Event Notification Report for June 03, 2025

AGREEMENT STATE REPORT - FOUND SOURCE

The following information was received from the Colorado Department of Public Health and Environment (CDPHE) via email:

"On June 3, 2025, at approximately 1450 MDT, Western Metals Recycling, a non-licensee, reported a radiation alarm to the CDPHE. The alarm occurred on a truck loaded with scrap steel. Western Metals facility staff performed surveys using a handheld instrument and observed a net radiation reading of approximately 15 microrem/hour in the area of the load behind the cab of the truck. CDPHE issued a DOT special permit to allow return of the shipment to the non-licensee Denver Scrap Metal Recycle Center. Denver Scrap Metal does not have a vehicle radiation monitoring system.

"CDPHE on-call staff responded to the Denver Scrap Metal facility at approximately 1645 on June 3, 2025. CDPHE staff performed radiation surveys of the truck driver, and no readings above background were noted. CDPHE staff performed radiation surveys of the accessible areas of the load, which had been unloaded onto the ground, focusing on the front of the truck. Radiation surveys eventually located and identified two radium-226 radio luminescent military personnel markers (each approximately 1.5 inches in diameter) as confirmed using a Flir Identifier survey instrument. Dose rate measurements of approximately 1.7 to 2.5 mrem/hour on contact with the Ra-226 markers were observed. Wipe surveys of the markers did not indicate the presence of gross contamination using the handheld instrument for analysis. The sources (markers) were placed in a small bag and then placed inside a metal container. The metal container was surrounded by lead found on site to provide interim shielding and reduce radiation. Facility staff were requested to label, secure, and isolate the Ra-226 sources in an area away from staff, pending final disposition. The facility has contacted a licensed waste broker/service provider to prepare and dispose of the sources.

"Based on Oak Ridge Associated Universities historical information (https://www.orau.org/health-physics-museum/), each marker may contain up to 7 microcuries of Ra-226.

"These items are considered to be generally licensed in accordance with Colorado Part 3, Section 3.6.8.1(4) / 10 CFR 31.12(a)(4). This event is reported, consistent with Section 8.3 (found source) of NRC Handbook SA-300 and Colorado Part 4, Section 4.51.1/10 CFR 20.2201(a)(ii)."

CO Event Number: CO250016

AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE

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

"The Agency was contacted on 6/3/25 by the radiation safety officer for Hanson Professional Services, Inc. to report that a Troxler 3440 moisture density gauge (8 mCi Cs-137, 40 mCi Am-241/Be) had been damaged on a construction site in Pekin, IL. [The licensee reported that] approximately a half-hour earlier, a truck backed over the gauge damaging the case and electronics. The source rod was not extended when the incident occurred. The licensee did not have a survey meter, but the gauge user had isolated the area and was maintaining direct surveillance of the device.

"Agency staff arrived to assess the gauge approximately 90 minutes later. Both sources were undamaged, and exposure rates were consistent with the sealed source and device registry sheet. The source rod was fully retracted, and the shutter closed. The transport case was not damaged and was used to package and prepare the gauge for return to the licensee's storage vault. Area surveys were taken, and the incident did not result in contamination, loss of radioactive material or exposures in excess of regulatory limits. That evening, the gauge was returned to the licensee's secure storage and will be leak tested prior to being shipped to the manufacturer for repair/disposal.

"Investigation findings indicate the gauge user walked away from the gauge momentarily when returning to their vehicle. A vehicle on the site then backed over the device, crushing the housing, but not damaging either source or its shielding. The root cause of the event is failure of the gauge user to maintain constant surveillance and prevent unauthorized access to licensed material. This report will be kept open pending receipt of the licensee's written report identifying corrective actions."

Illinois item number: IL250023

UNIT 1 HIGH-PRESSURE COOLANT INJECTION INOPERABLE

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

"At 2137 EDT on 06/03/2025, while Unit 1 was at 98 percent power in mode 1, the high-pressure coolant injection (HPCI) turbine stop valve failed to open as required when testing the auxiliary oil pump, resulting in the HPCI system being declared inoperable. The cause of the turbine stop valve failing to open is under investigation. HPCI does not have a redundant system, therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). Reactor core isolation cooling and low-pressure emergency core cooling systems were operable during this time.

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. There was no impact to Unit 2."