Event Notification Report for December 10, 2019
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/09/2019 - 12/10/2019
Non-Power Reactor
Event Number: 54436
Rep Org: UNIV OF MISSOURI-COLUMBIA
Licensee: UNIVERSITY OF MISSOURI
Region: 0
City: COLUMBIA State: MO
County: BOONE
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: JEREMY CUSTER
HQ OPS Officer: KARL DIEDERICH
Licensee: UNIVERSITY OF MISSOURI
Region: 0
City: COLUMBIA State: MO
County: BOONE
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: JEREMY CUSTER
HQ OPS Officer: KARL DIEDERICH
Notification Date: 12/11/2019
Notification Time: 09:10 [ET]
Event Date: 12/10/2019
Event Time: 00:12 [CST]
Last Update Date: 12/11/2019
Notification Time: 09:10 [ET]
Event Date: 12/10/2019
Event Time: 00:12 [CST]
Last Update Date: 12/11/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
GEOFFREY WERTZ (NPR PM)
ELIZABETH REED
GEOFFREY WERTZ (NPR PM)
ELIZABETH REED
TECHNICAL SPECIFICATION VIOLATION REQUIRING SHUTDOWN
The following information was received via phone and email.
"On December 10, 2019, at 0012 CST, the University of Missouri-Columbia Research Reactor (MURR) was shut down due to a failure of the regulating blade drive mechanism during reactor operation. MURR was not in compliance with all Limiting Conditions for Operations (LCOs), specifically S 3.2.a, which states, 'All control blades, including the regulating blade, shall be operable during reactor operation.' The regulating blade drive mechanism was removed, repaired, reinstalled, and all its functions were tested satisfactorily. Permission from the Reactor Facility Director was obtained per TS 6.6.c(4) prior to starting up the reactor later on December 10."
Notification to the NRC Operations Center is required per TS 6.6.c(1) to report that an Abnormal Occurrence, as defined by TS 1.1.b, occurred. MURR was not in compliance with all of the Limiting Conditions for Operations as established in TS Section 3.0.
"A detailed event report will follow within 14 days as required by TS 6.6.c(3)."
The following information was received via phone and email.
"On December 10, 2019, at 0012 CST, the University of Missouri-Columbia Research Reactor (MURR) was shut down due to a failure of the regulating blade drive mechanism during reactor operation. MURR was not in compliance with all Limiting Conditions for Operations (LCOs), specifically S 3.2.a, which states, 'All control blades, including the regulating blade, shall be operable during reactor operation.' The regulating blade drive mechanism was removed, repaired, reinstalled, and all its functions were tested satisfactorily. Permission from the Reactor Facility Director was obtained per TS 6.6.c(4) prior to starting up the reactor later on December 10."
Notification to the NRC Operations Center is required per TS 6.6.c(1) to report that an Abnormal Occurrence, as defined by TS 1.1.b, occurred. MURR was not in compliance with all of the Limiting Conditions for Operations as established in TS Section 3.0.
"A detailed event report will follow within 14 days as required by TS 6.6.c(3)."
Power Reactor
Event Number: 54433
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT KARL
HQ OPS Officer: HOWIE CROUCH
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT KARL
HQ OPS Officer: HOWIE CROUCH
Notification Date: 12/10/2019
Notification Time: 11:04 [ET]
Event Date: 12/10/2019
Event Time: 09:20 [CST]
Last Update Date: 01/24/2020
Notification Time: 11:04 [ET]
Event Date: 12/10/2019
Event Time: 09:20 [CST]
Last Update Date: 01/24/2020
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):
JEREMY GROOM (R4DO)
JEREMY GROOM (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 |
PLANNED LOSS OF EMERGENCY RESPONSE FACILITIES AND EQUIPMENT
"At 0920 CST on December 10, 2019, Comanche Peak began a planned modification on the Unit 1 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 10CFR50.72(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 December 22, 2019, and a follow-up ENS notification will be made once the Unit 1 Plant Computer System is declared functional.
"The NRC Resident Inspector has been informed."
* * * UPDATE ON 1/24/20 AT 1034 EST FROM THOMAS BOWDEN TO RODNEY CLAGG * * *
Licensee provided an update to inform that as of 0853 CST on 1/24/20, the modification is complete and the emergency assessment capabilities of the TSC and EOF have been restored.
Notified R4DO (Silva)
"At 0920 CST on December 10, 2019, Comanche Peak began a planned modification on the Unit 1 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 10CFR50.72(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 December 22, 2019, and a follow-up ENS notification will be made once the Unit 1 Plant Computer System is declared functional.
"The NRC Resident Inspector has been informed."
* * * UPDATE ON 1/24/20 AT 1034 EST FROM THOMAS BOWDEN TO RODNEY CLAGG * * *
Licensee provided an update to inform that as of 0853 CST on 1/24/20, the modification is complete and the emergency assessment capabilities of the TSC and EOF have been restored.
Notified R4DO (Silva)