Event Notification Report for June 18, 2016
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/17/2016 - 06/18/2016
Power Reactor
Event Number: 52020
Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: RANDY SAND
HQ OPS Officer: MARK ABRAMOVITZ
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: RANDY SAND
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 06/18/2016
Notification Time: 06:25 [ET]
Event Date: 06/18/2016
Event Time: 02:59 [CDT]
Last Update Date: 06/18/2016
Notification Time: 06:25 [ET]
Event Date: 06/18/2016
Event Time: 02:59 [CDT]
Last Update Date: 06/18/2016
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):
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 |
SPURIOUS EMERGENCY SIREN ACTIVATION
"On 6/18/16 at approximately 0259 CDT, the Monticello Nuclear Generating Plant was notified by the Wright County Sheriffs Office of a spurious actuation of one emergency siren in the city of Monticello. As a result, this issue is being reported under 10CFR50.72(b)(2)(xi) for notifications to other off site government agencies as the licensee was notified by the Wright County Sheriff's Office. The source of the siren activation has not been determined. Wright County Sheriff's Office successfully deactivated the siren at 0322 CDT. There was no impact to the health and safety of the public as a result of this event as the offsite response capabilities remain functional with a single siren failure. The site is operating normally with no emergency conditions present. The NRC Resident Inspector has been notified."
The licensee will notify the State of Minnesota concerning this event.
"On 6/18/16 at approximately 0259 CDT, the Monticello Nuclear Generating Plant was notified by the Wright County Sheriffs Office of a spurious actuation of one emergency siren in the city of Monticello. As a result, this issue is being reported under 10CFR50.72(b)(2)(xi) for notifications to other off site government agencies as the licensee was notified by the Wright County Sheriff's Office. The source of the siren activation has not been determined. Wright County Sheriff's Office successfully deactivated the siren at 0322 CDT. There was no impact to the health and safety of the public as a result of this event as the offsite response capabilities remain functional with a single siren failure. The site is operating normally with no emergency conditions present. The NRC Resident Inspector has been notified."
The licensee will notify the State of Minnesota concerning this event.
Power Reactor
Event Number: 52021
Facility: WATTS BAR
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BRIAN McILANY
HQ OPS Officer: STEVE SANDIN
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BRIAN McILANY
HQ OPS Officer: STEVE SANDIN
Notification Date: 06/18/2016
Notification Time: 14:05 [ET]
Event Date: 06/18/2016
Event Time: 11:06 [EDT]
Last Update Date: 06/18/2016
Notification Time: 14:05 [ET]
Event Date: 06/18/2016
Event Time: 11:06 [EDT]
Last Update Date: 06/18/2016
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):
BINOY DESAI (R2DO)
BINOY DESAI (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 92 | Power Operation | 92 | Power Operation |
| 2 | N | Y | 33 | Power Operation | 33 | Power Operation |
OFFSITE NOTIFICATIONS TO USCG NATIONAL RESPONSE CENTER AND TEMA
"On 6/18/16 at 1106 EDT, TVA [Tennessee Valley Authority] notified the National Response Center that Watts Bar Nuclear Plant has an oil sheen on the Cooling Tower Basin.
"1. Oil sheen was observed within the Cooling Tower basin at WBN [Watts Bar Nuclear]. Sheen was light brown to red and did not cover the entire Cooling Tower basin. Estimate of oil released into the Cooling Tower basin is less than 1 quart.
"2. No oil sheen was visible in the Tennessee River from the bank above the diffuser pipes.
"3. Notifications were also made to TEMA [Tennessee Emergency Management Agency].
"4. Follow-up observations within one hour of the sheen being reported indicated that the oil sheen had dissipated and was no longer visible. Oil levels from the suspected source did not indicate any change in oil reservoir levels.
"Unit 1 remains in Mode 1 at 92% power - reduced power due to main condenser back pressure limits
"Unit 2 remains in Mode 1 at 33% power - initial startup testing
"This event is reportable under 10 CFR 50.72(b)(2)(xi) as a condition that was reported to an outside Government Agency.
"The NRC Resident Inspector has been notified."
"On 6/18/16 at 1106 EDT, TVA [Tennessee Valley Authority] notified the National Response Center that Watts Bar Nuclear Plant has an oil sheen on the Cooling Tower Basin.
"1. Oil sheen was observed within the Cooling Tower basin at WBN [Watts Bar Nuclear]. Sheen was light brown to red and did not cover the entire Cooling Tower basin. Estimate of oil released into the Cooling Tower basin is less than 1 quart.
"2. No oil sheen was visible in the Tennessee River from the bank above the diffuser pipes.
"3. Notifications were also made to TEMA [Tennessee Emergency Management Agency].
"4. Follow-up observations within one hour of the sheen being reported indicated that the oil sheen had dissipated and was no longer visible. Oil levels from the suspected source did not indicate any change in oil reservoir levels.
"Unit 1 remains in Mode 1 at 92% power - reduced power due to main condenser back pressure limits
"Unit 2 remains in Mode 1 at 33% power - initial startup testing
"This event is reportable under 10 CFR 50.72(b)(2)(xi) as a condition that was reported to an outside Government Agency.
"The NRC Resident Inspector has been notified."