Selected Component Failure Rate Values from Fusion Safety Assessment Tasks

Abstract

This report is a compilation of component failure rate and repair rate values that can be used in magnetic fusion safety assessment tasks. Several safety systems are examined, such as gas cleanup systems and plasma shutdown systems. Vacuum system component reliability values, including large vacuum chambers, have been reviewed. Values for water cooling system components have also been reported here. The report concludes with the examination of some equipment important to personnel safety, primarily sensors to detect hazardous conditions such as oxygen deficiency, toxic gas atmospheres, combustible gases, and airborne releases of radioactivity. These data should be useful to system designers to calculate scoping values for the availability and repair intervals for their systems, and for probabilistic safety or risk analysts to assess fusion systems for safety of the public and the workers.iii SUMMARY This report is a compilation of component failure rate and repair rate values that can be used in magnetic fusion safety assessment tasks. The data were collected from literature reviews of fission, fusion, and other industrial equipment operating experiences,

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