Review of PWR-related thermal-shock studies

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5770756

Cheverton, R D; Iskander, S K; Ball, D G

Flaw behavior trends associated with pressurized-thermal-shock (PTS) loading of PWR pressure vessels have been under investigation at ORNL for approx.12 years. During that time, eight thermal-shock experiments with thick-walled steel cylinders were conducted as a part of the investigations. These experiments demonstrated, in good agreement with linear elastic fracture mechanics (LEFM), crack initiation and arrest, a series of initiation-arrest events with deep penetration of the wall, long crack jumps without significant dynamic effects at arrest, arrest in a rising K/sub I/ field, extensive surface extension of an initially short and shallow flaw, and warm prestressing with K/sub I/ equal to or less than 0. This information was used in the development of a fracture-mechanics model that is being used extensively in the evaluation of the PTS issue.

• Research Organization: Oak Ridge National Lab., TN (USA); Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5770756
• Report Number(s): CONF-860675-2; ON: TI86011972
• Country of Publication: United States
• Language: English

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