Event Notification Report for January 31, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/30/2015 - 01/31/2015
Power Reactor
Event Number: 50781
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: DANIEL D WILSON
HQ OPS Officer: CHARLES TEAL
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: DANIEL D WILSON
HQ OPS Officer: CHARLES TEAL
Notification Date: 01/31/2015
Notification Time: 18:00 [ET]
Event Date: 01/31/2015
Event Time: 14:31 [EST]
Last Update Date: 01/31/2015
Notification Time: 18:00 [ET]
Event Date: 01/31/2015
Event Time: 14:31 [EST]
Last Update Date: 01/31/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
ANTHONY MASTERS (R2DO)
ANTHONY MASTERS (R2DO)
| 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 |
MANUAL RPS ACTUATION DUE TO OSCILLATIONS IN THE FEEDWATER SYSTEM
"At 1431 EST on 1/31/15, Oconee Unit 3 was manually tripped due to oscillations in the feedwater system in anticipation of an automatic trip. At 1427 EST, Unit 3 began experiencing small feedwater oscillations. Specifically, 3FDW-32, the 3A main feedwater control valve, appeared to be oscillating with corresponding feedwater flow oscillation. Feedwater oscillations continued to grow in magnitude and at 1431 EST a manual trip was directed by the Unit 3 control room supervisor. The shutdown was orderly and the unit is currently stable and in Mode 3 (Hot Standby). Units 1 and 2 were unaffected by the trip and are currently 100% power (Mode 1).
"Due to the RPS actuation while critical, this event is being reported as a 4-hour non-emergency per 10CFR50.72(b)(2)(iv)(B).
"Following the reactor trip, a main steam relief valve (MSRV) failed to reseat as expected. Emergency Operating procedure guidance was utilized to reduce main steam system pressure by approximately 80 psig to reseat the valve (valve reseated at 1506 EST). All of the main steam relief valves are now seated. In addition, the 3B condensate booster pump experienced a mechanical seal leak (approximately 4-5 gpm). The pump was subsequently secured at 1447 EST.
"All other post trip conditions were normal and all other systems performed as expected. Unit 3 is currently in Mode 3 and stable."
All rods fully inserted. Main Feedwater is feeding the steam generators and decay heat is being removed to the Main Condenser. The cause of the trip is under investigation. There is no known primary to secondary leakage.
The NRC Resident Inspector has been informed.
"At 1431 EST on 1/31/15, Oconee Unit 3 was manually tripped due to oscillations in the feedwater system in anticipation of an automatic trip. At 1427 EST, Unit 3 began experiencing small feedwater oscillations. Specifically, 3FDW-32, the 3A main feedwater control valve, appeared to be oscillating with corresponding feedwater flow oscillation. Feedwater oscillations continued to grow in magnitude and at 1431 EST a manual trip was directed by the Unit 3 control room supervisor. The shutdown was orderly and the unit is currently stable and in Mode 3 (Hot Standby). Units 1 and 2 were unaffected by the trip and are currently 100% power (Mode 1).
"Due to the RPS actuation while critical, this event is being reported as a 4-hour non-emergency per 10CFR50.72(b)(2)(iv)(B).
"Following the reactor trip, a main steam relief valve (MSRV) failed to reseat as expected. Emergency Operating procedure guidance was utilized to reduce main steam system pressure by approximately 80 psig to reseat the valve (valve reseated at 1506 EST). All of the main steam relief valves are now seated. In addition, the 3B condensate booster pump experienced a mechanical seal leak (approximately 4-5 gpm). The pump was subsequently secured at 1447 EST.
"All other post trip conditions were normal and all other systems performed as expected. Unit 3 is currently in Mode 3 and stable."
All rods fully inserted. Main Feedwater is feeding the steam generators and decay heat is being removed to the Main Condenser. The cause of the trip is under investigation. There is no known primary to secondary leakage.
The NRC Resident Inspector has been informed.
Agreement State
Event Number: 50837
Rep Org: OK DEQ RAD MANAGEMENT
Licensee: GLOBE X-RAY SERVICES
Region: 4
City: TULSA State: OK
County:
License #: OK-15194-02
Agreement: Y
Docket:
NRC Notified By: KEVIN SAMPSON
HQ OPS Officer: VINCE KLCO
Licensee: GLOBE X-RAY SERVICES
Region: 4
City: TULSA State: OK
County:
License #: OK-15194-02
Agreement: Y
Docket:
NRC Notified By: KEVIN SAMPSON
HQ OPS Officer: VINCE KLCO
Notification Date: 02/20/2015
Notification Time: 11:30 [ET]
Event Date: 01/31/2015
Event Time: 00:00 [CST]
Last Update Date: 02/20/2015
Notification Time: 11:30 [ET]
Event Date: 01/31/2015
Event Time: 00:00 [CST]
Last Update Date: 02/20/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
NICK TAYLOR (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
NICK TAYLOR (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
AGREEMENT STATE - POTENTIAL RADIOGRAPHER OVER-EXPOSURE
The following information was received from the State of Oklahoma via email:
"[The Oklahoma Department of Environmental Quality has] been notified by Globe X-Ray Services (OK-15194-02) that one of their assistant radiographers received a reported dose of 5.083 R for the month of January, 2015. The assistant has been suspended and stated that he dropped his badge at some point during the monitoring period but did not report it until now. Landauer reported that the reading was 'inconclusive'. Investigation is ongoing."
The following information was received from the State of Oklahoma via email:
"[The Oklahoma Department of Environmental Quality has] been notified by Globe X-Ray Services (OK-15194-02) that one of their assistant radiographers received a reported dose of 5.083 R for the month of January, 2015. The assistant has been suspended and stated that he dropped his badge at some point during the monitoring period but did not report it until now. Landauer reported that the reading was 'inconclusive'. Investigation is ongoing."