Current Event Notification Report for August 14, 2025

AGREEMENT STATE REPORT - LOST / MISSING SOURCES

The following information was provided by the Illinois Emergency Management Agency (the Agency) via email:

"As a result of an ongoing Agency investigation into unresponsive general licensees, the Agency became aware today that two generally licensed fixed gauges, one containing 150 millicuries of Am-241 and the other 80 millicuries of Am-241, were likely disposed of as scrap in February 2023. The quantity of radioactive material involved, while unlikely to be dangerous to the public, is immediately reportable to the Agency and NRC. Agency staff will conduct a reactive inspection to determine if any additional information on the gauges is available (e.g., [are the items] still at the scrap yard or potentially auctioned during site closure).

"The licensee was operating at Glenview, IL, up until 2022. At that time, the company was in possession of an NDC Technologies model 102X (s/n 591181) containing 80 mCi of Am-241, and an NDC Technologies model 103X (s/n 591171) containing 150 mCi of Am-241. According to the facility's property manager, the facility closed in August 2022. Reportedly, the contents of the building were auctioned off and all remaining items were recycled for scrap in February 2023. The property manager stated that at the time they did not realize there was radioactive material in the scrap. This investigation remains ongoing."

Illinois Item Number: IL250032

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

AGREEMENT STATE REPORT - STUCK SHUTTER

The following is a summary of information provided by the Louisiana Department of Environmental Quality (LDEQ) via email:

The licencee's radiation safety officer notified LDEQ of an equipment malfunction, which occurred at their facility on August 6, 2025, at approximately 0930 CDT. During a routine shutter check, the shutter of a fixed gauge became stuck in the closed position. The vendor conducted a site visit and assessment where he noted that the bolt fastening the rotor handle sheared, leaving the rotor inoperable. The shutter was left in the open position while awaiting replacement. The licensee intends to order a replacement source holder and shield, remove the existing source holder, and prepare it for disposal. The gauge shutter is now stuck in the open position. No exposures in excess of regulatory limits took place. The licensee is monitoring radiation levels around the gauge and vessel and will notify the LDEQ of incident status changes.

Device Information:
Manufacturer: VEGA
Source housing model: SH-F1A-45
Device serial number: 74127
Source serial number: 7474CO
Activity: 300 mCi
Isotope: Cs-137

Louisiana Event Report Number: LA20250005

AGREEMENT STATE REPORT - BROKEN GAUGE SHUTTER

The following is a summary of the information provided by the Louisianna Department of Environmental Quality (LDEQ) via email:

On August 06, 2025, at 2248 CDT, LDEQ was notified by Union Carbide Corporation's radiation safety officer via phone concerning a broken handle for the shutter rotor on a fixed nuclear gauge. This condition was identified during a six-month inspection by BBP Sales (a third-party inspector) in their Poly Ethylene Plant Unit - LP-6 Rx3 West Product Chamber. The fixed gauge is used for level/density and is in the "On" position. This is its normal position and poses no additional risk to the public or plant personnel.

BBP Sales is planning to replace the rotor with a new rotor and handle next week.

Ohmart SH-F2-0 nuclear gauge
Serial number: 20285009
Source serial number: 156OCO
Isotope: Cs-137
Activity: 500 mCi

LA Event Report ID Number: LA 20250006

TECHNICAL SPECIFICATION REQUIRED SHUTDOWN

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

"At 1621 EDT on 8/12/2025, a technical specification required shutdown was initiated at Davis-Besse Nuclear Power Station Unit 1. Technical specification limiting condition for operation 3.3.11 for steam generator (SG) low level instrumentation channel requirements was not met, and condition 'B' was entered on 8/12/2025 at 1600 with required actions to be in mode 3 with a completion time of 6 hours and be in mode 4 with a completion time of 12 hours. This event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(i). There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

The affected SG level instrumentation is for emergency feedwater automatic initiation. The instruments were declared inoperable due to a reference leg leak in containment.