Event Notification Report for April 11, 2018
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/10/2018 - 04/11/2018
Power Reactor
Event Number: 53323
Facility: THREE MILE ISLAND
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] B&W-L-LP
NRC Notified By: JOSH EVANS
HQ OPS Officer: JEFF HERRERA
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] B&W-L-LP
NRC Notified By: JOSH EVANS
HQ OPS Officer: JEFF HERRERA
Notification Date: 04/11/2018
Notification Time: 09:09 [ET]
Event Date: 04/11/2018
Event Time: 05:42 [EDT]
Last Update Date: 04/11/2018
Notification Time: 09:09 [ET]
Event Date: 04/11/2018
Event Time: 05:42 [EDT]
Last Update Date: 04/11/2018
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):
DON JACKSON (R1DO)
DON JACKSON (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION DUE TO HYDRAZINE SPILL
"On April 11, 2018, a hydrazine spill resulted in measurable hydrazine levels released at the station outfall to the Susquehanna River over an approximately 16 minute time period. The hydrazine levels exceeded the station NPDES [National Pollutant Discharge Elimination System] permit effluent limitations. The Industrial Waste Treatment system release to the river was secured and no further hydrazine was released to the river.
"The concentrations released did not threaten the downstream users or the environment. Pennsylvania Department of Environmental Protection was notified of the NPDES non-compliance on April 11, 2018 at 0542 EDT.
"Pursuant to 10 CFR 50.72(b)(2)(xi), this notification satisfies the requirement to notify the NRC of the occurrence of any event or situation related to the health and safety of the public or onsite personnel, or protection of the environment, for which notification to other government agencies has been made.
"The NRC Resident Inspector has been notified."
"On April 11, 2018, a hydrazine spill resulted in measurable hydrazine levels released at the station outfall to the Susquehanna River over an approximately 16 minute time period. The hydrazine levels exceeded the station NPDES [National Pollutant Discharge Elimination System] permit effluent limitations. The Industrial Waste Treatment system release to the river was secured and no further hydrazine was released to the river.
"The concentrations released did not threaten the downstream users or the environment. Pennsylvania Department of Environmental Protection was notified of the NPDES non-compliance on April 11, 2018 at 0542 EDT.
"Pursuant to 10 CFR 50.72(b)(2)(xi), this notification satisfies the requirement to notify the NRC of the occurrence of any event or situation related to the health and safety of the public or onsite personnel, or protection of the environment, for which notification to other government agencies has been made.
"The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 53326
Facility: HARRIS
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: SARAH MCDANIEL
HQ OPS Officer: HOWIE CROUCH
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: SARAH MCDANIEL
HQ OPS Officer: HOWIE CROUCH
Notification Date: 04/11/2018
Notification Time: 20:56 [ET]
Event Date: 04/11/2018
Event Time: 14:30 [EDT]
Last Update Date: 04/11/2018
Notification Time: 20:56 [ET]
Event Date: 04/11/2018
Event Time: 14:30 [EDT]
Last Update Date: 04/11/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION
Person (Organization):
MARVIN SYKES (R2DO)
MARVIN SYKES (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
DEGRADED CONDITION DUE TO INDICATION DURING ULTRASONIC EXAMINATION OF REACTOR NOZZLE PENETRATION
"On April 11, 2018, while the Harris Nuclear Plant was shut down for a scheduled refueling outage, the reactor vessel head penetrations were being examined in accordance with the lnservice Inspection Program. Ultrasonic examinations identified a flaw in the head penetration nozzle number 33. The unit is in a safe and stable condition. The flaw will be repaired prior to startup from the refueling outage.
"The flaw and repair have no impact on the health and safety of the public or station employees. The NRC Resident Inspector has been notified."
"On April 11, 2018, while the Harris Nuclear Plant was shut down for a scheduled refueling outage, the reactor vessel head penetrations were being examined in accordance with the lnservice Inspection Program. Ultrasonic examinations identified a flaw in the head penetration nozzle number 33. The unit is in a safe and stable condition. The flaw will be repaired prior to startup from the refueling outage.
"The flaw and repair have no impact on the health and safety of the public or station employees. The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 53324
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DANNY JAMES
HQ OPS Officer: DONALD NORWOOD
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DANNY JAMES
HQ OPS Officer: DONALD NORWOOD
Notification Date: 04/11/2018
Notification Time: 10:14 [ET]
Event Date: 04/11/2018
Event Time: 01:50 [CDT]
Last Update Date: 04/11/2018
Notification Time: 10:14 [ET]
Event Date: 04/11/2018
Event Time: 01:50 [CDT]
Last Update Date: 04/11/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
RAY KELLAR (R4DO)
RAY KELLAR (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
CONDITION THAT COULD IMPAIR FUNCTION OF CONTROL BUILDING AC SYSTEM
"At time 0150 CDT on April 11, 2018, a condition was identified that could impair the ability of the Control Building Air Conditioning System to perform its design function.
"Engineering determined that the time delay relays HVKA11-80YB or HVKA11-80YD (Division II chilled water LOW FLOW relays) could fail in a manner that challenges the design safety function of the Control Building Chilled Water System during a Loss of Offsite Power (LOP) Event. A failure of the time delay relay HVKA11-80YB or HVKA11-80YD (Division II chilled water LOW FLOW relays) to provide the time delay function would cause both the Division I and Division II HVK chilled water pumps to start after a LOP, which in turn could hinder the auto start of either Division I or Division II chillers.
"Currently the Chilled Water System is otherwise operating as designed. All operator actions are in place to ensure the plant meets all required designed safety system functions. Work is currently underway to correct this design vulnerability.
"The NRC Resident Inspector has been notified of this condition."
"At time 0150 CDT on April 11, 2018, a condition was identified that could impair the ability of the Control Building Air Conditioning System to perform its design function.
"Engineering determined that the time delay relays HVKA11-80YB or HVKA11-80YD (Division II chilled water LOW FLOW relays) could fail in a manner that challenges the design safety function of the Control Building Chilled Water System during a Loss of Offsite Power (LOP) Event. A failure of the time delay relay HVKA11-80YB or HVKA11-80YD (Division II chilled water LOW FLOW relays) to provide the time delay function would cause both the Division I and Division II HVK chilled water pumps to start after a LOP, which in turn could hinder the auto start of either Division I or Division II chillers.
"Currently the Chilled Water System is otherwise operating as designed. All operator actions are in place to ensure the plant meets all required designed safety system functions. Work is currently underway to correct this design vulnerability.
"The NRC Resident Inspector has been notified of this condition."