Event Notification Report for August 10, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/09/2011 - 08/10/2011
Part 21
Event Number: 47162
Rep Org: HYDROAIRE
Licensee: HYDROAIRE
Region: 3
City: CHICAGO State: IL
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ADAM JUNG
HQ OPS Officer: CHARLES TEAL
Licensee: HYDROAIRE
Region: 3
City: CHICAGO State: IL
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ADAM JUNG
HQ OPS Officer: CHARLES TEAL
Notification Date: 08/17/2011
Notification Time: 16:52 [ET]
Event Date: 08/10/2011
Event Time: 00:00 [CDT]
Last Update Date: 08/17/2011
Notification Time: 16:52 [ET]
Event Date: 08/10/2011
Event Time: 00:00 [CDT]
Last Update Date: 08/17/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21 - UNSPECIFIED PARAGRAPH
10 CFR Section:
21.21 - UNSPECIFIED PARAGRAPH
Person (Organization):
HIRONORI PETERSON (R3DO)
PART 21 GROUP (EMAI)
HIRONORI PETERSON (R3DO)
PART 21 GROUP (EMAI)
PART 21 - PUMP SHAFT COUPLING FAILURE
During operation a service water pump coupling failed on 8/10/2011 at Entergy Palisades. The failure occurred in a threaded line shaft coupling. At this point, the failure cause is not known. The root cause analysis is currently underway.
During operation a service water pump coupling failed on 8/10/2011 at Entergy Palisades. The failure occurred in a threaded line shaft coupling. At this point, the failure cause is not known. The root cause analysis is currently underway.
Power Reactor
Event Number: 47138
Facility: DUANE ARNOLD
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: JEFF MIELL
HQ OPS Officer: HOWIE CROUCH
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: JEFF MIELL
HQ OPS Officer: HOWIE CROUCH
Notification Date: 08/10/2011
Notification Time: 02:06 [ET]
Event Date: 08/10/2011
Event Time: 01:00 [CDT]
Last Update Date: 08/12/2011
Notification Time: 02:06 [ET]
Event Date: 08/10/2011
Event Time: 01:00 [CDT]
Last Update Date: 08/12/2011
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):
BILLY DICKSON (R3DO)
BILLY DICKSON (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 |
POTENTIAL LOSS OF TSC OPERABILITY WHILE PERFORMING PLANNED MAINTENANCE
"A planned maintenance evolution at the Duane Arnold Energy Center (DAEC) will have the potential to remove the plant computer systems (Plant Process Computer, Intranet, and Internet) from service. The TSC would be rendered non-functional with the loss of all computer systems. The replacement and testing of the automatic power transfer relay is expected to de-energize the computer systems for less than 20 minutes at any time.
"If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures. Maintenance will be terminated and power will be restored to the plant computer systems. The restoration of power to all computer systems is estimated to take less than one hour.
"This notification is being made in accordance with 10CFR50.72 (b)(3)(xiii) due to the potential loss of an Emergency Response Facility (ERF). An update will be provided once the plant computer systems power supplies have been restored to normal operation."
The licensee has notified the NRC Resident Inspector.
* * * UPDATE FROM STEVE BREWER TO CHARLES TEAL ON 08/10/11 AT 1305 EDT * * *
The TSC has been restored to operational status.
The licensee has notified the NRC Resident Inspector. Notified R3DO (Dickson).
* * * UPDATE FROM ROBERT SPADING TO JOE O'HARA ON 08/12/11 AT 2205 EDT * * *
The licensee is performing planned maintenance on the TSC automatic power transfer relay which could render the TSC inoperable if power to the TSC computers is lost. Maintenance is expected to commence at 2130 CDT.
The licensee has notified the NRC Resident Inspector. Notified R3DO (Peterson).
"A planned maintenance evolution at the Duane Arnold Energy Center (DAEC) will have the potential to remove the plant computer systems (Plant Process Computer, Intranet, and Internet) from service. The TSC would be rendered non-functional with the loss of all computer systems. The replacement and testing of the automatic power transfer relay is expected to de-energize the computer systems for less than 20 minutes at any time.
"If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures. Maintenance will be terminated and power will be restored to the plant computer systems. The restoration of power to all computer systems is estimated to take less than one hour.
"This notification is being made in accordance with 10CFR50.72 (b)(3)(xiii) due to the potential loss of an Emergency Response Facility (ERF). An update will be provided once the plant computer systems power supplies have been restored to normal operation."
The licensee has notified the NRC Resident Inspector.
* * * UPDATE FROM STEVE BREWER TO CHARLES TEAL ON 08/10/11 AT 1305 EDT * * *
The TSC has been restored to operational status.
The licensee has notified the NRC Resident Inspector. Notified R3DO (Dickson).
* * * UPDATE FROM ROBERT SPADING TO JOE O'HARA ON 08/12/11 AT 2205 EDT * * *
The licensee is performing planned maintenance on the TSC automatic power transfer relay which could render the TSC inoperable if power to the TSC computers is lost. Maintenance is expected to commence at 2130 CDT.
The licensee has notified the NRC Resident Inspector. Notified R3DO (Peterson).
Power Reactor
Event Number: 47139
Facility: HARRIS
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: JOHN DOORHY
HQ OPS Officer: VINCE KLCO
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: JOHN DOORHY
HQ OPS Officer: VINCE KLCO
Notification Date: 08/10/2011
Notification Time: 14:42 [ET]
Event Date: 08/10/2011
Event Time: 07:30 [EDT]
Last Update Date: 08/10/2011
Notification Time: 14:42 [ET]
Event Date: 08/10/2011
Event Time: 07:30 [EDT]
Last Update Date: 08/10/2011
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):
GEORGE HOPPER (R2DO)
GEORGE HOPPER (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 |
EMERGENCY SIRENS OUT OF SERVICE DUE TO A COMMUNICATION PROBLEM
"At approximately 0730 [EDT] on 8/9/11 a siren system communication problem was discovered by Emergency Preparedness personnel at the Harris Nuclear Plant (HNP). Telecommunications was contacted to troubleshoot the problem and at approximately 0820 [EDT] the communications system was restored. A previously scheduled quarterly growl test was conducted with 83 sirens performing satisfactorily. Upon further investigation, it was determined that there were communication failures recorded during the 0600 [EDT] report.
"20 of the 83 sirens were impacted by the communications errors. The previous 0000 [EDT] report indicated no communications errors. Investigation is continuing as to the ability of the sirens to be activated during the period the errors were received. It is likely that the ability to activate the sirens had been lost, therefore, this event is reportable per 10 CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. The cause of the communication errors are believed to be due to radiofrequency disturbances however the investigation is ongoing.
"In the event that the sirens had been needed, the State of North Carolina and all four counties within the 10-mile emergency planning zone would have implemented mobile route alerting, as detailed in the Emergency Plan."
The licensee notified the NRC Resident Inspector.
"At approximately 0730 [EDT] on 8/9/11 a siren system communication problem was discovered by Emergency Preparedness personnel at the Harris Nuclear Plant (HNP). Telecommunications was contacted to troubleshoot the problem and at approximately 0820 [EDT] the communications system was restored. A previously scheduled quarterly growl test was conducted with 83 sirens performing satisfactorily. Upon further investigation, it was determined that there were communication failures recorded during the 0600 [EDT] report.
"20 of the 83 sirens were impacted by the communications errors. The previous 0000 [EDT] report indicated no communications errors. Investigation is continuing as to the ability of the sirens to be activated during the period the errors were received. It is likely that the ability to activate the sirens had been lost, therefore, this event is reportable per 10 CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. The cause of the communication errors are believed to be due to radiofrequency disturbances however the investigation is ongoing.
"In the event that the sirens had been needed, the State of North Carolina and all four counties within the 10-mile emergency planning zone would have implemented mobile route alerting, as detailed in the Emergency Plan."
The licensee notified the NRC Resident Inspector.