Event Notification Report for August 05, 2019
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/04/2019 - 08/05/2019
Power Reactor
Event Number: 54201
Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: RONALD WALTERS
HQ OPS Officer: THOMAS KENDZIA
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: RONALD WALTERS
HQ OPS Officer: THOMAS KENDZIA
Notification Date: 08/05/2019
Notification Time: 17:06 [ET]
Event Date: 08/05/2019
Event Time: 09:36 [CDT]
Last Update Date: 08/05/2019
Notification Time: 17:06 [ET]
Event Date: 08/05/2019
Event Time: 09:36 [CDT]
Last Update Date: 08/05/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
GREG WARNICK (R4DO)
GREG WARNICK (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 |
SECONDARY CONTAINMENT PERSONNEL DOOR UNABLE TO BE CLOSED AND LATCHED
"On August 5, 2019, at 0936 CDT, Grand Gulf entered Technical Specification (TS) 3.6.4.1 due to a Secondary Containment personnel door, 1A401B, not being able to meet its design function. Door 1A401B was unable to be closed and latched. This condition is being reported as a loss of safety function. The station also entered 05-S-01-EP-4, Auxiliary Building Control (Secondary Containment) to address Auxiliary Building differential pressure due to the opened Secondary Containment penetration.
"Actions were taken to close and latch Door 1A401B. Secondary Containment has been declared operable. TS 3.6.4.1 and 05-S-01-EP-4 were exited.
"The NRC Resident Inspector was notified of the condition."
"On August 5, 2019, at 0936 CDT, Grand Gulf entered Technical Specification (TS) 3.6.4.1 due to a Secondary Containment personnel door, 1A401B, not being able to meet its design function. Door 1A401B was unable to be closed and latched. This condition is being reported as a loss of safety function. The station also entered 05-S-01-EP-4, Auxiliary Building Control (Secondary Containment) to address Auxiliary Building differential pressure due to the opened Secondary Containment penetration.
"Actions were taken to close and latch Door 1A401B. Secondary Containment has been declared operable. TS 3.6.4.1 and 05-S-01-EP-4 were exited.
"The NRC Resident Inspector was notified of the condition."
Part 21
Event Number: 54206
Rep Org: COLUMBIA GENERATING STATION
Licensee: SPECTRUM TECHNOLOGIES
Region: 4
City: RICHLAND State: WA
County:
License #:
Agreement: Y
Docket: 05000397
NRC Notified By: DON GREGOIRE
HQ OPS Officer: CATY NOLAN
Licensee: SPECTRUM TECHNOLOGIES
Region: 4
City: RICHLAND State: WA
County:
License #:
Agreement: Y
Docket: 05000397
NRC Notified By: DON GREGOIRE
HQ OPS Officer: CATY NOLAN
Notification Date: 08/08/2019
Notification Time: 17:03 [ET]
Event Date: 08/05/2019
Event Time: 15:19 [PDT]
Last Update Date: 08/08/2019
Notification Time: 17:03 [ET]
Event Date: 08/05/2019
Event Time: 15:19 [PDT]
Last Update Date: 08/08/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
Person (Organization):
DAN SCHROEDER (R1DO)
GERALD MCCOY (R2DO)
PATRICIA PELKE (R3DO)
GREG WARNICK (R4DO)
- PART 21/50.55 REACTORS (EMAIL)
DAN SCHROEDER (R1DO)
GERALD MCCOY (R2DO)
PATRICIA PELKE (R3DO)
GREG WARNICK (R4DO)
- PART 21/50.55 REACTORS (EMAIL)
PART 21 NOTIFICATION - SPECTRUM TECHNOLOGIES CONTROL POWER TRANSFORMER
"Pursuant to 10 CFR 21.21(d)(3)(i), this is a non-emergency notification by Energy Northwest concerning a defect on a control power transformer (CPT) resulting in a failed starter coil while in service at Columbia Generating Station. The defect was associated with a CPT provided by Spectrum Technologies (model Micron B150-2957-1).
"On June 14, 2019, a failure analysis was completed that determined that the failure of the coil occurred because the starter coil was exposed to chronic elevated temperatures. These elevated temperatures were caused by the associated control power transformer (CPT) secondary voltage being maintained outside the coil's rated voltage range. Previously on June 10, 2019, it was determined that the CPT installed in the Spectrum Technologies motor starter assembly did not meet procurement specifications resulting in a turns ratio that produced higher voltages on the motor starter coil than its rated voltage. This led to overheating and breakdown of the coil insulation that created a short between two windings.
"On August 5, 2019, Energy Northwest completed a Part 21 evaluation in accordance with 10 CFR 21.21(a)(1) and determined that this deviation could create a substantial safety hazard as defined in 10 CFR 21.3.
"The NRC Resident Inspector has been notified."
The licensee has 14 Spectrum transformers that are continuously energized that could be affected. The one transformer that experienced the failure was out of service for maintenance at the time of discovery. Four other coils were inspected for extent of condition and no more failures were found.
"Pursuant to 10 CFR 21.21(d)(3)(i), this is a non-emergency notification by Energy Northwest concerning a defect on a control power transformer (CPT) resulting in a failed starter coil while in service at Columbia Generating Station. The defect was associated with a CPT provided by Spectrum Technologies (model Micron B150-2957-1).
"On June 14, 2019, a failure analysis was completed that determined that the failure of the coil occurred because the starter coil was exposed to chronic elevated temperatures. These elevated temperatures were caused by the associated control power transformer (CPT) secondary voltage being maintained outside the coil's rated voltage range. Previously on June 10, 2019, it was determined that the CPT installed in the Spectrum Technologies motor starter assembly did not meet procurement specifications resulting in a turns ratio that produced higher voltages on the motor starter coil than its rated voltage. This led to overheating and breakdown of the coil insulation that created a short between two windings.
"On August 5, 2019, Energy Northwest completed a Part 21 evaluation in accordance with 10 CFR 21.21(a)(1) and determined that this deviation could create a substantial safety hazard as defined in 10 CFR 21.3.
"The NRC Resident Inspector has been notified."
The licensee has 14 Spectrum transformers that are continuously energized that could be affected. The one transformer that experienced the failure was out of service for maintenance at the time of discovery. Four other coils were inspected for extent of condition and no more failures were found.