Event Notification Report for August 13, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/12/2010 - 08/13/2010
Power Reactor
Event Number: 46173
Facility: LASALLE
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: TODD GRANLUND
HQ OPS Officer: JOE O'HARA
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: TODD GRANLUND
HQ OPS Officer: JOE O'HARA
Notification Date: 08/13/2010
Notification Time: 14:27 [ET]
Event Date: 08/13/2010
Event Time: 10:56 [CDT]
Last Update Date: 08/13/2010
Notification Time: 14:27 [ET]
Event Date: 08/13/2010
Event Time: 10:56 [CDT]
Last Update Date: 08/13/2010
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):
JAMNES CAMERON (R3DO)
JAMNES CAMERON (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 |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION FOR FISH KILL DUE TO HIGH LAKE TEMPERATURE
"At 1056 CDST on 08/13/10, it was discovered that a fish kill took place in LaSalle County Nuclear Station's cooling lake, due to increased temperatures. Approximately 2,000 fish, primarily gizzard shad, but also included bass and walleye were found by plant workers. As summer air temperatures increased, the cooling lake temperatures increased above 93 degrees F, the threshold at which species susceptible to increased temperature begin to perish. Illinois Department of Natural Resources (IDNR) has been notified that a fish kill has occurred. Efforts are under way to contact the IDNR district fish biologist to quantify the mortality.
"This notification is made in accordance with the LaSalle County Station Facility Operating License, Appendix B, Section 4.1 'Unusual or Important Environmental Events', and 10CFR50.72(b)(2)(xi).
"The licensee notified the NRC Resident Inspector.
"A news release is planned for this event."
"At 1056 CDST on 08/13/10, it was discovered that a fish kill took place in LaSalle County Nuclear Station's cooling lake, due to increased temperatures. Approximately 2,000 fish, primarily gizzard shad, but also included bass and walleye were found by plant workers. As summer air temperatures increased, the cooling lake temperatures increased above 93 degrees F, the threshold at which species susceptible to increased temperature begin to perish. Illinois Department of Natural Resources (IDNR) has been notified that a fish kill has occurred. Efforts are under way to contact the IDNR district fish biologist to quantify the mortality.
"This notification is made in accordance with the LaSalle County Station Facility Operating License, Appendix B, Section 4.1 'Unusual or Important Environmental Events', and 10CFR50.72(b)(2)(xi).
"The licensee notified the NRC Resident Inspector.
"A news release is planned for this event."
Power Reactor
Event Number: 46174
Facility: MILLSTONE
Region: 1 State: CT
Unit: [] [] [3]
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: TIMOTHY HALL
HQ OPS Officer: PETE SNYDER
Region: 1 State: CT
Unit: [] [] [3]
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: TIMOTHY HALL
HQ OPS Officer: PETE SNYDER
Notification Date: 08/13/2010
Notification Time: 20:47 [ET]
Event Date: 08/13/2010
Event Time: 20:10 [EDT]
Last Update Date: 08/13/2010
Notification Time: 20:47 [ET]
Event Date: 08/13/2010
Event Time: 20:10 [EDT]
Last Update Date: 08/13/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
MARC FERDAS (R1DO)
MARC FERDAS (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
VOLUNTARY NOTIFICATION FOR AN ITEM OF REGULATORY INTEREST
"NUREG 1022 provides event reporting guidelines. The NRC encourages voluntary reporting of items of potential regulatory interest that do not meet any reporting criteria. Dominion Nuclear Connecticut (DNC) has elected to shut down Millstone Power Station Unit 3 to repair a small leak in the residual heat removal system connected to the reactor coolant system. The leak is in the vicinity of a component that was recently identified as not being in full compliance with its design requirements. Although the leak does not appear to be associated with the non-conforming component, it is inaccessible while the unit is operating. Therefore, DNC has elected to shut down the unit, repair the leak, and address the non-conformance.
"The NRC Senior Resident Inspector has been notified."
"NUREG 1022 provides event reporting guidelines. The NRC encourages voluntary reporting of items of potential regulatory interest that do not meet any reporting criteria. Dominion Nuclear Connecticut (DNC) has elected to shut down Millstone Power Station Unit 3 to repair a small leak in the residual heat removal system connected to the reactor coolant system. The leak is in the vicinity of a component that was recently identified as not being in full compliance with its design requirements. Although the leak does not appear to be associated with the non-conforming component, it is inaccessible while the unit is operating. Therefore, DNC has elected to shut down the unit, repair the leak, and address the non-conformance.
"The NRC Senior Resident Inspector has been notified."