Event Notification Report for December 27, 1999
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/26/1999 - 12/27/1999
Power Reactor
Event Number: 36541
Facility: CRYSTAL RIVER
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] B&W-L-LP
NRC Notified By: RICKY E. RAWLS
HQ OPS Officer: LEIGH TROCINE
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] B&W-L-LP
NRC Notified By: RICKY E. RAWLS
HQ OPS Officer: LEIGH TROCINE
Notification Date: 12/27/1999
Notification Time: 11:20 [ET]
Event Date: 12/27/1999
Event Time: 10:00 [EST]
Last Update Date: 12/27/1999
Notification Time: 11:20 [ET]
Event Date: 12/27/1999
Event Time: 10:00 [EST]
Last Update Date: 12/27/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(vi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(vi) - OFFSITE NOTIFICATION
Person (Organization):
CHRIS CHRISTENSEN (R2)
CHRIS CHRISTENSEN (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION REGARDING THE RESCUE OF AN ENDANGERED SEA TURTLE
The following text is a portion of a facsimile received from the licensee:
"An endangered Kemp-Ridley sea turtle was rescued at the [Crystal River Unit 3] intake area. The endangered turtle was NOT injured. The turtle was transported to the Florida Power [Corporation] Mariculture Center. The Florida Department of Environmental Protection was notified at 1000 EST on 12/27/99."
The licensee also notified the NRC resident inspector.
The following text is a portion of a facsimile received from the licensee:
"An endangered Kemp-Ridley sea turtle was rescued at the [Crystal River Unit 3] intake area. The endangered turtle was NOT injured. The turtle was transported to the Florida Power [Corporation] Mariculture Center. The Florida Department of Environmental Protection was notified at 1000 EST on 12/27/99."
The licensee also notified the NRC resident inspector.
Power Reactor
Event Number: 36543
Facility: OCONEE
Region: 2 State: SC
Unit: [] [] [3]
RX Type: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP
NRC Notified By: YONGUE
HQ OPS Officer: CHAUNCEY GOULD
Region: 2 State: SC
Unit: [] [] [3]
RX Type: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP
NRC Notified By: YONGUE
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 12/27/1999
Notification Time: 21:13 [ET]
Event Date: 12/27/1999
Event Time: 20:40 [EST]
Last Update Date: 12/27/1999
Notification Time: 21:13 [ET]
Event Date: 12/27/1999
Event Time: 20:40 [EST]
Last Update Date: 12/27/1999
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a)(1)(i) - EMERGENCY DECLARED
10 CFR Section:
50.72(a)(1)(i) - EMERGENCY DECLARED
Person (Organization):
CHRIS CHRISTENSEN (R2)
BRUCE BOGER (NRR)
CHARLES MILLER (IRO)
BAGWELL (FEMA)
CHRIS CHRISTENSEN (R2)
BRUCE BOGER (NRR)
CHARLES MILLER (IRO)
BAGWELL (FEMA)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 55 | Power Operation |
UNUSUAL EVENT DECLARED AT 2040 DUE TO AN IDENTIFIED REACTOR COOLANT LEAK.
WHILE DOING A FEED AND BLEED OF THE LETDOWN SYSTEM, THE LETDOWN STORAGE TANK BYPASS VALVE (3HP14) APPARENTLY DID NOT FULLY CLOSE, EVEN THOUGH IT WAS INDICATED CLOSED, BECAUSE THE WATER LEVEL IN THE LETDOWN STORAGE TANK WAS STILL DECREASING. APPROXIMATELY 45 GPM OF RCS WATER BLED THROUGH THE VALVE INTO THE "3A" BLEED HOLDUP TANK, WHICH HOLDS A RECOVERABLE WATER SOURCE THAT CAN BE INJECTED BACK INTO THE SYSTEM. THE LEAKAGE WAS ISOLATED AT 2042 WHEN LETDOWN ISOLATION VALVE "3HP5" WAS CLOSED. AT THAT TIME, THE UNUSUAL EVENT WAS ALSO TERMINATED. THE TOTAL AMOUNT OF RCS WATER BLED INTO THE BLEED HOLDUP TANK HAS NOT YET BEEN DETERMINED. THERE APPEARS TO BE A PROBLEM WITH BOTH THE VALVE POSITION INDICATION, AND THE PNEUMATIC VALVE ITSELF. THE REACTOR IS BEING SHUT DOWN AS REQUIRED BY ABNORMAL PROCEDURES, AND THE LICENSEE PLANS TO PLACE THE UNIT IN MODE 3.
THE RESIDENT INSPECTOR HAS BEEN NOTIFIED ALONG WITH STATE AND LOCAL AGENCIES.
THERE WILL BE NO PRESS RELEASE.
WHILE DOING A FEED AND BLEED OF THE LETDOWN SYSTEM, THE LETDOWN STORAGE TANK BYPASS VALVE (3HP14) APPARENTLY DID NOT FULLY CLOSE, EVEN THOUGH IT WAS INDICATED CLOSED, BECAUSE THE WATER LEVEL IN THE LETDOWN STORAGE TANK WAS STILL DECREASING. APPROXIMATELY 45 GPM OF RCS WATER BLED THROUGH THE VALVE INTO THE "3A" BLEED HOLDUP TANK, WHICH HOLDS A RECOVERABLE WATER SOURCE THAT CAN BE INJECTED BACK INTO THE SYSTEM. THE LEAKAGE WAS ISOLATED AT 2042 WHEN LETDOWN ISOLATION VALVE "3HP5" WAS CLOSED. AT THAT TIME, THE UNUSUAL EVENT WAS ALSO TERMINATED. THE TOTAL AMOUNT OF RCS WATER BLED INTO THE BLEED HOLDUP TANK HAS NOT YET BEEN DETERMINED. THERE APPEARS TO BE A PROBLEM WITH BOTH THE VALVE POSITION INDICATION, AND THE PNEUMATIC VALVE ITSELF. THE REACTOR IS BEING SHUT DOWN AS REQUIRED BY ABNORMAL PROCEDURES, AND THE LICENSEE PLANS TO PLACE THE UNIT IN MODE 3.
THE RESIDENT INSPECTOR HAS BEEN NOTIFIED ALONG WITH STATE AND LOCAL AGENCIES.
THERE WILL BE NO PRESS RELEASE.
Power Reactor
Event Number: 36798
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: WILLIAMSON
HQ OPS Officer: CHAUNCEY GOULD
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: WILLIAMSON
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 03/15/2000
Notification Time: 15:55 [ET]
Event Date: 12/27/1999
Event Time: 19:52 [CST]
Last Update Date: 03/15/2000
Notification Time: 15:55 [ET]
Event Date: 12/27/1999
Event Time: 19:52 [CST]
Last Update Date: 03/15/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
Person (Organization):
DAVID GRAVES (R4)
DAVID GRAVES (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
PLANT HAD ACTUATION OF THEIR STANDBY GAS TREATMENT AND ANNULUS MIXING SYSTEMS
On December 27, 1999, at 1925 (CST), an unplanned automatic actuation of the standby gas treatment and annulus mixing systems occurred. The initiating signal originated in radiation monitor 11B, which monitors the reactor building annulus for gaseous activity. Grab samples of the annulus atmosphere were taken, and were found to be normal. The 11A radiation monitor in the same process stream likewise indicated no presence of radioactivity. The filter cartridge in the 11B radiation monitor was changed, and its indication returned to normal. The standby gas treatment and annulus mixing systems were returned to their normal lineup.
This event is being reported in accordance with 10CFR50.72(b)(2)(ii) as an event that resulted in the automatic actuation of an engineered safety feature.
An investigation of the event found that the filter cartridge in the 11B radiation monitor was incorrectly installed, such that particulate matter could reach the sample chamber. The monitor is designed to detect gaseous radioactivity, and the purpose of the filter assembly is to keep particulate matter out of the sample chamber. There is a charcoal cartridge in the upstream of the filter to remove iodine. The detector in the sample chamber was determined to be responding correctly, and it is postulated that a transient particle from the charcoal cartridge bypassed the filter element, and was detected in the sample chamber.
The event was not reported within the timeframe required by 10CFR50.72, because there was no corroborating evidence that radioactivity sufficient to actuate the ventilation process monitors was present in the annulus. Subsequent discussion with the NRC has determined that this event was reportable on 3/15/00 @ 1450 CST.
The NRC Resident Inspector will be notified.
On December 27, 1999, at 1925 (CST), an unplanned automatic actuation of the standby gas treatment and annulus mixing systems occurred. The initiating signal originated in radiation monitor 11B, which monitors the reactor building annulus for gaseous activity. Grab samples of the annulus atmosphere were taken, and were found to be normal. The 11A radiation monitor in the same process stream likewise indicated no presence of radioactivity. The filter cartridge in the 11B radiation monitor was changed, and its indication returned to normal. The standby gas treatment and annulus mixing systems were returned to their normal lineup.
This event is being reported in accordance with 10CFR50.72(b)(2)(ii) as an event that resulted in the automatic actuation of an engineered safety feature.
An investigation of the event found that the filter cartridge in the 11B radiation monitor was incorrectly installed, such that particulate matter could reach the sample chamber. The monitor is designed to detect gaseous radioactivity, and the purpose of the filter assembly is to keep particulate matter out of the sample chamber. There is a charcoal cartridge in the upstream of the filter to remove iodine. The detector in the sample chamber was determined to be responding correctly, and it is postulated that a transient particle from the charcoal cartridge bypassed the filter element, and was detected in the sample chamber.
The event was not reported within the timeframe required by 10CFR50.72, because there was no corroborating evidence that radioactivity sufficient to actuate the ventilation process monitors was present in the annulus. Subsequent discussion with the NRC has determined that this event was reportable on 3/15/00 @ 1450 CST.
The NRC Resident Inspector will be notified.