Event Notification Report for December 24, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/23/2024 - 12/24/2024
EVENT NUMBERS
57481
57481
Agreement State
Event Number: 57481
Rep Org: SC Dept of Health & Env Control
Licensee: Mitsubishi Chemical America, Inc.
Region: 1
City: Greer State: SC
County:
License #: 036
Agreement: Y
Docket:
NRC Notified By: Andrew Roxburgh
HQ OPS Officer: Sam Colvard
Licensee: Mitsubishi Chemical America, Inc.
Region: 1
City: Greer State: SC
County:
License #: 036
Agreement: Y
Docket:
NRC Notified By: Andrew Roxburgh
HQ OPS Officer: Sam Colvard
Notification Date: 12/26/2024
Notification Time: 10:21 [ET]
Event Date: 12/24/2024
Event Time: 21:00 [EST]
Last Update Date: 03/06/2025
Notification Time: 10:21 [ET]
Event Date: 12/24/2024
Event Time: 21:00 [EST]
Last Update Date: 03/06/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Elkhiamy, Sarah (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Elkhiamy, Sarah (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
EN Revision Imported Date: 3/7/2025
EN Revision Text: AGREEMENT STATE REPORT - DAMAGED SAFETY INSTRUMENT
The following information was provided by the South Carolina Department of Environmental Control (the Department) via email:
"At approximately 2100 EST, on December 24, 2024, the licensee's staff noticed a tear in the Mylar window on one of their Thermo-Fisher FC-185 beta gauges, thus causing the system to be shut down. The system was put back into service at approximately 0000 on December 25, 2024. The licensee's radiation safety officer contacted the Department to report the incident at 1502 on December 25, 2024. The Thermo-Fisher Model TFC-185 contains 1250 mCi of Kr-85. The source model number is a Kr85-4, and the serial number is KA-2197. There were no radiation exposures resulting from the service of the gauge."
* * * UPDATE ON 03/06/2025 AT 0840 FROM ANDREW ROXBURGH TO BILLY NYTKO * * *
"The licensee submitted its 30-day written report on January 16, 2025. The report indicated that the Mylar window was replaced at 2350 on December 24, 2025. The report also indicated that there were no increased radiation exposures to individuals during the repair. The Department considers this event closed."
Notified R1DO(Ford) and NMSS Events (email)
EN Revision Text: AGREEMENT STATE REPORT - DAMAGED SAFETY INSTRUMENT
The following information was provided by the South Carolina Department of Environmental Control (the Department) via email:
"At approximately 2100 EST, on December 24, 2024, the licensee's staff noticed a tear in the Mylar window on one of their Thermo-Fisher FC-185 beta gauges, thus causing the system to be shut down. The system was put back into service at approximately 0000 on December 25, 2024. The licensee's radiation safety officer contacted the Department to report the incident at 1502 on December 25, 2024. The Thermo-Fisher Model TFC-185 contains 1250 mCi of Kr-85. The source model number is a Kr85-4, and the serial number is KA-2197. There were no radiation exposures resulting from the service of the gauge."
* * * UPDATE ON 03/06/2025 AT 0840 FROM ANDREW ROXBURGH TO BILLY NYTKO * * *
"The licensee submitted its 30-day written report on January 16, 2025. The report indicated that the Mylar window was replaced at 2350 on December 24, 2025. The report also indicated that there were no increased radiation exposures to individuals during the repair. The Department considers this event closed."
Notified R1DO(Ford) and NMSS Events (email)