Diablo Canyon internal events PRA (Probabilistic Risk Assessment) review: Methodology and findings

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6051180

Fitzpatrick, R G; Bozoki, G ^[1]; Sabek, M ^[2]

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1. Brookhaven National Lab., Upton, NY (USA)
2. Atomic Energy Authority, Cairo (Egypt)

The review of the Diablo Canyon Probabilistic Risk Assessment (DCRPA) incorporated some new and innovative approaches. These were necessitated by the unprecedented size, scope and level of detail of the DCRPA, which was submitted to the NRC for licensing purposes. This paper outlines the elements of the internal events portion of the review citing selected findings to illustrate the various approaches employed. The paper also provides a description of the extensive and comprehensive importance analysis applied by BNL to the DCRPA model. Importance calculations included: top event/function level; individual split fractions; pair importances between frontline-support and support-support systems; system importance by initiator; and others. The paper concludes with a brief discussion of the effectiveness of the applied methodology. 3 refs., 5 tabs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: USNRC
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6051180
• Report Number(s): BNL-NUREG-45602; CONF-9010185-22; ON: DE91007091; TRN: 91-004715
• Resource Relation: Conference: 18. water reactor safety information meeting, Gaithersburg, MD (USA), 22-24 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
DIABLO CANYON-1 REACTOR
RISK ASSESSMENT
DIABLO CANYON-2 REACTOR
FAILURE MODE ANALYSIS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR SAFETY
SYSTEMS ANALYSIS
ACCIDENTS
POWER REACTORS
PWR TYPE REACTORS
REACTORS
SAFETY
SYSTEM FAILURE ANALYSIS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled