Event Notification Report for November 03, 2019
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/02/2019 - 11/03/2019
EVENT NUMBERS
54367
Power Reactor
Event Number: 54367
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT KARL
HQ OPS Officer: CATY NOLAN
Region: 4 State: TX
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT KARL
HQ OPS Officer: CATY NOLAN
Notification Date: 11/03/2019
Notification Time: 09:23 [ET]
Event Date: 11/03/2019
Event Time: 08:00 [CST]
Last Update Date: 12/10/2019
Notification Time: 09:23 [ET]
Event Date: 11/03/2019
Event Time: 08:00 [CST]
Last Update Date: 12/10/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
JOHN DIXON (R4DO)
JOHN DIXON (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
PLANNED LOSS OF EMERGENCY RESPONSE FACILITIES AND EQUIPMENT
"At 0800 CST on November 3, 2019, Comanche Peak began a planned modification on the Unit 2 Plant Computer System. During this modification, the ability to perform emergency assessment in the Technical Support Center (TSC) and the Emergency Operations Facility (EOF) will be impacted. Since the ability to perform emergency assessment is not expected to be restored within 72 hours, this is reportable per 10 CFR 50.72(b)(3)(xiii) as an event that results in a loss of emergency assessment capability.
"During this modification, the Control Room will continue to have the ability to perform emergency assessment. If an Alert, Site Area Emergency, or General Emergency is declared during this modification, communicators dedicated to performing emergency assessment will be stationed in the Control Room, TSC, and EOF. The Plant Computer System modification is scheduled to be completed on November 24, 2019 and a follow-up ENS notification will be made once the Unit 2 Plant Computer System is declared functional.
"The NRC Resident Inspector has been informed."
* * * UPDATE FROM MATT KARL TO HOWIE CROUCH AT 1104 EST ON 12/10/19 * * *
Unit 2 Plant Computer System has returned to service at 0756 CST on 12/10/19.
The NRC Resident Inspector has been notified. Notified R4DO (Groom).
"At 0800 CST on November 3, 2019, Comanche Peak began a planned modification on the Unit 2 Plant Computer System. During this modification, the ability to perform emergency assessment in the Technical Support Center (TSC) and the Emergency Operations Facility (EOF) will be impacted. Since the ability to perform emergency assessment is not expected to be restored within 72 hours, this is reportable per 10 CFR 50.72(b)(3)(xiii) as an event that results in a loss of emergency assessment capability.
"During this modification, the Control Room will continue to have the ability to perform emergency assessment. If an Alert, Site Area Emergency, or General Emergency is declared during this modification, communicators dedicated to performing emergency assessment will be stationed in the Control Room, TSC, and EOF. The Plant Computer System modification is scheduled to be completed on November 24, 2019 and a follow-up ENS notification will be made once the Unit 2 Plant Computer System is declared functional.
"The NRC Resident Inspector has been informed."
* * * UPDATE FROM MATT KARL TO HOWIE CROUCH AT 1104 EST ON 12/10/19 * * *
Unit 2 Plant Computer System has returned to service at 0756 CST on 12/10/19.
The NRC Resident Inspector has been notified. Notified R4DO (Groom).