Some Modifications in the Protection System of a BWR Caused by Fire Protection Requirements

摘要

A group of experts have been nominated by licensing authorities to work out fire protection recommendations for the first Austrian nuclear power plant. These requirements necessitated a number of modifications in design and lay-out of the reactor safety systems. In addition to the usual physical separation of redundant cable race-ways, it was necessary to modify electric circuits in those areas where redundances could not be fully separated by fire boundaries. Examples of such changes in the logic circuits of the reactor protection system and the instrumentation of the reactor shut-down system are described. (Atomindex citation 09:408574)