00:04:52 Intermediate Closed Cooling Pump (IC-P-1A) started.
(0405:29)
00:04:58 First alarm indication received that letdown had been secured.
(0405:35)
00:05:06 Pressurizer level stopped its sharp increase at 376 and began
(0405:43)
to turn down. It reachad a minimum of 372 inches and then
started back up at 5 minutes, 21 seconds into the transient.
00:05:15 Condensate Booster Pump B (CO-P-2B) tripped.
(0405:52)
00:05:50 Reactor Coolant System pressure stopped its sharp decrease and began
(0406:27)
Approximate to turn up. Minimum value reached was appoximately 1350 psig.
00:05:54 Pressurizer level increased beyond the range of the instrument
(0406:31)
indication.
00:06:58 Letdown f1ow of 71.4 gallons per minute was re-established.
(0407:35)
00:07:31 Reactor Building Sump Pump A (WDL-P-2A) started.
(0408:06)
00:08:00 Emergency Feedwater Block Valves(EF-V12A and EF-V12B) were opened.
(0408:37)
Approximate
00:08:15 Reactor Coolant System hot leg and cold leg temperatures began to
(0408:52)
decrease.
00:08:30 Reactor Coolant System pressure began to decrease.
(0409:07)
00:10:00 Pressurizer level came on scale.
(0410:37)
- 5 -