Event Notification Report for April 18, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/17/2023 - 04/18/2023
Agreement State
Event Number: 56486
Rep Org: Colorado Dept of Health
Licensee: Denver Scrap Metal Recycle Center
Region: 4
City: Denver State: CO
County:
License #: N/A
Agreement: Y
Docket:
NRC Notified By: Phillip Peterson
HQ OPS Officer: Ian Howard
Licensee: Denver Scrap Metal Recycle Center
Region: 4
City: Denver State: CO
County:
License #: N/A
Agreement: Y
Docket:
NRC Notified By: Phillip Peterson
HQ OPS Officer: Ian Howard
Notification Date: 04/24/2023
Notification Time: 09:22 [ET]
Event Date: 04/18/2023
Event Time: 00:00 [MDT]
Last Update Date: 04/24/2023
Notification Time: 09:22 [ET]
Event Date: 04/18/2023
Event Time: 00:00 [MDT]
Last Update Date: 04/24/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - FOUND RADIOACTIVE SOURCE
The following information was provided by the Colorado Department of Health via email:
"On April 18, 2023, a recycling yard in Denver flagged a load of scrap metal as potentially radioactive. The load was returned to the point of origin and was separated. At that time, a radium-226:beryllium source was identified. The source container was mostly intact. The point of origin (facility name listed above) was able to construct a cement barrier for storing the source until further investigation could be conducted. Measured dose rates around the cement barriers show rates that are indistinguishable from background (gamma and neutron). The markings on the source container indicate the manufacturer as Nuclear Chicago; the model as P21; the activity as 5 mCi radium-226:beryllium; and the reference date as 04/30/1963."
Event Report ID No.: CO230011
The following information was provided by the Colorado Department of Health via email:
"On April 18, 2023, a recycling yard in Denver flagged a load of scrap metal as potentially radioactive. The load was returned to the point of origin and was separated. At that time, a radium-226:beryllium source was identified. The source container was mostly intact. The point of origin (facility name listed above) was able to construct a cement barrier for storing the source until further investigation could be conducted. Measured dose rates around the cement barriers show rates that are indistinguishable from background (gamma and neutron). The markings on the source container indicate the manufacturer as Nuclear Chicago; the model as P21; the activity as 5 mCi radium-226:beryllium; and the reference date as 04/30/1963."
Event Report ID No.: CO230011
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 56480
Facility: Comanche Peak
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Joe Ricks
HQ OPS Officer: Adam Koziol
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Joe Ricks
HQ OPS Officer: Adam Koziol
Notification Date: 04/20/2023
Notification Time: 13:29 [ET]
Event Date: 04/18/2023
Event Time: 16:30 [CDT]
Last Update Date: 06/07/2023
Notification Time: 13:29 [ET]
Event Date: 04/18/2023
Event Time: 16:30 [CDT]
Last Update Date: 06/07/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(A) - Pot Unable To Safe Sd 50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(A) - Pot Unable To Safe Sd 50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Werner, Greg (R4DO)
Werner, Greg (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 |
EN Revision Imported Date: 6/8/2023
EN Revision Text: SAFE SHUTDOWN CAPABILITY AND ACCIDENT MITIGATION
The following information was provided by the licensee via email:
"Notification per 10 CFR 50.72 (b)(3)(v)(A) and (v)(D)
"At time 1630 CDT on 4/18/23, Comanche Peak Unit 1 entered TS (Technical Specification) 3.0.3 for 11 minutes due to declaring Train A component cooling water (CCW) inoperable in conjunction with a Train B centrifugal charging pump (CCP) inoperable for scheduled maintenance. This resulted in an event or condition that could have prevented fulfillment of a safety function, high head injection of the emergency core cooling system.
"CCP 1-02 and fan cooler were tagged out of service at 0400 CDT on 4/18/23 due to scheduled maintenance activities. Containment spray (CT) pump 1-03 seal oil cooler CCW leak was found by a watchstander at 0930 CDT on 4/18/23. Engineering determined that leakage was CCW from a pipe flange weld after insulation removal and could not [determine] operability and notified control room at 1630 CDT on 4/18/23. This placed unit 1 in a TS 3.0.3 condition from 1630 to 1641 CDT for approximately 11 minutes until CCP 1-02 was restored back to operable status. CCW was declared operable at 1912 after CT pump 1-03 seal oil cooler was isolated. CT pump 1-03 remained inoperable until weld repair completed. Train A CT pump 1-03 declared operable at 1211 CDT 4/19/23.
"ENS notification should have been made by 0030 CDT on 4/19/23. This report restores compliance."
The NRC Resident Inspector has been notified.
* * * RETRACTION ON 6/7/2023 AT 1000 EDT FROM CASEY DAVIES TO BILL GOTT * * *
The following information was provided by the licensee via phone and email:
"Although Comanche Peak Unit 1 conservatively entered a limiting condition for operation action statement and performed repairs immediately, further engineering inspection and evaluation concluded that the CCW system was fully able to provide the needed flow to the 1-03 CT pump seal coolers from the time of discovery (0930 CDT) until which time the piping was isolated for repairs. During this period, structural integrity of the joint was maintained, CCW inventory loss remained within acceptable limits, and CCW could perform its intended design and safety functions.
"Based on this revised operability determination, train A CCW was always operable, and TS 3.0.3 did not apply.
"Therefore, reportability requirements per 10 CFR 50.72 (b)(3)(v)(A) and (v)(D) did not apply, and a 60 day LER will not be submitted."
The licensee notified the NRC Resident Inspector.
Notified R4DO (Young)
EN Revision Text: SAFE SHUTDOWN CAPABILITY AND ACCIDENT MITIGATION
The following information was provided by the licensee via email:
"Notification per 10 CFR 50.72 (b)(3)(v)(A) and (v)(D)
"At time 1630 CDT on 4/18/23, Comanche Peak Unit 1 entered TS (Technical Specification) 3.0.3 for 11 minutes due to declaring Train A component cooling water (CCW) inoperable in conjunction with a Train B centrifugal charging pump (CCP) inoperable for scheduled maintenance. This resulted in an event or condition that could have prevented fulfillment of a safety function, high head injection of the emergency core cooling system.
"CCP 1-02 and fan cooler were tagged out of service at 0400 CDT on 4/18/23 due to scheduled maintenance activities. Containment spray (CT) pump 1-03 seal oil cooler CCW leak was found by a watchstander at 0930 CDT on 4/18/23. Engineering determined that leakage was CCW from a pipe flange weld after insulation removal and could not [determine] operability and notified control room at 1630 CDT on 4/18/23. This placed unit 1 in a TS 3.0.3 condition from 1630 to 1641 CDT for approximately 11 minutes until CCP 1-02 was restored back to operable status. CCW was declared operable at 1912 after CT pump 1-03 seal oil cooler was isolated. CT pump 1-03 remained inoperable until weld repair completed. Train A CT pump 1-03 declared operable at 1211 CDT 4/19/23.
"ENS notification should have been made by 0030 CDT on 4/19/23. This report restores compliance."
The NRC Resident Inspector has been notified.
* * * RETRACTION ON 6/7/2023 AT 1000 EDT FROM CASEY DAVIES TO BILL GOTT * * *
The following information was provided by the licensee via phone and email:
"Although Comanche Peak Unit 1 conservatively entered a limiting condition for operation action statement and performed repairs immediately, further engineering inspection and evaluation concluded that the CCW system was fully able to provide the needed flow to the 1-03 CT pump seal coolers from the time of discovery (0930 CDT) until which time the piping was isolated for repairs. During this period, structural integrity of the joint was maintained, CCW inventory loss remained within acceptable limits, and CCW could perform its intended design and safety functions.
"Based on this revised operability determination, train A CCW was always operable, and TS 3.0.3 did not apply.
"Therefore, reportability requirements per 10 CFR 50.72 (b)(3)(v)(A) and (v)(D) did not apply, and a 60 day LER will not be submitted."
The licensee notified the NRC Resident Inspector.
Notified R4DO (Young)