Development of an Outage Heat Sink Program for Bruce NGS A

Abstract

CANDU philosophy has always included maintaining an alternate heat sink for a high power reactor, in case the primary heat transport system became ineffective. The risk of core damage due to loss of heat sink from a low power state was considered to be remote. As international and domestic experience grew, it was recognized that the risk of core damage due to low of the low power heat sink might be as great as for the high power case. This paper describes the development of a user oriented alternate heat sink manual at Bruce NGS "A" which will minimize risk due to loss of heat sink from the low power state.