Event Notification Report for September 17, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/16/2025 - 09/17/2025
Agreement State
Event Number: 57936
Rep Org: Texas Dept of State Health Services
Licensee: Covestro LLC
Region: 4
City: Baytown State: TX
County:
License #: L01577
Agreement: Y
Docket:
NRC Notified By: Art Tucker
HQ OPS Officer: Karen Cotton
Licensee: Covestro LLC
Region: 4
City: Baytown State: TX
County:
License #: L01577
Agreement: Y
Docket:
NRC Notified By: Art Tucker
HQ OPS Officer: Karen Cotton
Notification Date: 09/17/2025
Notification Time: 21:25 [ET]
Event Date: 09/17/2025
Event Time: 00:00 [CDT]
Last Update Date: 09/17/2025
Notification Time: 21:25 [ET]
Event Date: 09/17/2025
Event Time: 00:00 [CDT]
Last Update Date: 09/17/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Agrawal, Ami (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Agrawal, Ami (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - DAMAGED GAUGE
The following information was provided by the Texas Department of State Health Services (the Department) via email:
"On September 17, 2025, the Department received a report from the licensee stating that, during routine testing, the screw for the shutter operating arm on a Ronan SA-1-F37 nuclear gauge containing a 100 millicurie (original activity) cesium-137 source had broken. The shutter is stuck in the open position. Open is the normal operating position. The licensee stated they will contact a service provider to repair the gauge.
"The licensee reported that there is no risk of additional radiation exposure to members of the general public or radiation workers, due to this on/off mechanism failure. The licensee reported a service provider has been contacted to repair the gauge.
"Additional information will be provided as it is received in accordance with SA-300."
Texas Incident Number: 10230
Texas NMED Number: TX250049
The following information was provided by the Texas Department of State Health Services (the Department) via email:
"On September 17, 2025, the Department received a report from the licensee stating that, during routine testing, the screw for the shutter operating arm on a Ronan SA-1-F37 nuclear gauge containing a 100 millicurie (original activity) cesium-137 source had broken. The shutter is stuck in the open position. Open is the normal operating position. The licensee stated they will contact a service provider to repair the gauge.
"The licensee reported that there is no risk of additional radiation exposure to members of the general public or radiation workers, due to this on/off mechanism failure. The licensee reported a service provider has been contacted to repair the gauge.
"Additional information will be provided as it is received in accordance with SA-300."
Texas Incident Number: 10230
Texas NMED Number: TX250049
Agreement State
Event Number: 57937
Rep Org: Illinois Emergency Mgmt. Agency
Licensee: Perkin Elmer Corporation
Region: 3
City: Downers Grove State: IL
County:
License #: 9223624
Agreement: Y
Docket:
NRC Notified By: Kim Stice
HQ OPS Officer: Adam Koziol
Licensee: Perkin Elmer Corporation
Region: 3
City: Downers Grove State: IL
County:
License #: 9223624
Agreement: Y
Docket:
NRC Notified By: Kim Stice
HQ OPS Officer: Adam Koziol
Notification Date: 09/18/2025
Notification Time: 10:19 [ET]
Event Date: 09/17/2025
Event Time: 00:00 [CDT]
Last Update Date: 09/18/2025
Notification Time: 10:19 [ET]
Event Date: 09/17/2025
Event Time: 00:00 [CDT]
Last Update Date: 09/18/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Szwarc, Dariusz (R3DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Szwarc, Dariusz (R3DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - LOST GAS CHROMATOGRAPHY DEVICES
The following information was provided by the Illinois Emergency Management Agency (the Agency) via email:
"As a result of an ongoing investigation into unresponsive general licensees, the Agency became aware that five (5) generally licensed Perkin-Elmer model n610-0063 gas chromatography devices, each containing 15 millicuries of Ni-63, are missing.
"Reportedly, in late 2024, the licensee went through a transition of layoffs and is currently being bought by another company. Due to the change in employees, the location of these devices is unknown.
"The licensee failed to properly transfer or dispose of the devices (serial numbers 4377, 6055, 6273, 6202, and 7067). The facility manager is currently trying to reach out to past employees for information. The Agency has reached out to the distributor to try and locate the devices.
"The quantity of radioactive material involved, while unlikely to be dangerous to the public, is reportable within 30 days to the Agency and the U.S. NRC. Investigation is ongoing, and any updates will be reported."
Illinois Event Number: IL250040
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
The following information was provided by the Illinois Emergency Management Agency (the Agency) via email:
"As a result of an ongoing investigation into unresponsive general licensees, the Agency became aware that five (5) generally licensed Perkin-Elmer model n610-0063 gas chromatography devices, each containing 15 millicuries of Ni-63, are missing.
"Reportedly, in late 2024, the licensee went through a transition of layoffs and is currently being bought by another company. Due to the change in employees, the location of these devices is unknown.
"The licensee failed to properly transfer or dispose of the devices (serial numbers 4377, 6055, 6273, 6202, and 7067). The facility manager is currently trying to reach out to past employees for information. The Agency has reached out to the distributor to try and locate the devices.
"The quantity of radioactive material involved, while unlikely to be dangerous to the public, is reportable within 30 days to the Agency and the U.S. NRC. Investigation is ongoing, and any updates will be reported."
Illinois Event Number: IL250040
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf