Probability of pipe fracture in the primary coolant loop of a PWR plant. Volume 6: failure mode analysis. Final report
Material properties and failure criteria were evaluated to assess the requirements for double-ended guillotine break in the primary coolant loop of the Zion Unit 1 pressurized water reactor. The properties of the 316 stainless steel piping materials were obtained from the literature. Statistical distributions of both the tensile and fracture properties at room and operating temperatures were developed. Yield and ultimate strength tensile properties were combined to estimate the material flow strength. The flow strength and fracture properties were used in the various failure models analyzed. Linear-elastic, elastic-plastic, and fully plastic fracture models were compared, and the governing fracture criterion was determined. For the particular case studied, the fully plastic flow requirement was found to be the controlling fracture criterion leading to a double-ended guillotine pipe break.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- OSTI ID:
- 5536489
- Report Number(s):
- NUREG/CR-2189-V6
- Country of Publication:
- United States
- Language:
- English
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COOLING SYSTEMS
CRACK PROPAGATION
EARTHQUAKES
ENERGY SYSTEMS
FAILURE MODE ANALYSIS
FAILURES
FATIGUE
HAZARDS
MECHANICAL PROPERTIES
PIPES
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REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
RUPTURES
SEISMIC EVENTS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
WATER COOLED REACTORS
WATER MODERATED REACTORS