Event Notification Report for March 04, 2026

DEGRADED CONDITION - PRIMARY CONTAINMENT

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

"At 0259 EST, on 03/02/2026, during a refueling outage at zero percent power while performing local leak rate testing on the reactor core isolation cooling (RCIC) isolation valves, which are part of the containment boundary, it was determined that the Unit 1 primary containment leakage rate did not meet 10 CFR 50 Appendix J requirements specified in technical specification 5.5.12. This event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A).

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

AGREEMENT STATE REPORT - STUCK OPEN GAUGE SHUTTERS

The following is a summary of information provided by the Utah Division of Waste Management and Radiation Control (DWMRC) via email:

On February 24, 2026, at approximately 1500 MST, the licensee reported that two fixed gauge shutters were found stuck open during an annual shutter check. The licensee has scheduled a vendor to replace the gauges.

The licensee did not provide DWMRC with any information about the device types or radioisotopes involved at the time of the report. DWMRC is awaiting receipt of this information from the licensee.

Utah event report ID: UT260003

AGREEMENT STATE REPORT - LOST IODINE SEED

The following information was received from the New York State Department of Health, Bureau of Environmental Radiation Protection (the Department) via email:

"On January 29, 2026, the Department was notified of a missing iodine-125 localization seed (48 microcuries) at a medical facility located in New York State.

"The I-125 localization seed was removed from storage for implantation into a patient on October 30, 2025. During the quarterly inventory performed on December 30, 2025, the licensee discovered that the I-125 localization seed was not in the storage facility. Surveys of use areas were performed but the seed was not recovered. The facility believes that the seed (which was pre-loaded into a needle) was discarded in the sharps container and was still within the lead shielding."

NY Event Report ID: NY-26-02
NY Incident Number: 1553

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