Event Notification Report for January 09, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/08/2010 - 01/09/2010
General Information or Other
Event Number: 45626
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: IESCO, LLC
Region: 4
City: EL SEGUNDO State: CA
County:
License #: 6571-19
Agreement: Y
Docket:
NRC Notified By: ANDREW TAYLOR
HQ OPS Officer: HOWIE CROUCH
Licensee: IESCO, LLC
Region: 4
City: EL SEGUNDO State: CA
County:
License #: 6571-19
Agreement: Y
Docket:
NRC Notified By: ANDREW TAYLOR
HQ OPS Officer: HOWIE CROUCH
Notification Date: 01/12/2010
Notification Time: 16:10 [ET]
Event Date: 01/09/2010
Event Time: 00:00 [PST]
Last Update Date: 01/12/2010
Notification Time: 16:10 [ET]
Event Date: 01/09/2010
Event Time: 00:00 [PST]
Last Update Date: 01/12/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
BOB HAGAR (R4DO)
ROBERT LEWIS (FSME)
BOB HAGAR (R4DO)
ROBERT LEWIS (FSME)
AGREEMENT STATE REPORT - RADIOGRAPHY SOURCE DISCONNECTED
"On Saturday, January 9, 2010, the Radiation Safety Officer (RSO) of IESCO, LLC, contacted the California Office of Emergency Services to report that a Selenium 75 (27.5 Curies) industrial radiography source disconnected from the drive cable during radiography operations at the Chevron, El Segundo Refinery. During the first exposure, the source disconnected from the drive cable. This was discovered during the radiographer's confirmatory survey, as required after the source is cranked back in the shielded position. It was discovered that the source was disconnected near the collimator and when the drive cable was retracted, the source would slide back a couple of inches and the pigtail would be caught at a bend in the guide tube, allowing the source to be partially removed from the collimator. The radiographer placed lead shielding over the exposed source to minimize radiation exposure. The radiographer then contacted the RSO. Upon arrival at the site, the RSO disconnected the guide tube from the exposure device and then assessed the situation. He placed more lead shielding on the camera until the dose rate at 6 feet was at 20 Mr/hr. He returned the drive cable to the guide tube, reinserted the drive cable into the guide tube and removed the guide tube from the collimator. The RSO was then able to connect the drive cable to the pigtail and crank it back into the exposure device. The RSO stated that the reading taken from the Direct Reading Pocket Dosimeter (DRPD) of the radiographer was 9 Mr and the DRPD of the RSO was 25 Mr.
"After inspecting the equipment and interviewing the radiographer and assistant, the RSO concluded that the source disconnect occurred due to dirt on the shutter of the drive cable preventing the cover on the pigtail from closing, preventing a secure connection. The RSO has scheduled a safety meeting to ensure that the radiographers are aware of the issue and instructed how to avoid another incident. Further investigation will be deferred until the 30 day report has been submitted and reviewed."
California Report No: 5010-010910
"On Saturday, January 9, 2010, the Radiation Safety Officer (RSO) of IESCO, LLC, contacted the California Office of Emergency Services to report that a Selenium 75 (27.5 Curies) industrial radiography source disconnected from the drive cable during radiography operations at the Chevron, El Segundo Refinery. During the first exposure, the source disconnected from the drive cable. This was discovered during the radiographer's confirmatory survey, as required after the source is cranked back in the shielded position. It was discovered that the source was disconnected near the collimator and when the drive cable was retracted, the source would slide back a couple of inches and the pigtail would be caught at a bend in the guide tube, allowing the source to be partially removed from the collimator. The radiographer placed lead shielding over the exposed source to minimize radiation exposure. The radiographer then contacted the RSO. Upon arrival at the site, the RSO disconnected the guide tube from the exposure device and then assessed the situation. He placed more lead shielding on the camera until the dose rate at 6 feet was at 20 Mr/hr. He returned the drive cable to the guide tube, reinserted the drive cable into the guide tube and removed the guide tube from the collimator. The RSO was then able to connect the drive cable to the pigtail and crank it back into the exposure device. The RSO stated that the reading taken from the Direct Reading Pocket Dosimeter (DRPD) of the radiographer was 9 Mr and the DRPD of the RSO was 25 Mr.
"After inspecting the equipment and interviewing the radiographer and assistant, the RSO concluded that the source disconnect occurred due to dirt on the shutter of the drive cable preventing the cover on the pigtail from closing, preventing a secure connection. The RSO has scheduled a safety meeting to ensure that the radiographers are aware of the issue and instructed how to avoid another incident. Further investigation will be deferred until the 30 day report has been submitted and reviewed."
California Report No: 5010-010910
Power Reactor
Event Number: 45617
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: ED LESSMANN
HQ OPS Officer: HOWIE CROUCH
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: ED LESSMANN
HQ OPS Officer: HOWIE CROUCH
Notification Date: 01/09/2010
Notification Time: 12:14 [ET]
Event Date: 01/09/2010
Event Time: 10:28 [CST]
Last Update Date: 01/09/2010
Notification Time: 12:14 [ET]
Event Date: 01/09/2010
Event Time: 10:28 [CST]
Last Update Date: 01/09/2010
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):
MICHAEL SHANNON (R4DO)
MICHAEL SHANNON (R4DO)
| 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 |
AUTOMATIC REACTOR TRIP DUE TO TURBINE TRIP ON SUDDEN PRESSURE IN OUTPUT TRANSFORMER
"At 1028 CST on the 9th of January, Unit 1 tripped due to turbine trip greater than 50% reactor power. The turbine trip was caused by a sudden pressure fault of the Unit 1 main generator output transformer (1MT1).
"All systems operated as designed. All three auxiliary feedwater pumps auto-started as required. There were no complications noted on the reactor trip.
"Current status: Holding in mode 3 and shutting down secondary equipment. Decay heat removal is via auxiliary feed and main condenser steam dumps."
All rods inserted during the trip. No relief or safety valves lifted during the transient. The electrical grid is stable and Unit 1 is in its' normal shutdown electrical lineup. Investigation of the transformer fault is underway. Unit 2 was unaffected by the transient.
The licensee will be notifying the NRC Resident Inspector.
"At 1028 CST on the 9th of January, Unit 1 tripped due to turbine trip greater than 50% reactor power. The turbine trip was caused by a sudden pressure fault of the Unit 1 main generator output transformer (1MT1).
"All systems operated as designed. All three auxiliary feedwater pumps auto-started as required. There were no complications noted on the reactor trip.
"Current status: Holding in mode 3 and shutting down secondary equipment. Decay heat removal is via auxiliary feed and main condenser steam dumps."
All rods inserted during the trip. No relief or safety valves lifted during the transient. The electrical grid is stable and Unit 1 is in its' normal shutdown electrical lineup. Investigation of the transformer fault is underway. Unit 2 was unaffected by the transient.
The licensee will be notifying the NRC Resident Inspector.
Power Reactor
Event Number: 45618
Facility: BRAIDWOOD
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MIKE DEBOARD
HQ OPS Officer: HOWIE CROUCH
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MIKE DEBOARD
HQ OPS Officer: HOWIE CROUCH
Notification Date: 01/09/2010
Notification Time: 21:33 [ET]
Event Date: 01/09/2010
Event Time: 19:51 [CST]
Last Update Date: 01/09/2010
Notification Time: 21:33 [ET]
Event Date: 01/09/2010
Event Time: 19:51 [CST]
Last Update Date: 01/09/2010
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):
ANN MARIE STONE (R3DO)
JEFFERY GRANT (IRD)
JOSEPH GIITTER (NRR)
MARK SATORIUS (R3RA)
ERIC LEEDS (NRR)
ANN MARIE STONE (R3DO)
JEFFERY GRANT (IRD)
JOSEPH GIITTER (NRR)
MARK SATORIUS (R3RA)
ERIC LEEDS (NRR)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
NOTIFICATION OF UNUSUAL EVENT DECLARED DUE TO A FIRE IN THE AUXILIARY BUILDING LASTING GREATER THAN 15 MINUTES
"At 1925 [hrs. CST], the Main Control Room received a notification of smoke in the Auxiliary Building Ventilation Supply Plenum. Fire Brigade and the Incident Commander were dispatched. Once [they] arrived at the scene, they noted smoke in the area of the 0C VA Supply Fan and requested the fan be shutdown. The 0C VA supply fan was shutdown at 1933 hrs. The operators reported smoke and a small fire coming from the inboard bearing of the 0C VA supply fan. A CO2 fire extinguisher was used to put the fire out and cool the bearing. A total of 2 extinguishers were used. The fire was declared out at 1941 hrs. Both Units remained stable and at full power during the entire event.
"There were no injuries, and no off site assistance was required."
The licensee notified state and local authorities and the NRC Resident Inspector.
* * * UPDATE FROM DEBOARD TO CROUCH @ 2231 CST ON 01/09/10 * * *
"At 2111 CST [on] 1-9-2010, the Unusual Event was terminated. The fire is out. Both Units are stable. A fire watch is established. There are no signs of reflash. [Braidwood] no longer [meets the] Unusual Event action level threshold."
The licensee has notified the NRC Resident Inspector. Notified IRD (Grant), R3DO (Stone), NRR EO (Giiter), DHS (Inzler) and FEMA (Casto).
"At 1925 [hrs. CST], the Main Control Room received a notification of smoke in the Auxiliary Building Ventilation Supply Plenum. Fire Brigade and the Incident Commander were dispatched. Once [they] arrived at the scene, they noted smoke in the area of the 0C VA Supply Fan and requested the fan be shutdown. The 0C VA supply fan was shutdown at 1933 hrs. The operators reported smoke and a small fire coming from the inboard bearing of the 0C VA supply fan. A CO2 fire extinguisher was used to put the fire out and cool the bearing. A total of 2 extinguishers were used. The fire was declared out at 1941 hrs. Both Units remained stable and at full power during the entire event.
"There were no injuries, and no off site assistance was required."
The licensee notified state and local authorities and the NRC Resident Inspector.
* * * UPDATE FROM DEBOARD TO CROUCH @ 2231 CST ON 01/09/10 * * *
"At 2111 CST [on] 1-9-2010, the Unusual Event was terminated. The fire is out. Both Units are stable. A fire watch is established. There are no signs of reflash. [Braidwood] no longer [meets the] Unusual Event action level threshold."
The licensee has notified the NRC Resident Inspector. Notified IRD (Grant), R3DO (Stone), NRR EO (Giiter), DHS (Inzler) and FEMA (Casto).