NRC reactor operating experience data

Idaho National Laboratory (INL) has been providing technical assistance to the U.S. Nuclear Regulatory Commission Division of Risk Analysis in the Office of Nuclear Regulatory Research in the areas of data collection and reliability and risk calculation. INL collects, codes, assures the quality of, and maintains all reactor operating experience data necessary to support the Industry Trends Program and various risk-associated NRC studies requiring reactor operating experience data. The types of data collected under this effort include initiating event data, system reliability data, loss of offsite power data, common cause failure data, fire event data, and shutdown initiating event data. The data sources for this effort primarily consists of Licensee Event Reports (LERS), Event Notifications, and equipment failure reports provided by the Institute for Nuclear Power Operations (INPO). This data is analyzed and results published annually on the NRC website. The data is primarily used to support the NRC's standardized plant analysis risk (SPAR) models but also provides generic industry average values for use by the industry in their individual PSA models. This paper characterizes the types of data collected, the various uses of this data, and the methods of collection, storage and retrieval.