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Conference Article: Reliability analysis of VHTR reserve shutdown system

Araki, T.; Sugawara, M.; Ikeda, T. (Toshiba Corp., Japan Atomic Energy Research Inst., Tokyo); Miyamoto, Y. (Japan Atomic Energy Research Inst., Tokyo)

Abstract

A reliability analysis of the reserve shutdown system of the VHTR (Very High Temperature Reactor) has been carried out by means of the fault tree method. The reserve shutdown system investigated in this paper is a rupture disc type. In this analysis, logic failure (the initiation signal system failure for the reserve shutdown system) and hardware failure are considered. Through this reliability analysis, the high reliability of the reserve shutdown system of the VHTR was verified. Furthermore we have obtained valuable information concerning how to improve the reliability of the reserve shutdown system of the VHTR.

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key words: auxiliary systems; failure mode analysis; reliability; scram; vhtr reactor; enriched uranium reactors; experimental reactors; gas cooled reactors; graphite moderated reactors; helium cooled reactors; htgr type reactors; power reactors; reactor shutdown; reactors; research and test reactors; shutdown; system failure analysis; systems analysis; thermal reactors
Reference:
Specialists' meeting on safety and accident analysis for gas-cooled reactors. Oak Ridge, TN (USA). 13-15 May 1985
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--358, pp:95-103