Event Notification Report for October 01, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/30/2024 - 10/01/2024
Non-Agreement State
Event Number: 57358
Rep Org: Mistras Group
Licensee: Mistras Group
Region: 4
City: Great Falls State: MT
County:
License #: 12-16559-02
Agreement: N
Docket:
NRC Notified By: Matt Kim
HQ OPS Officer: Robert A. Thompson
Licensee: Mistras Group
Region: 4
City: Great Falls State: MT
County:
License #: 12-16559-02
Agreement: N
Docket:
NRC Notified By: Matt Kim
HQ OPS Officer: Robert A. Thompson
Notification Date: 10/01/2024
Notification Time: 16:40 [ET]
Event Date: 10/01/2024
Event Time: 11:30 [MDT]
Last Update Date: 10/02/2024
Notification Time: 16:40 [ET]
Event Date: 10/01/2024
Event Time: 11:30 [MDT]
Last Update Date: 10/02/2024
Emergency Class: Non Emergency
10 CFR Section:
30.50(b)(2) - Safety Equipment Failure
10 CFR Section:
30.50(b)(2) - Safety Equipment Failure
Person (Organization):
Gepford, Heather (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Gepford, Heather (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
RADIOGRAPHY CAMERA FAILURE
The following is a summary of information provided by Mistras via phone:
A Mistras two-person radiography crew was working at a customer site with a 61 Ci Ir-192 source from an elevated platform. The crew went to retract the source, but it did not move after several attempts. The crew then realized the source was disconnected from the drive cable.
The crew expanded the radiography boundaries to limit exposure to 2 mR/hr. The crew notified site personnel and is monitoring the posted boundaries until the source is secured. Additional Mistras personnel are en-route to retrieve the source.
No personnel exposures due to the malfunction have occurred.
* * * UPDATE ON 10/02/24 AT 0900 EDT FROM MATT KIM TO ERIC SIMPSON * * *
The following is a summary of information provided by Mistras via phone:
On October 2, 2024, at 0120 EDT, a repair crew arrived onsite to perform repairs to the radiography camera. The crew successfully repaired the device and retracted the source into the shielded position at approximately 0320 EDT.
No personnel overexposures occurred due to the radiography camera failure.
Notified the R4DO (Gepford) and NMSS Events Notifications via email.
The following is a summary of information provided by Mistras via phone:
A Mistras two-person radiography crew was working at a customer site with a 61 Ci Ir-192 source from an elevated platform. The crew went to retract the source, but it did not move after several attempts. The crew then realized the source was disconnected from the drive cable.
The crew expanded the radiography boundaries to limit exposure to 2 mR/hr. The crew notified site personnel and is monitoring the posted boundaries until the source is secured. Additional Mistras personnel are en-route to retrieve the source.
No personnel exposures due to the malfunction have occurred.
* * * UPDATE ON 10/02/24 AT 0900 EDT FROM MATT KIM TO ERIC SIMPSON * * *
The following is a summary of information provided by Mistras via phone:
On October 2, 2024, at 0120 EDT, a repair crew arrived onsite to perform repairs to the radiography camera. The crew successfully repaired the device and retracted the source into the shielded position at approximately 0320 EDT.
No personnel overexposures occurred due to the radiography camera failure.
Notified the R4DO (Gepford) and NMSS Events Notifications via email.
Power Reactor
Event Number: 57424
Facility: Seabrook
Region: 1 State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: Shaun Matthews
HQ OPS Officer: Bill Nytko
Region: 1 State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: Shaun Matthews
HQ OPS Officer: Bill Nytko
Notification Date: 11/14/2024
Notification Time: 10:58 [ET]
Event Date: 10/01/2024
Event Time: 07:38 [EST]
Last Update Date: 11/15/2024
Notification Time: 10:58 [ET]
Event Date: 10/01/2024
Event Time: 07:38 [EST]
Last Update Date: 11/15/2024
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):
Lilliendahl, Jon (R1DO)
Lilliendahl, Jon (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 99 | Power Operation | 100 | Power Operation |
PART 21 - CONTROL RELAY DEFECT
The following information was provided by the licensee via phone and email:
"NextEra Energy Seabrook LLC. makes the following notification under 10 CFR 21.21(d)(3)(i) of a defect found in a GE - Hitachi Relay, CR120B (Model #DD945E118P0060) during pre-installation bench testing. During bench testing, the relay failed to energize and transfer all associated contacts. The relay was purchased from GE - Hitachi (GEH) as safety-related, GE CR-120B relays. All GE CR-120B relays that were purchased in the same batch as the failed relay were located and quarantined in order to be returned to GEH for forensic testing. NextEra Energy Seabrook, LLC has concluded that this defect constitutes a substantial safety hazard (SSH). A SSH exists because the nature of the defect was such that, if installed in certain safety-related applications and failed, it would have prevented the fulfillment of a safety function. On November 12, 2024, the Seabrook site Vice President was notified of the requirement to report this event under 10 CFR 21.21. This is a non-emergency notification required by 10 CFR 21.21(d)(3)(i). A written notification will be provided in accordance with 10 CFR 21.21(d)(3)(ii).
"Because the defect was discovered prior to installation, there was no impact to safety-related equipment.
"The NRC Senior Resident Inspector has been informed."
The following information was provided by the licensee via phone and email:
"NextEra Energy Seabrook LLC. makes the following notification under 10 CFR 21.21(d)(3)(i) of a defect found in a GE - Hitachi Relay, CR120B (Model #DD945E118P0060) during pre-installation bench testing. During bench testing, the relay failed to energize and transfer all associated contacts. The relay was purchased from GE - Hitachi (GEH) as safety-related, GE CR-120B relays. All GE CR-120B relays that were purchased in the same batch as the failed relay were located and quarantined in order to be returned to GEH for forensic testing. NextEra Energy Seabrook, LLC has concluded that this defect constitutes a substantial safety hazard (SSH). A SSH exists because the nature of the defect was such that, if installed in certain safety-related applications and failed, it would have prevented the fulfillment of a safety function. On November 12, 2024, the Seabrook site Vice President was notified of the requirement to report this event under 10 CFR 21.21. This is a non-emergency notification required by 10 CFR 21.21(d)(3)(i). A written notification will be provided in accordance with 10 CFR 21.21(d)(3)(ii).
"Because the defect was discovered prior to installation, there was no impact to safety-related equipment.
"The NRC Senior Resident Inspector has been informed."