Event Notification Report for September 10, 2021

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
09/09/2021 - 09/10/2021

EVENT NUMBERS
55445 55448 55450 55451 55453
Agreement State
Event Number: 55445
Rep Org: OK DEQ RAD MANAGEMENT
Licensee: Circuit Engineering #8
Region: 4
City: Alva   State: OK
County:
License #: OK-32127-01
Agreement: Y
Docket:
NRC Notified By: Kevin Sampson
HQ OPS Officer: Joanna Bridge
Notification Date: 09/02/2021
Notification Time: 15:30 [ET]
Event Date: 09/01/2021
Event Time: 17:30 [CDT]
Last Update Date: 09/02/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
JOSEY, JEFFREY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
Event Text
EN Revision Imported Date: 9/10/2021

EN Revision Text: AGREEMENT STATE REPORT - DAMAGED GAUGE

The following was received from the state of Oklahoma via e-mail:

"On Sept. 1, 2021 at approximately 1730 CST, [the State] was informed of an incident involving a nuclear gauge which fell from a truck and bent the source rod to the extent that it could not be operated. The source rod was in the shielded position at the time. [It is] believed this occurred sometime the previous day. We will provide more information as it becomes available."


Power Reactor
Event Number: 55448
Facility: Hatch
Region: 2     State: GA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: Ryan Fannin
HQ OPS Officer: Brian Lin
Notification Date: 09/08/2021
Notification Time: 08:40 [ET]
Event Date: 09/08/2021
Event Time: 01:59 [EDT]
Last Update Date: 09/08/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
MILLER, MARK (R2)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
EN Revision Imported Date: 9/10/2021

EN Revision Text: UNIT 1 HIGH PRESSURE COOLANT INJECTION (HPCI) SYSTEM INOPERABLE

At 0159 EDT on 09/08/2021, the HPCI pump discharge valve failed to reopen during a valve surveillance, resulting in the HPCI system being declared INOPERABLE. HPCI does not have a redundant system; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). Reactor Core Isolation Cooling system and low pressure Emergency Core Cooling Systems were OPERABLE during this time.

There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.


Power Reactor
Event Number: 55450
Facility: Summer
Region: 2     State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-AP1000,[3] W-AP1000
NRC Notified By: Tracey Stewart
HQ OPS Officer: Donald Norwood
Notification Date: 09/08/2021
Notification Time: 17:12 [ET]
Event Date: 09/08/2021
Event Time: 13:37 [EDT]
Last Update Date: 09/08/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
Person (Organization):
MILLER, MARK (R2)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
EN Revision Imported Date: 9/10/2021

EN Revision Text: NOTIFICATION OF ENVIRONMENTAL REPORT TO ANOTHER GOVERNMENT AGENCY

"At 1337 [EDT] on 9/8/2021, V.C. Summer reported the overflow of the Nuclear Operations Building Lift Station (LS-3) to the South Carolina Department of Health and Environmental Control. The lift station overflow was due to a broken discharge pipe from Pump 1 to the common discharge header. The overflow was contained in the valve vault, basin gravel, and the nearby concrete surface. None of the overflow reached any storm drains or waters of the state. This release did not exceed any NRC regulations or reporting criteria. This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi).

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."


Power Reactor
Event Number: 55451
Facility: Grand Gulf
Region: 4     State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Gabe Hargrove
HQ OPS Officer: Kerby Scales
Notification Date: 09/09/2021
Notification Time: 04:19 [ET]
Event Date: 09/09/2021
Event Time: 00:33 [CDT]
Last Update Date: 09/09/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
TAYLOR, NICK (R4)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 70 Power Operation 80 Power Operation
Event Text
EN Revision Imported Date: 9/10/2021

EN Revision Text: HIGH PRESSURE CORE SPRAY INOPERABLE

At 0033 CDT on September 9, 2021, Grand Gulf Nuclear Station (GGNS) was operating at 70 percent power when the High Pressure Core Spray (HPCS) was declared inoperable. The inoperability determination was made due to control room annunciations. In accordance with GGNS Technical Specification 3.5.1.B.1, the Reactor Core Isolation Cooling system was verified to be operable. Troubleshooting is in progress.

This event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D) as an event or condition which could have prevented the fulfillment of a safety function.

The NRC Resident Inspector has been notified.


Part 21
Event Number: 55453
Rep Org: AMETEK SOLIDSTATE CONTROLS
Licensee: AMETEK SOLIDSTATE CONTROLS
Region: 3
City: Columbus   State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Ethan Salsbury
HQ OPS Officer: Donald Norwood
Notification Date: 09/09/2021
Notification Time: 13:53 [ET]
Event Date: 09/09/2021
Event Time: 00:00 [EDT]
Last Update Date: 09/09/2021
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
DENTEL, GLENN (R1DO)
MILLER, MARK (R2DO)
RIEMER, KENNETH (R3DO)
TAYLOR, NICK (R4DO)
PART 21/50.55 REACTORS, - (EMAIL)
Event Text
PART 21 REPORT - NONCONFORMING RELAY LED TO FAILURES OF BATTERY CHARGERS

The following is a synopsis of information received via E-mail:

Component Description:
AMETEK Part Number 07-740108-00, K306 relay, used in the float/equalize circuit of AMETEK Battery Chargers. The relay is a solid-state timer manufactured by Omron with manufacturer part number H3CR-A-AC100-240/DC100125.

Problem You Could See:
AMETEK was notified of a condition of a nonconforming K306 relay that led to failures of battery chargers. AEP DC Cook reported a single failure of a K306 Float/Equalize timer relay in a controlled environment where the relay failed to transfer from float to equalize and caused the DC output to fail. Transferring the battery charger to equalize mode is always a manual operation and the float/equalize function is typically used after an outage or a discharge test in order to bring the batteries back to full charge. Before performing a discharge test, the charger should be put in equalize mode. AMETEK was not able to evaluate this specific instance of failure, but it was determined the circuit does not meet the minimum contact current rating. As a result, the operation of the relay may be unreliable and the charger may experience a loss of output when equalize is initiated, failing to charge the batteries. The failed relay was installed in 2017 and was original to the equipment.

Effect on System Performance:
If the charger fails to transfer between float and equalize, the equalize light may turn on, the charger output will fail, voltage will drop below float voltage or to 0, and there will be no charging capabilities. An alarm will indicate Low DC voltage in the event the charger does not transfer between float and equalize. The charger will restart after the AC input breaker is cycled Off and On. The relay should be replaced if the charger output is lost. Other alarm(s) may be included with the design:
- Battery Discharge Alarm
- Low Current Alarm
The battery will charge with float voltage, but will take longer than with equalize voltage (~8-24 hours after charging current stabilizes).

The safety impact is a loss of battery charger output after an event where the float/equalize button is utilized and does not retransfer to equalize for charging. If the charger fails to transfer and the output is lost prior to a safety event, the battery may not be at full capacity for a shutdown. Each utility will need to evaluate the application of the battery charger and the battery it is charging.

Affected Entities:
Alabama Power Company; Arkansas Nuclear One; Atomic Energy of Canada; Constellation Energy; Consumer's Power, Palisades; Dominion - Kewaunee; Dominion Energy; Dominion Inc.; Duke Energy; Duke Power Co.; EM Test (Switzerland) GMBH; Engine Systems; Ergytech Inc.; Exelon; Exelon Generation Co.; First Energy; Formosa Nextech Co.; Framatome Technologies; Georgia Power; Indiana Michigan Power Co.; Millstone Nuclear Power Station; Niagara Mohawk; NPP Krsko; Progress Energy; TVA; TVA Watts Bar; Ulysses - Taiwan Power; and Ulysses System Development.

Ametek Contact: Ametek Solidstate Controls Client Services group, 1-800-222-9079 or 614-846-7500, extension 1.