Event Notification Report for January 27, 2003
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/26/2003 - 01/27/2003
EVENT NUMBERS
39538
Power Reactor
Event Number: 39538
Facility: TURKEY POINT
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: JEFF DEAL
HQ OPS Officer: STEVE SANDIN
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: JEFF DEAL
HQ OPS Officer: STEVE SANDIN
Notification Date: 01/27/2003
Notification Time: 10:05 [ET]
Event Date: 01/27/2003
Event Time: 08:44 [EST]
Last Update Date: 01/27/2003
Notification Time: 10:05 [ET]
Event Date: 01/27/2003
Event Time: 08:44 [EST]
Last Update Date: 01/27/2003
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):
KEN BARR (R2)
KEN BARR (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | M/R | Y | 100 | Power Operation | 0 | Hot Standby |
UNIT 3 MANUALLY TRIPPED DUE TO LOW STEAM GENERATOR LEVELS
The following information was submitted via facsimile:
"Manual reactor trip on Unit 3 due to low steam generator levels caused by a loss of instrument air pressure. Instrument air pressure has been restored."
Operators manually tripped Unit 3 following the loss of instrument air (IA) pressure which resulted in closing of the main feedwater regulating valves. IA can be supplied from one of four compressors; two motor driven and two diesel driven. When the operating motor driven air compressor breaker tripped, both diesel driven compressors received a start signal (the other motor driven compressor had been previously removed from service). One of the diesel driven compressors failed to start while the other started and tripped. IA pressure was restored by manually starting one of the diesel units. The licensee has the cause of the IA loss under investigation.
Following the manual reactor trip, all three turbine driven auxiliary feedwater pumps started as expected. The licensee is in the process of restoring normal feedwater and returning the auxiliary feedwater pumps to standby. The atmospheric steam dumps are currently in service to remove decay heat (no known primary-secondary leakage). All control rods fully inserted.
The licensee will notify the resident inspector and does not plan a press release.
The following information was submitted via facsimile:
"Manual reactor trip on Unit 3 due to low steam generator levels caused by a loss of instrument air pressure. Instrument air pressure has been restored."
Operators manually tripped Unit 3 following the loss of instrument air (IA) pressure which resulted in closing of the main feedwater regulating valves. IA can be supplied from one of four compressors; two motor driven and two diesel driven. When the operating motor driven air compressor breaker tripped, both diesel driven compressors received a start signal (the other motor driven compressor had been previously removed from service). One of the diesel driven compressors failed to start while the other started and tripped. IA pressure was restored by manually starting one of the diesel units. The licensee has the cause of the IA loss under investigation.
Following the manual reactor trip, all three turbine driven auxiliary feedwater pumps started as expected. The licensee is in the process of restoring normal feedwater and returning the auxiliary feedwater pumps to standby. The atmospheric steam dumps are currently in service to remove decay heat (no known primary-secondary leakage). All control rods fully inserted.
The licensee will notify the resident inspector and does not plan a press release.