Evaluations of CRBRP thermal margin beyond the design base

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5450861

Schornhorst, J. R.; Strawbridge, L. E.; Bradbury, P.

The thermal loads and radiological consequences that could result from a hypothetical core disruptive accident with whole core involvement were evaluated. Since the in-vessel margins may not prevent melt-through of the reactor vessel and guard vessel, emphasis has been placed on providing margins external to the reactor vessel and guard vessel to mitigate the radiological consequences of an HCDA. To evaluate the plant thermal and radiological margins, the release of the entire core, blankets and primary sodium into the reactor cavity was considered. Design requirements have been placed on plant components and structures to assure that containment integrity can be maintained without venting for at least 24 hours. Features are also included to provide long term mitigation of HCDA consequences. Based on the thermal and radiological evaluations considering the CRBRP features it is concluded that the radiological consequences of a hypothetical core disruptive accident would be enveloped by those for light water reactors for events beyond the design base.

• Research Organization: Westinghouse Electric Corp., Madison, Pa. (USA). Advanced Reactors Div.
• DOE Contract Number: EY-76-C-15-2395
• OSTI ID: 5450861
• Report Number(s): CONF-771108-3
• Country of Publication: United States
• Language: English

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