Enhancing the effectiveness of IST through risk-based techniques

Conference · Sun Dec 01 04:00:00 EST 1996

OSTI ID:402016

Floyd, S D

Current IST requirements were developed mainly through deterministic-based methods. While this approach has resulted in an adequate level of safety and reliability for pumps and valves, insights from probabilistic safety assessments suggest a better safety focus can be achieved at lower costs. That is, some high safety impact pumps and valves are currently not tested under the IST program and should be added, while low safety impact valves could be tested at significantly greater intervals than allowed by the current IST program. The nuclear utility industry, through the Nuclear Energy Institute (NEI), has developed a draft guideline for applying risk-based techniques to focus testing on those pumps and valves with a high safety impact while reducing test frequencies on low safety impact pumps and valves. The guideline is being validated through an industry pilot application program that is being reviewed by the U.S. Nuclear Regulatory Commission. NEI and the ASME maintain a dialogue on the two groups` activities related to risk-based IST. The presenter will provide an overview of the NEI guideline, discuss the methodological approach for applying risk-based technology to IST and provide the status of the industry pilot plant effort.

• Research Organization: American Society of Mechanical Engineers, New York, NY (United States)
• OSTI ID: 402016
• Report Number(s): NUREG/CP--0152; CONF-9607103--; ON: TI96013645
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
COST BENEFIT ANALYSIS
EFFICIENCY
IN-SERVICE INSPECTION
NUCLEAR POWER PLANTS
RISK ASSESSMENT
TESTING
VALVES
WATER PUMPS