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Event Notification Report for January 10, 2025

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
01/08/2025 - 01/10/2025

EVENT NUMBERS
57473 57488
Agreement State
Event Number: 57473
Rep Org: SC Dept of Health & Env Control
Licensee: Isomedix Operations Inc.
Region: 1
City: Spartanburg   State: SC
County:
License #: 267
Agreement: Y
Docket:
NRC Notified By: Adam Gause
HQ OPS Officer: Ian Howard
Notification Date: 12/13/2024
Notification Time: 16:10 [ET]
Event Date: 08/13/2024
Event Time: 00:00 [EST]
Last Update Date: 01/09/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
Jackson, Don (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Event Text
EN Revision Imported Date: 1/10/2025

EN Revision Text: AGREEMENT STATE REPORT - IRRADIATOR EVENT

The following information was provided by the South Carolina Department of Environmental Services (the Department) via phone and email:

During a routine inspection conducted by the Department on December 3, 2024, inspection and maintenance records indicated that a float switch for a panoramic pool irradiator had failed on August 13, 2024. Between December 3, 2024, and December 13, 2024, the licensee evaluated the event for reporting applicability. On December 13, 2024, the licensee reported the event to the Department. The licensee is reporting that the float switch on a Nordion (model JS8900) continuous panoramic pool irradiator (serial number IR97) failed on August 13, 2024, during routine maintenance and inspection checks. The float switch was replaced on August 13, 2024. Specifically, the float did not operate the full length to the hard stop. The licensee is reporting no current health and safety concerns. This event is under investigation by the Department.

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The float switch alarms radiation workers of low water levels which would result in higher radiation levels.

* * * UPDATE ON 01/09/25 AT 0806 EST FROM A GAUSE TO K COTTON * * *

The following information was provided by the South Carolina Department of Environmental Services (the Department) via email:

"The licensee submitted a 30-day written report on December 29, 2024. The details of the 30-day written report were consistent with the initial reports. The licensee reported that the cause of the event to be attributed to the wiring harness securing nut being loose, allowing the wiring harness to move which could have caused the low water wire to move out of the intended position. The licensee reported that the new float switch assemble was sealed with an epoxy at the top to ensure that the wiring harness does not move out of position. The licensee's corrective actions included replacing the pool water float assembly and ensuring that all future pool water float assemblies are sealed with epoxy to ensure that wiring does not move from the tested position.

This event/investigation is considered closed."

Notified RDO1(Dimitriadis); NMSS_EVENTS_NOTIFICATION


Power Reactor
Event Number: 57488
Facility: Beaver Valley
Region: 1     State: PA
Unit: [2] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: Nate Falkenstein
HQ OPS Officer: Josue Ramirez
Notification Date: 01/07/2025
Notification Time: 13:07 [ET]
Event Date: 11/09/2024
Event Time: 08:41 [EST]
Last Update Date: 01/07/2025
Emergency Class: Non Emergency
10 CFR Section:
50.73(a)(1) - Invalid Specif System Actuation
Person (Organization):
Dimitriadis, Anthony (R1DO)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N N 0 Cold Shutdown 0 Cold Shutdown
Event Text
60-DAY OPTIONAL TELEPHONIC NOTIFICATION FOR AN INVALID EMERGENCY DIESEL GENERATOR ACTUATION

The following information was provided by the licensee via phone and email:

"This 60-day telephone notification is being made per the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(l) to describe an invalid specific system actuation.

"At 0841 EST on November 9, 2024, with Unit 2 in mode 5, at 0 percent power, an actuation of the 2-1 emergency diesel generator (EDG) occurred when an invalid start signal was generated during troubleshooting activities associated with the 2AE diesel start relay. The 2-1 EDG automatically started as designed when the start signal was received. The output breaker did not close and the 2AE emergency bus remained energized from offsite power consistent with plant design. This was a complete actuation of an EDG to start and come to rated speed, and all affected systems functioned as expected in response to the actuation. Following the actuation, the 2-1 EDG was shut down in accordance with plant procedures.

"Unit 1 was in mode 1 at 100 percent power and was not affected by this event.

"This event is considered an invalid system actuation reportable under 10 CFR 50.73(a)(2)(iv)(A).

"The actuation was not initiated in response to actual plant conditions or parameters and was not a manual initiation. Therefore, in accordance with 10 CFR 50.73(a)(l), this telephone notification is provided within 60 days after discovery of the event instead of submitting a written licensee event report.

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."