Seismic Fragility of Nuclear Power Plant Components (Phase 2). Switchgear, I and C Panels (NSSS) and Relays.

摘要

As part of the Component Fragility Program which was initiated in FY 1985, three additional equipment classes have been evaluated. The report contains the fragility results and discussions on these equipment classes which are switchgear, I&C panels and relays. Both low and medium voltage switchgear assemblies have been considered and a separate fragility estimate for each type is provided. Test data on cabinets from the nuclear instrumentation/neutron monitoring system, plant/process protection system, solid state protective system and engineered safeguards test system comprise the BNL data base for I&C panels (NSSS). Fragility levels have been determined for various failure modes of switchgear and I&C panels, and the deterministic results are presented in terms of test response spectra.