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Title: Risk-informed inservice test activities at the NRC

Abstract

The operational readiness of certain safety-related components is vital to the safe operation of nuclear power plants. Inservice testing (IST) is one of the mechanisms used by licensees to ensure this readiness. In the past, the type and frequency of IST have been based on the collective best judgment of the NRC and industry in an ASME Code consensus process and NRC rulemaking process. Furthermore, IST requirements have not explicitly considered unique component and system designs and contribution to overall plant risk. Because of the general nature of ASME Code test requirements and non-reliance on risk estimates, current IST requirements may not adequately emphasize testing those components that are most important to safety and may overly emphasize testing of less safety significant components. Nuclear power plant licensees are currently interested in optimizing testing by applying resources in more safety significant areas and, where appropriate, reducing measures in less safety-significant areas. They are interested in maintaining system availability and reducing overall maintenance costs in ways that do not adversely affect safety. The NRC has been interested in using probabilistic, as an adjunct to deterministic, techniques to help define the scope, type and frequency of IST. The development of risk-informed IST programsmore » has the potential to optimize the use of NRC and industry resources without adverse affect on safety.« less

Authors:
; ;
Publication Date:
Research Org.:
American Society of Mechanical Engineers, New York, NY (United States)
OSTI Identifier:
402012
Report Number(s):
NUREG/CP-0152; CONF-9607103-
ON: TI96013645; TRN: 96:005268-0046
Resource Type:
Conference
Resource Relation:
Conference: 4. NRC/ASME symposium on valve and pump testing in nuclear power plants, Washington, DC (United States), 15-18 Jul 1996; Other Information: PBD: [1996]; Related Information: Is Part Of Proceedings of the 4th NRC/ASME symposium on valve and pump testing; PB: 719 p.
Country of Publication:
United States
Language:
English
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; 21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; REACTOR COMPONENTS; IN-SERVICE INSPECTION; RISK ASSESSMENT; COST BENEFIT ANALYSIS; NUCLEAR POWER PLANTS; TESTING; LICENSING REGULATIONS; US NRC

Citation Formats

Fischer, D, Cheok, M, and Hsia, A. Risk-informed inservice test activities at the NRC. United States: N. p., 1996. Web.
Fischer, D, Cheok, M, & Hsia, A. Risk-informed inservice test activities at the NRC. United States.
Fischer, D, Cheok, M, and Hsia, A. Sun . "Risk-informed inservice test activities at the NRC". United States. https://www.osti.gov/servlets/purl/402012.
@article{osti_402012,
title = {Risk-informed inservice test activities at the NRC},
author = {Fischer, D and Cheok, M and Hsia, A},
abstractNote = {The operational readiness of certain safety-related components is vital to the safe operation of nuclear power plants. Inservice testing (IST) is one of the mechanisms used by licensees to ensure this readiness. In the past, the type and frequency of IST have been based on the collective best judgment of the NRC and industry in an ASME Code consensus process and NRC rulemaking process. Furthermore, IST requirements have not explicitly considered unique component and system designs and contribution to overall plant risk. Because of the general nature of ASME Code test requirements and non-reliance on risk estimates, current IST requirements may not adequately emphasize testing those components that are most important to safety and may overly emphasize testing of less safety significant components. Nuclear power plant licensees are currently interested in optimizing testing by applying resources in more safety significant areas and, where appropriate, reducing measures in less safety-significant areas. They are interested in maintaining system availability and reducing overall maintenance costs in ways that do not adversely affect safety. The NRC has been interested in using probabilistic, as an adjunct to deterministic, techniques to help define the scope, type and frequency of IST. The development of risk-informed IST programs has the potential to optimize the use of NRC and industry resources without adverse affect on safety.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Conference:
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