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Title: Seismic fragility of nuclear power plant components (Phase II)

Abstract

As part of the Component Fragility Program which was initiated in FY 1985, three additional equipment classes have been evaluated. This report contains the fragility results and discussions on these equipment classes which are switchgear, I and C panels and relays. Both low and medium voltage switchgear assemblies have been considered and a separate fragility estimate for each type is provided. Test data on cabinets from the nuclear instrumentation/neutron monitoring system, plant/process protection system, solid state protective system and engineered safeguards test system comprise the BNL data base for I and C panels (NSSS). Fragility levels have been determined for various failure modes of switchgear and I C panels, and the deterministic results are presented in terms of test response spectra. In addition, the test data have been evaluated for estimating the respective probabilistic fragility levels which are expressed in terms of a median value, an uncertainty coefficient, a randomness coefficient and an HCLPF value. Due to a wide variation of relay design and the fragility level, a generic fragility level cannot be established for relays. 7 refs., 13 figs., 12 tabs.

Authors:
; ; ;  [1]
  1. Brookhaven National Lab., Upton, NY (USA)
Publication Date:
Research Org.:
US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Div. of Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USNRC
OSTI Identifier:
7252519
Report Number(s):
NUREG/CR-4659-Vol.3; BNL-NUREG-52007-Vol.3
ON: TI90007785; TRN: 90-008632
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; NUCLEAR POWER PLANTS; REACTOR CONTROL SYSTEMS; REACTOR INSTRUMENTATION; REACTOR COMPONENTS; SEISMIC EFFECTS; DESIGN; RELAYS; SWITCHES; ACCELERATION; DAMPING; DATA BASE MANAGEMENT; ELECTRICAL EQUIPMENT; ENGINEERED SAFETY SYSTEMS; FAILURE MODE ANALYSIS; FRACTURE PROPERTIES; FREQUENCY ANALYSIS; MECHANICAL VIBRATIONS; MODIFICATIONS; PERFORMANCE TESTING; PROBABILISTIC ESTIMATION; REACTOR OPERATION; REACTOR SAFETY; RECOMMENDATIONS; RESPONSE FUNCTIONS; RISK ASSESSMENT; SENSITIVITY ANALYSIS; VARIATIONS; VULNERABILITY; CONTROL SYSTEMS; EQUIPMENT; FUNCTIONS; MANAGEMENT; MECHANICAL PROPERTIES; NUCLEAR FACILITIES; OPERATION; POWER PLANTS; SAFETY; SYSTEM FAILURE ANALYSIS; SYSTEMS ANALYSIS; TESTING; THERMAL POWER PLANTS; 220900* - Nuclear Reactor Technology- Reactor Safety; 220200 - Nuclear Reactor Technology- Components & Accessories; 990200 - Mathematics & Computers

Citation Formats

Bandyopadhyay, K K, Hofmayer, C H, Kassir, M K, and Pepper, S E. Seismic fragility of nuclear power plant components (Phase II). United States: N. p., 1990. Web. doi:10.2172/7252519.
Bandyopadhyay, K K, Hofmayer, C H, Kassir, M K, & Pepper, S E. Seismic fragility of nuclear power plant components (Phase II). United States. https://doi.org/10.2172/7252519
Bandyopadhyay, K K, Hofmayer, C H, Kassir, M K, and Pepper, S E. 1990. "Seismic fragility of nuclear power plant components (Phase II)". United States. https://doi.org/10.2172/7252519. https://www.osti.gov/servlets/purl/7252519.
@article{osti_7252519,
title = {Seismic fragility of nuclear power plant components (Phase II)},
author = {Bandyopadhyay, K K and Hofmayer, C H and Kassir, M K and Pepper, S E},
abstractNote = {As part of the Component Fragility Program which was initiated in FY 1985, three additional equipment classes have been evaluated. This report contains the fragility results and discussions on these equipment classes which are switchgear, I and C panels and relays. Both low and medium voltage switchgear assemblies have been considered and a separate fragility estimate for each type is provided. Test data on cabinets from the nuclear instrumentation/neutron monitoring system, plant/process protection system, solid state protective system and engineered safeguards test system comprise the BNL data base for I and C panels (NSSS). Fragility levels have been determined for various failure modes of switchgear and I C panels, and the deterministic results are presented in terms of test response spectra. In addition, the test data have been evaluated for estimating the respective probabilistic fragility levels which are expressed in terms of a median value, an uncertainty coefficient, a randomness coefficient and an HCLPF value. Due to a wide variation of relay design and the fragility level, a generic fragility level cannot be established for relays. 7 refs., 13 figs., 12 tabs.},
doi = {10.2172/7252519},
url = {https://www.osti.gov/biblio/7252519}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1990},
month = {Thu Feb 01 00:00:00 EST 1990}
}