Handbook of methods for risk-based analysis of technical specifications

摘要: Technical Specifications (TS) requirements for nuclear power plants define the Limiting Conditions Operations (LCOs) and Surveillance Requirements (SRs) to assure safety during operation. In general, these are based on deterministic analyses engineering judgments. Improvements in facilitated by availability of plant-specific Probabilistic Risk Assessments (PRAs). The US Nuclear Regulatory Commission (USNRC) Office Research sponsored research develop systematic, risk-based methods improve various aspects TS requirements. A handbook summarizing such approaches has been completed 1994. It is expected that this will provide valuable input NRC`s present work developing guidance using PRA risk-informed regulation. addresses reliability evaluating allowed outage times (AOTs), action statements requiring shutdown where risk may be substantial, surveillance test intervals (STIs), managing plant configurations, scheduling maintenance.