Steam Generator Feedwater Pumps (FW-P-1A and FW-P-1B) were in
service, Condensate Booster Pumps (CO-P-2A, CO-P-2B and CO-P-2C)
were in service, and Condensate Pumps (CO-P-1A and CO-P-1B)
were in service. An attempt was being made to clear a clogged
resin transfer line in the standby demineralizer.
-00:00:01 Condensate Pump A (CO-P-1A) stopped.
(0400:36)
-00:00:01 Feedwater Pumps (FW-P-1A and FW-P-1B) stopped at essentially the
(0400:36)
same time resulting in a loss of feedwater flow to both steam
generators.
00:00:00 Main Generator was tripped followed by a turbine trip.
(0400:37)
00:00:00 Three Emergency Feedwater Pumps (EF-P-1, 2A, 2B) started.
(0400:37)
00:00:03 The Electromatic Relief Valve (RC-RV2) opened at the setpoint
(0400:40)
Approximate of 2255 psig.
00:00:08 Reactor tripped on high pressure at 2345 psi. Setpoint is 2355 psi.
(0400:45)
00:00:08 The operator placed the Pressurized Spray Valve (RC-V1) and pres-
(0400:45)
Approximate surizer heaters under automatic control.
00:00:13 The operator started the Reactor Coolant Makeup Pump A (MU-P-1A),
opened High Pressure Injection Isolation Valve A (MU-V16A) and
isolated letdown flow in anticipation of the expected pressurizer
level decrease.
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