Simplified Seismic Risk Methodology Applied to Generic Shutdown Heat Removal Issues for US Reactors.

摘要

The UC Nuclear Regulatory Commission has designated decay heat removal an Unresolved Safety Issue and has established a program (TAP A-45) to provide the technical basis for the resolution of decay heat removal issues. This paper describes a simplified seismic risk analysis methodology developed for TAP A-45 which is being applied to seven operating US plants. Results of these analyses are providing significant insight into the scope (and cost estimates) of retrofitting required to upgrade existing decay heat removal systems to a uniform level of seismic resistance. (ERA citation 10:036835)