Event Notification Report for June 12, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/11/2021 - 06/12/2021
Power Reactor
Event Number: 55304
Facility: Comanche Peak
Region: 4 State: TX
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Mitchell
HQ OPS Officer: Jeffrey Whited
Region: 4 State: TX
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Mitchell
HQ OPS Officer: Jeffrey Whited
Notification Date: 06/12/2021
Notification Time: 22:00 [ET]
Event Date: 06/12/2021
Event Time: 17:25 [CDT]
Last Update Date: 06/12/2021
Notification Time: 22:00 [ET]
Event Date: 06/12/2021
Event Time: 17:25 [CDT]
Last Update Date: 06/12/2021
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):
JOSEY, JEFFREY (R4)
JOSEY, JEFFREY (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Hot Standby | 0 | Hot Standby |
EN Revision Imported Date: 7/12/2021
EN Revision Text: MAIN STEAM LINE (MSL) RADIATION MONITOR NON-FUNCTIONAL
"At time 1725 CDT on 06/12/21, Main Steam Line 2-03 Radiation Monitor 2-RE-2327 was declared to be non-functional. With this radiation monitor non-functional, all of the emergency action levels for a steam generator tube rupture in Steam Generator 2-03 could neither be evaluated nor monitored. This unplanned condition is reportable as a loss of assessment capability per 10 CFR 50.72(b)(3)(xiii). Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity. Compensatory measures are in place to assure adequate monitoring capability. Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-03. Corrective actions are being pursued to restore 2-RE-2327 to functional status.
"The NRC Resident Inspector has been notified."
EN Revision Text: MAIN STEAM LINE (MSL) RADIATION MONITOR NON-FUNCTIONAL
"At time 1725 CDT on 06/12/21, Main Steam Line 2-03 Radiation Monitor 2-RE-2327 was declared to be non-functional. With this radiation monitor non-functional, all of the emergency action levels for a steam generator tube rupture in Steam Generator 2-03 could neither be evaluated nor monitored. This unplanned condition is reportable as a loss of assessment capability per 10 CFR 50.72(b)(3)(xiii). Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity. Compensatory measures are in place to assure adequate monitoring capability. Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-03. Corrective actions are being pursued to restore 2-RE-2327 to functional status.
"The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 55305
Facility: Comanche Peak
Region: 4 State: TX
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Mitchell
HQ OPS Officer: Bethany Cecere
Region: 4 State: TX
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Mitchell
HQ OPS Officer: Bethany Cecere
Notification Date: 06/12/2021
Notification Time: 23:57 [ET]
Event Date: 06/12/2021
Event Time: 22:27 [CDT]
Last Update Date: 06/13/2021
Notification Time: 23:57 [ET]
Event Date: 06/12/2021
Event Time: 22:27 [CDT]
Last Update Date: 06/13/2021
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):
JOSEY, JEFFREY (R4)
JOSEY, JEFFREY (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Hot Standby | 0 | Hot Standby |
EN Revision Imported Date: 7/12/2021
EN Revision Text: MAIN STEAM LINE (MSL) RADIATION MONITOR NON-FUNCTIONAL
"At time 2227 CDT on 06/12/21, Main Steam Line 2-01 Radiation Monitor 2-RE-2325 was declared to be non-functional. With this radiation monitor non-functional, all of the emergency action levels for a steam generator tube rupture in Steam Generator 2-01 could neither be evaluated nor monitored. This unplanned condition is reportable as a loss of assessment capability per 10 CFR 50.72(b)(3)(xiii). Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity. Compensatory measures are in place to assure adequate monitoring capability. Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-01. Corrective actions are being pursued to restore 2-RE-2325 to functional status.
"The NRC Resident Inspector has been notified."
EN Revision Text: MAIN STEAM LINE (MSL) RADIATION MONITOR NON-FUNCTIONAL
"At time 2227 CDT on 06/12/21, Main Steam Line 2-01 Radiation Monitor 2-RE-2325 was declared to be non-functional. With this radiation monitor non-functional, all of the emergency action levels for a steam generator tube rupture in Steam Generator 2-01 could neither be evaluated nor monitored. This unplanned condition is reportable as a loss of assessment capability per 10 CFR 50.72(b)(3)(xiii). Comanche Peak Nuclear Power Plant (CPNPP) has assurance of steam generator integrity and fuel cladding integrity. Compensatory measures are in place to assure adequate monitoring capability. Radiation Protection technicians have been briefed on taking local readings with a Geiger-Mueller tube on MSL 2-01. Corrective actions are being pursued to restore 2-RE-2325 to functional status.
"The NRC Resident Inspector has been notified."