Event Notification Report for May 08, 2002
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/07/2002 - 05/08/2002
EVENT NUMBERS
38906
Power Reactor
Event Number: 38906
Facility: WOLF CREEK
Region: 4 State: KS
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: GILMORE
HQ OPS Officer: CHAUNCEY GOULD
Region: 4 State: KS
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: GILMORE
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 05/08/2002
Notification Time: 18:43 [ET]
Event Date: 05/08/2002
Event Time: 17:07 [CDT]
Last Update Date: 05/08/2002
Notification Time: 18:43 [ET]
Event Date: 05/08/2002
Event Time: 17:07 [CDT]
Last Update Date: 05/08/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
MARK SHAFFER (R4)
MARK SHAFFER (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
REACTOR TRIP FROM 100% POWER ON STEAM GENERATOR LOW/LOW LEVEL SIGNAL
A channel operational test of Tavg, delta T, and pressurizer pressure for protection set two was being performed by I&C technicians. While swapping steam generator level channels, they placed the "D" feedwater reg valve in manual per procedure. The feedwater reg valve failed closed and they attempted to manually open the valve, but there was no response. When they put the controller in automatic, the valve started to reopen, but the response was not fast enough and the reactor tripped on steam generator lo-lo level. The auxiliary feedwater actuated as designed and all rods fully inserted. No relief valves lifted. The licensee is investigating the cause of the valve malfunction.
The NRC Resident Inspector was notified and the licensee will issue a press release.
A channel operational test of Tavg, delta T, and pressurizer pressure for protection set two was being performed by I&C technicians. While swapping steam generator level channels, they placed the "D" feedwater reg valve in manual per procedure. The feedwater reg valve failed closed and they attempted to manually open the valve, but there was no response. When they put the controller in automatic, the valve started to reopen, but the response was not fast enough and the reactor tripped on steam generator lo-lo level. The auxiliary feedwater actuated as designed and all rods fully inserted. No relief valves lifted. The licensee is investigating the cause of the valve malfunction.
The NRC Resident Inspector was notified and the licensee will issue a press release.