Control room fire

where are the reliable instruments in regards to a control room fire? what makes them reliable?

B train in the remote shutdown panel

reliable due to isolators in their circuits

what actions are taken prior to evacuating the CR during a CR fire?

TRIP THE RX (SPTAs are not performed)

check power lowering

check all FSCEAs have inserted

initiate an MSIS to prevent SG overfill (90 second time critical action)

what actions are taken at the remote shutdown panel during a CR fire?

determine the status of PBB-S04, evaluate if B train is powered from off site, the EDG, or de-energized

how is pressure control maintained during a CR fire?

B class B/U PZR heaters controlled from RSP or with local breaker operation

control of the B aux spray valves

during a CR fire which AFW pump will be used?

AFW pump B will be used

what are the time critical actions associated with a CR fire?

90 seconds initiate an MSIS

5 minutes ADV disconnects in local

disable charging pumps A and E to prevent draining the VCT

(times taken from when VCT is isolated)

14 min for 3 pumps

22 min for 2 pumps

44 min for 1 pump