Study of operational risk-based configuration control

Technical Report · Thu Aug 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5489844· OSTI ID:5489844

Vesely, W E ^[1]; Samanta, P K; Kim, I S ^[2]

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1. Science Applications International Corp., Dublin, OH (United States)
2. Brookhaven National Lab., Upton, NY (United States)

This report studies aspects of a risk-based configuration control system to detect and control plant configurations from a risk perspective. Configuration control, as the term is used here, is the management of component configurations to achieve specific objectives. One important objective is to control risk and safety. Another is to operate efficiently and make effective use of available resources. PSA-based evaluations are performed to study configuration to core-melt frequency and core-melt probability for two plants. Some equipment configurations can cause large core-melt frequency and there are a number of such configurations that are not currently controlled by technical specifications. However, the expected frequency of occurrence of the impacting configurations is small and the core-melt probability contributions are also generally small. The insights from this evaluation are used to develop the framework for an effective risk-based configuration control system. The focal points of such a system and the requirements for tools development for implementing the system are defined. The requirements of risk models needed for the system, and the uses of plant-specific data are also discussed. 18 refs., 25 figs., 10 tabs.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Systems Research; Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USNRC; Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5489844
• Report Number(s): NUREG/CR-5641; BNL-NUREG-52261; ON: TI91017295
• Country of Publication: United States
• Language: English

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