重大事故（SA）等対処設備の運転中保全の考え方と課題
概要
It is important to improve both plant safety and plant operability simultaneously in nuclear power plants (NPPs). “On-Line Maintenance (OLM)” is one of solutions for this issue. This paper proposes “Application rules of OLMs for systems & components against Severe Accidents” based on IRIDM (Integrated Risk Informed Decision Making). In this proposal, implementation of OLMs should be decided by CDF (Core Damage Frequency) and CFF (Containment Failure Frequency) under system configuration during OLM, and completion time of OLMs should be decided by increment of CDF and CFF. Before implementation of OLMs in real NPPs, several issues should be discussed between utilities and NRA (Nuclear Regulatory Authority).
