Development and Verification of a SAPHIRE Risk Monitor for Chernobyl Type Reactors

Conference · Sat Jul 01 04:00:00 EDT 2006

OSTI ID:21021035

Vinnikov, Bronislav Iv ^[1]

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1. Russian Research Centre 'Kurchatov Institute', 1, Kurchatov Square, Moscow, (Russian Federation)

The first part of the paper presents results of the work, that was carried out in complete conformity with the Technical Assignment, which was developed by Leningrad Nuclear Power Plant. The initial scientific and technical information, contained into the In-Depth Safety Assessment Reports, was given to the author of the work. This information was received within the framework of the cooperation between the USA Pacific North-West National Laboratory (PNNL), Leningrad NPP and RRC 'Kurchatov Institute'. This information included graphic Fault Trees of Safety Systems and Auxiliary Technical Systems, Event Trees for the necessary number of Initial Events, and also information about failure probabilities of basic components of the nuclear unit. On the basis of this 'paper' information the author of the paper: - firstly, have developed an electronic version of the Data Base for failure probabilities of the components of technical systems; - secondly, have developed an the electronic versions of the necessary Fault Trees; - thirdly, have developed an electronic versions of the necessary Event Trees and, -at last, have carried out the linkage of the Event Trees. In the result there was received an Probabilistic Model of Leningrad NPP Unit 1. The Probabilistic Model is completely adapted to inclusion it into the Idaho (SAPHIRE) Risk Monitor. The second part of the paper results in analysis of fire consequences in various places of Leningrad NPP Unit 1. The computations were carried out with the help of the PSA-model, developed in SAPHIRE code format. On the basis of the computations the order of priority of implementation of fire prevention measures was established. Besides it was shown, that this PSA model may be applied for prompt monitoring of operational safety level of Leningrad NPP Unit 1. (author)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 21021035
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
COOPERATION
FAILURES
FAULT TREE ANALYSIS
FIRE PREVENTION
FIRES
HAZARDS
IMPLEMENTATION
INFORMATION
LWGR TYPE REACTORS
MONITORS
NUCLEAR POWER PLANTS
PROBABILISTIC ESTIMATION
PROBABILITY
RISK ASSESSMENT
SAFETY
VERIFICATION