Event Notification Report for July 08, 2025

RADIOGRAPHY EQUIPMENT FAILURE

The following information was provided by the licensee via phone:

On June 30, 2025, the licensee was performing radiography at a temporary jobsite at the HF Sinclair Refinery with a SPEC-150 camera using a 1.474 Tbq Ir-192 source. With the source extended, a crankout came into contact with a hot pipe, melting the crankout and damaging the source cable. At 1136 MDT, the radiographers determined the source could not be retracted. The radiographers extended the boundary and established a watch to prevent unauthorized entry.

A technician certified for source retrieval used a source retrieval kit and successfully retracted the source at 1203. The crank cable had to be pulled directly due to the cable damage.

The maximum dose to any of the radiographers was 9 mrem. No members of the public received any exposure due to the event.

AGREEMENT STATE REPORT - EQUIPMENT FAILURE

The following information was provided by the Texas Department of State Health Services (the Department) via email:

"On July 1, 2025, the Department received a notification from the licensee regarding a mechanical failure involving a level/density measurement gauge. The licensee reported that the failure was discovered on June 30, 2025. The affected gauge is a Berthold model LB 300 IRL Type I, containing a 500 millicurie cesium-137 sealed source. According to the licensee, the failure occurred when the cable connected to the source carrier broke, causing the source to become lodged within the thermowell inside the process vessel. The licensee stated that the vessel contains product, which is effectively shielding the source and limiting radiation levels outside the vessel. The licensee added that radiation surveys conducted on the vessel exterior indicated exposure levels of less than 2 milliroentgens per hour (mR/hr). There is no indication of elevated radiation risk to workers or members of the public. The licensee further stated that Berthold is scheduled to retrieve the source and repair the cable on July 2, 2025. Additional information will be provided in accordance with SA 300 Reporting requirements."

Texas Incident Number: 10207
NMED Number: TX250032

RESIDUAL HEAT REMOVAL COMPLEX PUMP ROOM DAMPER FULLY CLOSED

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

"On 7/7/2025 at 1545 EDT, one of the division 2 residual heat removal (RHR) complex pump room dampers was noted to be full-closed instead of at the expected full-open position based on outside air temperatures. An operator walkdown confirmed that the division 2 RHR pump room temperature controller was attempting to open the damper. Per plant procedures, the affected RHR service water (RHRSW), emergency equipment service water (EESW), and emergency diesel generator service water pumps (DGSW) were declared inoperable. Division 2 EESW supports the safety function for all division 2 safety systems, including high pressure coolant injection (HPCI). Therefore, HPCI was also declared inoperable. Since HPCI is a single-train safety system, this meets the criterion for event notification per 10 CFR 50.72(b)(3)(v)(D). The damper will be blocked to the position required based on current and projected outside air temperature, this will return the systems to operable. The cause of the damper failure is unknown and under investigation."

The NRC Resident Inspector has been notified.

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

Multiple technical specification limiting conditions for operation (LCOs) were entered as a result of this event. Fermi Unit 2 expects to be able to exit the LCOs within the required timeframes.