Component fragility research program
Description
To demonstrate how high-level'' qualification test data can be used to estimate the ultimate seismic capacity of nuclear power plant equipment, we assessed in detail various electrical components tested by the Pacific Gas Electric Company for its Diablo Canyon plant. As part of our Phase I Component Fragility Research Program, we evaluated seismic fragility for five Diablo Canyon components: medium-voltage (4kV) switchgear; safeguard relay board; emergency light battery pack; potential transformer; and station battery and racks. This report discusses our Phase II fragility evaluation of a single Westinghouse Type W motor control center column, a fan cooler motor controller, and … continued below
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Pages: (129 p)
Creation Information
Tsai, N.C.; Mochizuki, G.L.; Holman, G.S. (NCT Engineering, Inc., Lafayette, CA (USA) & Lawrence Livermore National Lab., CA (USA)) November 1, 1989.
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Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering
Place of Publication: United States
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NCT Engineering, Inc., Lafayette, CA (USA)
Place of Publication: United States
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Lawrence Livermore National Lab., CA (USA)
Place of Publication: United States
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Description
To demonstrate how high-level'' qualification test data can be used to estimate the ultimate seismic capacity of nuclear power plant equipment, we assessed in detail various electrical components tested by the Pacific Gas Electric Company for its Diablo Canyon plant. As part of our Phase I Component Fragility Research Program, we evaluated seismic fragility for five Diablo Canyon components: medium-voltage (4kV) switchgear; safeguard relay board; emergency light battery pack; potential transformer; and station battery and racks. This report discusses our Phase II fragility evaluation of a single Westinghouse Type W motor control center column, a fan cooler motor controller, and three local starters at the Diablo Canyon nuclear power plant. These components were seismically qualified by means of biaxial random motion tests on a shaker table, and the test response spectra formed the basis for the estimate of the seismic capacity of the components. The seismic capacity of each component is referenced to the zero period acceleration (ZPA) and, in our Phase II study only, to the average spectral acceleration (ASA) of the motion at its base. For the motor control center, the seismic capacity was compared to the capacity of a Westinghouse Five-Star MCC subjected to actual fragility tests by LLNL during the Phase I Component Fragility Research Program, and to generic capacities developed by the Brookhaven National Laboratory for motor control center. Except for the medium-voltage switchgear, all of the components considered in both our Phase I and Phase II evaluations were qualified in their standard commercial configurations or with only relatively minor modifications such as top bracing of cabinets. 8 refs., 67 figs., 7 tabs.
Physical Description
Pages: (129 p)
Notes
NTIS, PC A07/MF A01 - GPO; OSTI; INIS
Subjects
Keywords
- Acceleration
- Accidents
- Circuit Breakers
- Comparative Evaluations
- Data Analysis
- Diablo Canyon-1 Reactor
- Diablo Canyon-2 Reactor
- Electric Motors
- Electrical Equipment
- Equipment
- Equipment Protection Devices
- Fault Tree Analysis
- Frequency Analysis
- Mathematical Models
- Mechanical Structures
- Motors
- Nuclear Facilities
- Nuclear Power Plants
- Power Plants
- Power Reactors
- Public Health
- Pwr Type Reactors
- Reactor Accidents
- Reactor Components
- Reactor Safety
- Reactors
- Relays
- Reliability
- Research Programs
- Risk Assessment
- Safety
- Seismic Effects
- Stress Analysis
- System Failure Analysis
- Systems Analysis
- Thermal Power Plants
- Water Cooled Reactors
- Water Moderated Reactors 220900* -- Nuclear Reactor Technology-- Reactor Safety
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- Other: TI90002985
- Report No.: NUREG/CR-5470
- Report No.: UCID--21820
- Grant Number: W-7405-ENG-48
- Digital Object Identifier: https://doi.org/10.2172/5455630
- Office of Scientific & Technical Information Report Number: 5455630
- Archival Resource Key: ark:/67531/metadc1063992
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- November 1, 1989
Added to The UNT Digital Library
- Feb. 4, 2018, 10:51 a.m.
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- April 27, 2018, 3:58 p.m.
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Tsai, N.C.; Mochizuki, G.L.; Holman, G.S. (NCT Engineering, Inc., Lafayette, CA (USA) & Lawrence Livermore National Lab., CA (USA)). Component fragility research program, report, November 1, 1989; United States. (https://digital.library.unt.edu/ark:/67531/metadc1063992/: accessed June 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.