Events caused by external hazards
Events caused by at-initiator human failure events
Events in systems interfacing with RCS that could result in loss of coolant
Events caused by internal plant hazards
Equipment or human-induced events causing a breach in the RCS
Special initiators not falling into standard categories
Equipment or human-induced events that disrupt plant operation with intact RCB
These categories help in the organization and analysis of different types of events.
Remarks
IE-A5: INCLUDE in the spectrum of initiating event challenges these general categories