Probabilistic assessment of the primary-coolant-loop pipe-fracture due to fatigue crack growth for a PWR plant
Conference
·
OSTI ID:6349595
The work reported herein assesses the probability of a double-ended guillotine break of the hot leg, cold leg and cross-over line (for the purpose of this paper we defined it as a large LOCA) of a PWR plant subjected to the loads caused by plant transients and earthquakes. The work employs a fracture mechanics based fatigue model to propagate cracks from an initial flaw distribution. Flaw size and aspect ratio, material properties, operating transient and seismic stress histories, pre-service and in-service inspections as well as leak defections are considered random variables to be input into the fatigue crack growth fracture mechanics model. A brief description of the model and interrelationship between various steps are discussed.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6349595
- Report Number(s):
- UCRL-86201; CONF-810825-2; ON: TI85016707
- Country of Publication:
- United States
- Language:
- English
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ACCIDENTS
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FLUID MECHANICS
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HEAT TRANSFER
HYDRAULICS
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MATERIALS
MECHANICAL PROPERTIES
MECHANICS
PIPES
PRIMARY COOLANT CIRCUITS
PROBABILITY
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR MATERIALS
REACTOR SAFETY
REACTORS
RISK ASSESSMENT
SAFETY
SEISMIC EFFECTS
SHUTDOWNS
WATER COOLED REACTORS
WATER MODERATED REACTORS