Event Notification Report for April 14, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/13/2011 - 04/14/2011
EVENT NUMBERS
46755467564695446751
Power Reactor
Event Number: 46755
Facility: SAN ONOFRE
Region: 4 State: CA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: TRAVIS FELDER
HQ OPS Officer: JOHN KNOKE
Region: 4 State: CA
Unit: [] [2] []
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: TRAVIS FELDER
HQ OPS Officer: JOHN KNOKE
Notification Date: 04/14/2011
Notification Time: 16:52 [ET]
Event Date: 04/14/2011
Event Time: 12:35 [PDT]
Last Update Date: 04/14/2011
Notification Time: 16:52 [ET]
Event Date: 04/14/2011
Event Time: 12:35 [PDT]
Last Update Date: 04/14/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
GEOFFREY MILLER (R4DO)
GEOFFREY MILLER (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION TO STATE OF CALIFORNIA DUE TO HYDROGEN LEAK
"During a scheduled delivery of Hydrogen to Unit 2's active and reserve hydrogen banks, a hydrogen leak was detected at the hydrogen fill connection isolation valve. A notification was made for an uncontrolled release of hazardous material to San Diego Department of Environmental Health at 12:35 PST and California Emergency Management Agency at 12:40 PST. Upon detection, the leak was isolated."
The licensee has notified the NRC Resident Inspector.
"During a scheduled delivery of Hydrogen to Unit 2's active and reserve hydrogen banks, a hydrogen leak was detected at the hydrogen fill connection isolation valve. A notification was made for an uncontrolled release of hazardous material to San Diego Department of Environmental Health at 12:35 PST and California Emergency Management Agency at 12:40 PST. Upon detection, the leak was isolated."
The licensee has notified the NRC Resident Inspector.
Power Reactor
Event Number: 46756
Facility: COOPER
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: BRIAN STANDER
HQ OPS Officer: JOHN KNOKE
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: BRIAN STANDER
HQ OPS Officer: JOHN KNOKE
Notification Date: 04/14/2011
Notification Time: 19:54 [ET]
Event Date: 04/14/2011
Event Time: 16:25 [CDT]
Last Update Date: 04/14/2011
Notification Time: 19:54 [ET]
Event Date: 04/14/2011
Event Time: 16:25 [CDT]
Last Update Date: 04/14/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
GEOFFREY MILLER (R4DO)
GEOFFREY MILLER (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
OFFSITE NOTIFICATION TO NEBRASKA DEPARTMENT OF ENVIRONMENTAL QUALITY
"On 4/14/11 at 1625 CDT, NPPD/CNS notified the Nebraska Department of Environmental Quality (NDEQ) of a violation of the National Pollutant Discharge Elimination System (NPDES) requirements during March 2011.
"The NPDES conditions for Total Suspended Solids (TSS) for reverse osmosis (RO) Reject and Boiler Blowdown Waste streams (Outfall 004 - sludge pond), for the month of March exceeded the maximum daily value of 100 mg/L and 30-day average of 30 mg/L. The value of the TSS for the month of March was 190 mg/L. This exceeds the NPDES conditions for TSS during the month of March. The April TSS for NPDES Outfall 004 was verified to be within limits at 6.4 mg/L. This outfall discharges to the Missouri River.
"This is a 4 hour report per 10 CFR 50.72(b)(2)(xi) for any event or situation related to the protection of the environment, for which notification to another government agency has been made."
The licensee has notified the NRC Resident Inspector.
"On 4/14/11 at 1625 CDT, NPPD/CNS notified the Nebraska Department of Environmental Quality (NDEQ) of a violation of the National Pollutant Discharge Elimination System (NPDES) requirements during March 2011.
"The NPDES conditions for Total Suspended Solids (TSS) for reverse osmosis (RO) Reject and Boiler Blowdown Waste streams (Outfall 004 - sludge pond), for the month of March exceeded the maximum daily value of 100 mg/L and 30-day average of 30 mg/L. The value of the TSS for the month of March was 190 mg/L. This exceeds the NPDES conditions for TSS during the month of March. The April TSS for NPDES Outfall 004 was verified to be within limits at 6.4 mg/L. This outfall discharges to the Missouri River.
"This is a 4 hour report per 10 CFR 50.72(b)(2)(xi) for any event or situation related to the protection of the environment, for which notification to another government agency has been made."
The licensee has notified the NRC Resident Inspector.
Power Reactor
Event Number: 46954
Facility: DUANE ARNOLD
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: BOB MURRELL
HQ OPS Officer: MARK ABRAMOVITZ
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: BOB MURRELL
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 06/13/2011
Notification Time: 15:19 [ET]
Event Date: 04/14/2011
Event Time: 20:43 [CDT]
Last Update Date: 06/13/2011
Notification Time: 15:19 [ET]
Event Date: 04/14/2011
Event Time: 20:43 [CDT]
Last Update Date: 06/13/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
Person (Organization):
LAURA KOZAK (R3DO)
LAURA KOZAK (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
INVALID PRIMARY CONTAINMENT ISOLATION SYSTEM ACTUATION DUE TO CONNECTOR HIGH RESISTANCE
"This 60-day telephone notification is being made under reporting requirements specified by 10CFR50.73(a)(2)(iv)(A) to describe an invalid actuation of a containment isolation signal affecting more than one system.
"At 2043 on April 14, 2011, with the Duane Arnold Energy Center (DAEC) operating at 100% power, an invalid Group 3 isolation on the 'A' side of the Primary Containment Isolation System occurred. Group 3 isolation signals were generated for Primary Containment Isolation Valves for Drywell and Torus Ventilation, and Purge, Containment Nitrogen Compressor Suction and Discharge, Recirculation Pump Seals, and Post Accident Sample System.
"This event was caused by a high resistance contact on connectors in the detector circuitry for the 'A' Reactor Building Vent Shaft Radiation Monitor.
"All equipment responded in accordance with the plant design. Specifically, all actuations were complete and successful.
"There were no safety consequences or impacts on the health and safety of the public. The event was entered into DAEC's corrective action program for resolution.
"The licensee notified the NRC Resident Inspector."
"This 60-day telephone notification is being made under reporting requirements specified by 10CFR50.73(a)(2)(iv)(A) to describe an invalid actuation of a containment isolation signal affecting more than one system.
"At 2043 on April 14, 2011, with the Duane Arnold Energy Center (DAEC) operating at 100% power, an invalid Group 3 isolation on the 'A' side of the Primary Containment Isolation System occurred. Group 3 isolation signals were generated for Primary Containment Isolation Valves for Drywell and Torus Ventilation, and Purge, Containment Nitrogen Compressor Suction and Discharge, Recirculation Pump Seals, and Post Accident Sample System.
"This event was caused by a high resistance contact on connectors in the detector circuitry for the 'A' Reactor Building Vent Shaft Radiation Monitor.
"All equipment responded in accordance with the plant design. Specifically, all actuations were complete and successful.
"There were no safety consequences or impacts on the health and safety of the public. The event was entered into DAEC's corrective action program for resolution.
"The licensee notified the NRC Resident Inspector."
Power Reactor
Event Number: 46751
Facility: NORTH ANNA
Region: 2 State: VA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: DON TAYLOR
HQ OPS Officer: JOHN KNOKE
Region: 2 State: VA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: DON TAYLOR
HQ OPS Officer: JOHN KNOKE
Notification Date: 04/13/2011
Notification Time: 16:15 [ET]
Event Date: 04/14/2011
Event Time: 04:00 [EDT]
Last Update Date: 04/15/2011
Notification Time: 16:15 [ET]
Event Date: 04/14/2011
Event Time: 04:00 [EDT]
Last Update Date: 04/15/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
KATHLEEN O'DONOHUE (R2DO)
KATHLEEN O'DONOHUE (R2DO)
| 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 |
TECHNICAL SUPPORT CENTER VENTILATION SYSTEM OUT OF SERVICE FOR MAINTENANCE
"This is a voluntary notification for planned maintenance that affects the TSC ventilation system.
"At approximately 0400 EDT an April 14, 2011 the North Anna TSC [Technical Support Center] air conditioning and filtration systems will be rendered non-functional to perform preventive maintenance on electrical buses supplying power. This condition has the potential to render the TSC unavailable due to the inability of the ventilation and filtration system to maintain a habitable atmosphere. Temporary ventilation is being established for the TSC computer room. The maintenance is expected to last less than 24 hours. Compensatory measures exist to relocate the TSC to alternate locations, if needed.
"The NRC Resident Inspector has been notified."
* * * UPDATE FROM PATRICK FRENCH TO HOWIE CROUCH AT 1738 EDT ON 4/15/11 * * *
The maintenance on the TSC ventilation system has been completed and the TSC has been returned to service.
The licensee will be notifying the NRC Resident Inspector. Notified R2DO (O'Donohue).
"This is a voluntary notification for planned maintenance that affects the TSC ventilation system.
"At approximately 0400 EDT an April 14, 2011 the North Anna TSC [Technical Support Center] air conditioning and filtration systems will be rendered non-functional to perform preventive maintenance on electrical buses supplying power. This condition has the potential to render the TSC unavailable due to the inability of the ventilation and filtration system to maintain a habitable atmosphere. Temporary ventilation is being established for the TSC computer room. The maintenance is expected to last less than 24 hours. Compensatory measures exist to relocate the TSC to alternate locations, if needed.
"The NRC Resident Inspector has been notified."
* * * UPDATE FROM PATRICK FRENCH TO HOWIE CROUCH AT 1738 EDT ON 4/15/11 * * *
The maintenance on the TSC ventilation system has been completed and the TSC has been returned to service.
The licensee will be notifying the NRC Resident Inspector. Notified R2DO (O'Donohue).