Event Notification Report for December 05, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/04/2025 - 12/05/2025
Part 21
Event Number: 57243
Rep Org: RSCC dba Marmon
Licensee:
Region: 1
City: East Granby State: CT
County:
License #:
Agreement: N
Docket:
NRC Notified By: Phillip Sargenski
HQ OPS Officer: Adam Koziol
Licensee:
Region: 1
City: East Granby State: CT
County:
License #:
Agreement: N
Docket:
NRC Notified By: Phillip Sargenski
HQ OPS Officer: Adam Koziol
Notification Date: 07/25/2024
Notification Time: 11:05 [ET]
Event Date: 07/23/2024
Event Time: 00:00 [EDT]
Last Update Date: 12/04/2025
Notification Time: 11:05 [ET]
Event Date: 07/23/2024
Event Time: 00:00 [EDT]
Last Update Date: 12/04/2025
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)
Feliz-Adorno, Nestor (R3DO)
Azua, Ray (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
Lilliendahl, Jon (R1DO)
Feliz-Adorno, Nestor (R3DO)
Azua, Ray (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
EN Revision Imported Date: 12/5/2025
EN Revision Text: PART 21 REPORT - NON-COMPLAINT INSULATED CONDUCTOR
The following is a synopsis of information received via fax:
A reel of insulated conductor was found non-compliant due to failure of insulation tensile and elongation at break test following air oven aging. Wire from the non-compliant reel was delivered to nine plants.
Affected plants: Wolf Creek, Dresden, LaSalle, Limerick, Peach Bottom, Arkansas Nuclear One, Waterford, Susquehanna, and Davis Besse.
Reporting company point of contact:
RSCC Wire and Cable LLC
dba Marmon Industrial Energy and Infrastructure
20 Bradley Park Road
East Granby, CT 06026
Phillip Sargenski - Quality Assurance Manager
Phone: 860-653-8376
Fax: 860-653-8301
Phillip.sargenski@marmoniei.com
* * * UPDATE ON 08/23/24 AT 1315 EDT FROM PHILLIP SARGENSKI TO JOSUE RAMIREZ * * *
The vendor provided the final report for this event listing corrective actions and the estimated completion dates.
Notified R1DO (Lilliendahl), R3DO (Skokowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 09/04/24 AT 1044 EDT FROM PHILLIP SARGENSKI TO NESTOR MAKRIS * * *
The vendor notified the NRC that they plan to send additional finding data regarding this notification via fax and/or email within the next day or two.
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).
* * * UPDATE ON 09/06/24 AT 1327 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *
The vendor identified an additional non-compliant shipment of insulated conductor.
Affected plant: Calvert Cliffs
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).
* * * UPDATE ON 9/17/24 AT 1641 EDT FROM PHILLIP SARGENSKI TO ROBERT THOMPSON * * *
The vendor identified an additional non-compliant shipment of insulated conductor.
Affected customer: Curtiss-Wright Nuclear Division.
Notified R1DO (Werkheiser), R3DO (Ziolkowski), R4DO (Azua), and Part 21 group (Email).
* * * UPDATE ON 9/26/24 AT 1030 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *
The vendor is continuing to conduct inventory sampling which involves a 14 day aging test. Due to the length of testing, the vendor plans on submitting their final report the week of October 7, 2024.
Notified R1DO (Dimitriadis), R3DO (Havertape), R4DO (Young), and Part 21 group (Email).
* * * UPDATE ON 10/28/24 AT 1121 EDT FROM PHILLIP SARGENSKI TO BRIAN P. SMITH * * *
The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. Additional time is needed to complete this review.
Notified R1DO (Eve), R3DO (Edwards), R4DO (Warnick), and Part 21 group (Email).
* * * UPDATE ON 02/13/25 AT 1125 EDT FROM CAROL GROSSO TO IAN HOWARD * * *
The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. RSCC is reviewing shipments from the past 18 months to ensure it has accounted for all non-conforming products. Additional cables related to this scope have been identified and impacted customers have been notified.
***UPDATE ON 03/28/2025 AT 1039 EDT FROM CAROL GROSSO TO RODNEY CLAGG***
The vendor has identified cable(s) that could be affected and have advised customers of the issue and requested that samples be returned to the vendor facility for further verification testing, which is a process that remains ongoing. This testing will confirm the cable's safety related function. Once the testing is complete, the vendor will notify the NRC with an updated and final Part 21 report.
Notified R1DO (Arner), R3DO (Gilliam), R4DO (Deese), and Part 21 group (Email).
* * * UPDATE ON 05/06/2025 AT 0935 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers and perform their evaluations. The process is still ongoing.
Notified R1DO (Eve), R3DO (Ruiz), R4DO (Dodson), and Part 21 group (Email).
***UPDATE ON 06/03/2025 AT 1605 EDT FROM CAROL GROSSO TO ERNEST WEST***
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers and is performing evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Dimitriadis), R3DO (Orlikowski), R4DO (Dodson), and Part 21 group (Email).
* * * UPDATE ON 07/02/2025 AT 1634 EDT FROM CAROL GROSSO TO TENISHA MEADOWS * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Carfang), R3DO (Havertape), R4DO (Warnick), and Part 21 group (Email).
* * * UPDATE ON 09/09/2025 AT 1637 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Ford), R3DO (Sanchez Santiago), R4DO (Deese), and Part 21 group (Email).
* * * UPDATE ON 10/01/2025 AT 1815 EDT FROM CAROL GROSSO TO JORDAN WINGATE* * *
The vendor provided an update on their ongoing evaluation. The vendor continues to work with customers requesting product be returned for evaluation testing. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Warnek), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 11/13/2025 AT 1228 EST FROM CAROL GROSSO TO ROBERT THOMPSON * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Lilliendahl), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 12/04/2025 AT 1602 EST FROM CAROL GROSSO TO KERBY SCALES * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Schussler), R3DO (Hills), R4DO (Deese), and Part 21 group via email.
EN Revision Text: PART 21 REPORT - NON-COMPLAINT INSULATED CONDUCTOR
The following is a synopsis of information received via fax:
A reel of insulated conductor was found non-compliant due to failure of insulation tensile and elongation at break test following air oven aging. Wire from the non-compliant reel was delivered to nine plants.
Affected plants: Wolf Creek, Dresden, LaSalle, Limerick, Peach Bottom, Arkansas Nuclear One, Waterford, Susquehanna, and Davis Besse.
Reporting company point of contact:
RSCC Wire and Cable LLC
dba Marmon Industrial Energy and Infrastructure
20 Bradley Park Road
East Granby, CT 06026
Phillip Sargenski - Quality Assurance Manager
Phone: 860-653-8376
Fax: 860-653-8301
Phillip.sargenski@marmoniei.com
* * * UPDATE ON 08/23/24 AT 1315 EDT FROM PHILLIP SARGENSKI TO JOSUE RAMIREZ * * *
The vendor provided the final report for this event listing corrective actions and the estimated completion dates.
Notified R1DO (Lilliendahl), R3DO (Skokowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 09/04/24 AT 1044 EDT FROM PHILLIP SARGENSKI TO NESTOR MAKRIS * * *
The vendor notified the NRC that they plan to send additional finding data regarding this notification via fax and/or email within the next day or two.
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).
* * * UPDATE ON 09/06/24 AT 1327 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *
The vendor identified an additional non-compliant shipment of insulated conductor.
Affected plant: Calvert Cliffs
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).
* * * UPDATE ON 9/17/24 AT 1641 EDT FROM PHILLIP SARGENSKI TO ROBERT THOMPSON * * *
The vendor identified an additional non-compliant shipment of insulated conductor.
Affected customer: Curtiss-Wright Nuclear Division.
Notified R1DO (Werkheiser), R3DO (Ziolkowski), R4DO (Azua), and Part 21 group (Email).
* * * UPDATE ON 9/26/24 AT 1030 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *
The vendor is continuing to conduct inventory sampling which involves a 14 day aging test. Due to the length of testing, the vendor plans on submitting their final report the week of October 7, 2024.
Notified R1DO (Dimitriadis), R3DO (Havertape), R4DO (Young), and Part 21 group (Email).
* * * UPDATE ON 10/28/24 AT 1121 EDT FROM PHILLIP SARGENSKI TO BRIAN P. SMITH * * *
The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. Additional time is needed to complete this review.
Notified R1DO (Eve), R3DO (Edwards), R4DO (Warnick), and Part 21 group (Email).
* * * UPDATE ON 02/13/25 AT 1125 EDT FROM CAROL GROSSO TO IAN HOWARD * * *
The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. RSCC is reviewing shipments from the past 18 months to ensure it has accounted for all non-conforming products. Additional cables related to this scope have been identified and impacted customers have been notified.
***UPDATE ON 03/28/2025 AT 1039 EDT FROM CAROL GROSSO TO RODNEY CLAGG***
The vendor has identified cable(s) that could be affected and have advised customers of the issue and requested that samples be returned to the vendor facility for further verification testing, which is a process that remains ongoing. This testing will confirm the cable's safety related function. Once the testing is complete, the vendor will notify the NRC with an updated and final Part 21 report.
Notified R1DO (Arner), R3DO (Gilliam), R4DO (Deese), and Part 21 group (Email).
* * * UPDATE ON 05/06/2025 AT 0935 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers and perform their evaluations. The process is still ongoing.
Notified R1DO (Eve), R3DO (Ruiz), R4DO (Dodson), and Part 21 group (Email).
***UPDATE ON 06/03/2025 AT 1605 EDT FROM CAROL GROSSO TO ERNEST WEST***
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers and is performing evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Dimitriadis), R3DO (Orlikowski), R4DO (Dodson), and Part 21 group (Email).
* * * UPDATE ON 07/02/2025 AT 1634 EDT FROM CAROL GROSSO TO TENISHA MEADOWS * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Carfang), R3DO (Havertape), R4DO (Warnick), and Part 21 group (Email).
* * * UPDATE ON 09/09/2025 AT 1637 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Ford), R3DO (Sanchez Santiago), R4DO (Deese), and Part 21 group (Email).
* * * UPDATE ON 10/01/2025 AT 1815 EDT FROM CAROL GROSSO TO JORDAN WINGATE* * *
The vendor provided an update on their ongoing evaluation. The vendor continues to work with customers requesting product be returned for evaluation testing. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Warnek), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 11/13/2025 AT 1228 EST FROM CAROL GROSSO TO ROBERT THOMPSON * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Lilliendahl), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).
* * * UPDATE ON 12/04/2025 AT 1602 EST FROM CAROL GROSSO TO KERBY SCALES * * *
The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.
Notified R1DO (Schussler), R3DO (Hills), R4DO (Deese), and Part 21 group via email.
Power Reactor
Event Number: 58069
Facility: Summer
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-AP1000,[3] W-AP1000
NRC Notified By: Justin Bouknight
HQ OPS Officer: Karen Cotton
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-AP1000,[3] W-AP1000
NRC Notified By: Justin Bouknight
HQ OPS Officer: Karen Cotton
Notification Date: 12/03/2025
Notification Time: 12:26 [ET]
Event Date: 10/03/2025
Event Time: 09:48 [EST]
Last Update Date: 12/03/2025
Notification Time: 12:26 [ET]
Event Date: 10/03/2025
Event Time: 09:48 [EST]
Last Update Date: 12/03/2025
Emergency Class: Non Emergency
10 CFR Section:
50.73(a)(1) - Invalid Specif System Actuation
10 CFR Section:
50.73(a)(1) - Invalid Specif System Actuation
Person (Organization):
Worosilo, Jannette (R2DO)
Worosilo, Jannette (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 0 | Hot Standby | 100 | Power Operation |
60-DAY REPORT OF INVALID EMERGENCY FEEDWATER SYSTEM ACTUATION
The following information was provided by the licensee via phone and email:
"As allowed by 10 CFR 50.73(a)(1), VC Summer Nuclear Station (VCSNS) is making a 60-day notification of an invalid actuation under 10 CFR 50.73(a)(2)(iv)(A).
"At 0948 EDT, on October 3, 2025, VCSNS commenced a shutdown to repair a steam line leak. On October 4 at 2116 EDT, VCSNS was in mode 3, with the 'A' motor-driven emergency feedwater (EFW) pump providing decay heat removal. Main feedwater (MFW) had been secured per standard operating procedures. The deaerator storage tank (DAST) experienced a level decrease due to secondary-side valve leak-by. When the DAST level reached low-low level, an automatic signal was generated to secure the already secured MFW Pumps, which automatically sent an actuation signal to EFW. The low-low DAST signal is intended to secure MFW pumps to prevent damage due to a potential loss of net positive suction head at lower DAST levels. This sequence resulted in the invalid actuation of the previously secured 'B' EFW pump.
"This actuation was not in response to an actual engineered safety feature (ESF) condition and does not meet the criteria for a valid ESF actuation. This event is being reported as a 60-day report in accordance with 10 CFR 50.73(a)(1) for an invalid actuation of the EFW System.
"The NRC Senior Resident Inspector has been notified."
The following information was provided by the licensee via phone and email:
"As allowed by 10 CFR 50.73(a)(1), VC Summer Nuclear Station (VCSNS) is making a 60-day notification of an invalid actuation under 10 CFR 50.73(a)(2)(iv)(A).
"At 0948 EDT, on October 3, 2025, VCSNS commenced a shutdown to repair a steam line leak. On October 4 at 2116 EDT, VCSNS was in mode 3, with the 'A' motor-driven emergency feedwater (EFW) pump providing decay heat removal. Main feedwater (MFW) had been secured per standard operating procedures. The deaerator storage tank (DAST) experienced a level decrease due to secondary-side valve leak-by. When the DAST level reached low-low level, an automatic signal was generated to secure the already secured MFW Pumps, which automatically sent an actuation signal to EFW. The low-low DAST signal is intended to secure MFW pumps to prevent damage due to a potential loss of net positive suction head at lower DAST levels. This sequence resulted in the invalid actuation of the previously secured 'B' EFW pump.
"This actuation was not in response to an actual engineered safety feature (ESF) condition and does not meet the criteria for a valid ESF actuation. This event is being reported as a 60-day report in accordance with 10 CFR 50.73(a)(1) for an invalid actuation of the EFW System.
"The NRC Senior Resident Inspector has been notified."