SPAR Model Structural Efficiencies

John Schroeder ; Dan Henry

关键词: efficiency;    Probabilistic Risk Assessment;    SPAR;    SPAR Models;   

DOI  :  10.2172/1082395
RP-ID  :  INL/EXT-13-28528
PID  :  OSTI ID: 1082395

美国|英语

来源: SciTech Connect

【 摘 要 】

The Nuclear Regulatory Commission (NRC) and the Electric Power Research Institute (EPRI) are supporting initiatives aimed at improving the quality of probabilistic risk assessments (PRAs). Included in these initiatives are the resolution of key technical issues that are have been judged to have the most significant influence on the baseline core damage frequency of the NRC???s Standardized Plant Analysis Risk (SPAR) models and licensee PRA models. Previous work addressed issues associated with support system initiating event analysis and loss of off-site power/station blackout analysis. The key technical issues were: ??? Development of a standard methodology and implementation of support system initiating events ??? Treatment of loss of offsite power ??? Development of standard approach for emergency core cooling following containment failure Some of the related issues were not fully resolved. This project continues the effort to resolve outstanding issues. The work scope was intended to include substantial collaboration with EPRI; however, EPRI has had other higher priority initiatives to support. Therefore this project has addressed SPAR modeling issues. The issues addressed are ??? SPAR model transparency ??? Common cause failure modeling deficiencies and approaches ??? Ac and dc modeling deficiencies and approaches ??? Instrumentation and control system modeling deficiencies and approaches