Event Notification Report for May 22, 2026

AGREEMENT STATE REPORT - STUCK RADIOGRAPHY SOURCE

The following is a summary of information provided by the Kansas Department of Health and Environment (KDHE) via email:

On April 1, 2026, KDHE was notified of a source retrieval incident which occurred on March 31, 2026, involving Innovative Plant Consulting at the Babcock and Wilcox Chanute facility. A 55.4 Ci Ir-192 source from a QSA Global 880D radiography camera became non-retrievable after a wind-driven welding screen struck and displaced the magnetic stand supporting the guide tube assembly. The radiography crew and radiation safety officer (RSO) established boundaries, and the RSO performed a manual source retrieval using shielding and hand tools, successfully returning the source to the fully shielded position. Reported doses were 158 mR to the RSO, 50 mR to the radiographer, and 8 mR to the assistant radiographer.

KDHE's investigation determined that the event met the reporting criteria of 10 CFR 34.101(a)(2), requiring a 24-hour notification, but Kansas initially submitted only a 30-day report based on the licensee's interpretation. The inspector verified the event timeline, ensured the damaged guide tube was removed from service, and identified a violation because the RSO who performed the retrieval was not certified as required by the license.

AGREEMENT STATE REPORT - LOST LOCALIZATION SEED

The following is a summary of information provided by the New York City Office of Radiological Health via email:

The licensee reported that three I-125 seeds were implanted in a patient on March 11, 2026, and explanted on March 12, 2026. On March 17, 2026, during an inventory check, one of the seeds could not be located. They believe the seed was inadvertently discarded with the specimen in the bio waste. The seed activity was estimated as 98 microcuries on the date of use and 89 microcuries on the date it was discovered missing.

New York Incident Number: NY260002

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 - LEAKING SOURCE

The following information was received from the Massachusetts Radiation Control Program (the Agency) via email:

"On May 14, 2026, Boston Medical Center notified the Agency that on September 30, 2025, a Cs-137 sealed source was found to be leaking.

"The source is a Cs-137 sealed source, manufactured by Eckert & Ziegler, serial number 1356-1-5. The source has an activity of 165 microcuries. The analysis indicated a contamination level of 0.00617 microcuries, which exceeds the regulatory limit. Upon discovery, the source was immediately isolated and secured to prevent contamination. The radiation safety team initiated confirmatory surveys of the source, device, surrounding area, and involved personnel. No personnel or equipment was found to be contaminated. The source is currently located in the waste room awaiting eventual disposal through a waste broker.

"The reporting requirement is immediate per 105 Code of Massachusetts Regulation 120.288, `reports of leaking or contaminated sources.'

"The Agency considers this event to be open."

AGREEMENT STATE REPORT - EQUIPMENT FAILURE

The following information was provided by the Illinois Emergency Management Agency and Office of Homeland Security (the Agency) via email:

"The Agency was contacted on May 15, 2026, by the corporate radiation safety officer at Isomedix Operations, Inc. (IL-01123-02) in Libertyville, IL, to advise of a reportable equipment failure. According to the report, the L375 radiation monitor used to perform required radioactivity measurements of the pool water (e.g., leak testing of the pool irradiator sources) on a pool irradiator failed at some point during the last month. The failure was discovered today, May 15, 2026, during a routine monthly test of the radiation monitor. The monitor was reported as operational at the time of last check conducted in April 2026.

"Replacement monitoring equipment was on hand and was installed today and the radiation monitor was tested and is operational. The pool water was confirmed to be free of radioactivity. This incident had no impact to public or worker safety; nor is there any indication of leaking sources.

"The licensee met the 24-hour reporting requirement. The licensee advised that they would send an event report to the Agency within 30 days as required to include a proposed corrective action.

"Note, a similar incident was reported last year on July 17, 2025, and the licensee advised that this event appeared identical in nature to the one reported at that time. In both events, the L375 monitor appeared to fail at the 11-12 year mark of service. The licensee is contemplating a change in procedures to require replacement of all L375 monitors at 10-year intervals."

Illinois Item Number: IL260012

FITNESS FOR DUTY

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

"At 0800 EDT on May 21, 2026, it was determined that a contract supervisor failed a test specified by the fitness for duty testing program. The individual's authorization for site access has been terminated.

"The NRC Resident Inspector has been notified."