Safety Program Plan for the Gas-Cooled Fast Reactor

Technical Report · Mon Dec 01 04:00:00 EST 1980

DOI:https://doi.org/10.2172/6708770· OSTI ID:6708770

Torri, A.; Boyack, B. C.; Kelley, Jr., A. P.

The GCFR Safety Program has developed and adopted a probabilistic risk framework. This report defines a risk goal and quantifies the defense-in-depth concept by defining distinct lines of protection (LOPs). Each LOP has a quantitative frequency and consequence goal which is consistent with the overall risk goal. LOPs -1 through -3 are dedicated to preventing accidents. The normal operating systems constitute LOP-1. LOP-2 comprises the dedicated safety systems, and LOP-3 includes a new LOP made up of inherent safety features to prevent unusual events from progressing into severe accidents. LOPs -1 and -2 are design features normally in current nuclear power plants. LOPs -4 through -6 are dedicated to mitigating the consequences of accidents if LOPs -1 through -3 fail and lead to core melting. LOP-4 exploits the prestressed concrete reactor vessel (PCRV) as a barrier to contain accidents and to mitigate the release of activity. LOP-5 assures that the containment serves as an effective barrier against releasing activity to the environment if the LOP-4 barrier is postulated to fail. LOP-6 quantitatively reduces the consequences due to site and environmental effects, including emergency planning.

• Research Organization: General Atomic Co., San Diego, CA (USA); Helium Breeder Associates, San Diego, CA (USA)
• DOE Contract Number: AT03-76SF71023
• OSTI ID: 6708770
• Report Number(s): GA-A-16138
• Country of Publication: United States
• Language: English

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