Failure mode analysis using state variables derived from fault trees with application
Fault Tree Analysis (FTA) is used extensively to assess both the qualitative and quantitative reliability of engineered nuclear power systems employing many subsystems and components. FTA is very useful, but the method is limited by its inability to account for failure mode rate-of-change interdependencies (coupling) of statistically independent failure modes. The state variable approach (using FTA-derived failure modes as states) overcomes these difficulties and is applied to the determination of the lifetime distribution function for a heat pipe-thermoelectric nuclear power subsystem. Analyses are made using both Monte Carlo and deterministic methods and compared with a Markov model of the same subsystem.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6238023
- Report Number(s):
- LA-UR-81-2595; CONF-810905-5; ON: DE81030239
- Country of Publication:
- United States
- Language:
- English
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DIRECT ENERGY CONVERTERS
FAILURE MODE ANALYSIS
FAULT TREE ANALYSIS
HEAT PIPES
MARKOV PROCESS
MOBILE REACTORS
MONTE CARLO METHOD
NESDPS Office of Nuclear Energy Space and Defense Power Systems
POWER REACTORS
REACTORS
RELIABILITY
SPACE POWER REACTORS
STOCHASTIC PROCESSES
SYSTEM FAILURE ANALYSIS
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THERMOELECTRIC GENERATORS