control program (SFCP) implementation at the Catawba Nuclear Power Plant in the past year. This program includes selection and prioritization of specific target surveillance test interval extensions: and development, review, and implementation of surveillance test risk informed documented evaluation (STRIDE) packages designed to support extension of conventional surveillance requirement test intervals, in accordance with "Risk-Informed Technical Specifications Initiative 5b. Risk-Informed Method for Control of Surveillance Frequencies. Industry Guideline." NEI 04-10. Revision 1 [1]. The scope of work associated with STRIDE development includes probabilistic risk assessment (PRA) case studies, deterministic assessment (DA) evaluations, and, where required, instrument drift evaluation (IDE). The STRIDE implementation efforts have also included support of independent decision-making panel (IDP) meetings at the implementing power stations and IDP member training. The purpose of this paper is to provide a presentation of a refined process for STRIDE development with a focus on instrumentation and control systems based on author experience, which includes support for the development of multiple STRIDE packages for the Catawba Nuclear Plant. This paper outlines a framework for practical implementation of an SFCP within the context of an integrated risk-informed performance-based regulation application program with emphasis on instrumentation and control systems.