3.5.2.1

Are suppression mechanisms used to reduce the number of consequence alarms?

This is especially important during equipment / process shutdown. Too many unimportant alarms divert the operators' attention from important alarms, and the operators may not have sufficient time to check all alarms and analyse the situation. Operators may thus miss critical alarms.

Comments/Recommendations

YA-711, point 22, p. 15, NUREG0700, point 4.1.3-3, p. 268
DC: May not be applicable to the DC, as there is a limited number of alarms