HTGR Knowledge Base

Conference Article: Gas-cooled fast reactor safety - and overview and status of the U.S. program

Torri, A.; Buttemer, D.R. (General Atomic Co., San Diego, CA (USA))

Abstract

In the revised GCFR Safety Program Plan a quantitative risk limit line has been adopted to establish requirements for the safety related functions and systems. The risk limit line is derived from an interpretation of NRC established licensing requirements, including those for LMFBR's. Multiple barriers to the progression of accident sequences are defined in the form of six Lines of Protection (LOPs). LOPs-1 to 3 are dedicated to accident prevention and represent the normal operating systems, the dedicated safety systems and the inherent design features, respectively. LOPs-4 to 6 are dedicated to the mitigation of core melt accident consequences and include in-vessel accident containment, secondary containment integrity and radiological attenuation, respectively. Cumulative frequency limits and consequence limits are established for each LOP. Design features associated with each LOP are described and the results of supporting safety analyses are summarized.

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key words: containment systems; gcfr reactor; licensing regulations; planning; radiation protection; reactor accidents; reactor protection systems; reactor safety; reliability; risk analysis; accidents; breeder reactors; containment; epithermal reactors; fast reactors; fbr type reactors; gas cooled reactors; gcfr type reactors; law; reactors; regulations; safety
Reference:
International Atomic Energy Agency, Vienna (Austria). International Working Group on Gas-Cooled Reactors. Specialists meeting on gas-cooled reactor safety and licensing aspects, Lausanne, Switzerland, 1-3 September 1980. Summary report. Jan 1981
International Atomic Energy Agency, Vienna (Austria). International Working Group on High-Temperature Reactors.
IWGGCR--1, pp:51-57