Event Notification Report for May 26, 2026

EN Revision Imported Date: 5/26/2026

EN Revision Text: AGREEMENT STATE REPORT - LEAKING SOURCE

The following information was provided by the Alabama Office of Radiation Control via email:

"On April 10, 2026, the radiation safety officer (RSO) provided a written notification for a leaking source to the [Alabama Office of Radiation Control] License and Registration Branch supervisor. Specifically, [the source is] an Eckert & Ziegler, Isotope Products sealed source, source number 1145-50-12, with a reference date of March 1, 2006, and a reference activity of 197 microcuries [of Cs-137]. The licensee's representative indicated in the notification that, while the initial wipe test was close to exceeding the limits, subsequent wipe tests exceeded them. The licensee's representative further stated that a visible crack was present in the e-vial's plastic. The licensee's representative removed the e-vial from use, placed it into a sealed plastic bag, placed the sealed plastic bag into a labeled lead pig, and placed the lead pig in a locked storage room in the radiation safety office."

Alabama Incident Number: 26-05

* * * UPDATE ON 05/22/2026 AT 1125 EDT FROM SEAN WILLIAMS TO KERBY SCALES * * *

The following update is a summary of information provided by the Alabama Office of Radiation Control via email:

"The licensee provided close-out documentation for the incident that the source has been disposed of through a waste broker."

Notified R1DO (Anagnostopoulos) and NMSS Events Notification via email.

EN Revision Imported Date: 5/26/2026

EN Revision Text: AGREEMENT STATE REPORT - LOST SOURCES

The following is a summary of information provided by the Alabama Office of Radiation Control (the Agency) via phone and email:

On April 30, 2026, the Agency attempted to conduct a site visit for Pope Testing Services, LLC at its licensed storage address in Mobile, Alabama. The current building owner reported that the licensee vacated the storage space for roughly a year and removed all equipment at that time. No licensed material or company property remains at the location. All recent attempts to contact the licensee have been unsuccessful. The last confirmed interaction with the licensee was on December 23, 2024.
At the last inspection, the licensee possessed two portable moisture/density gauges, but their current location is unknown.

The Agency is currently partnering with the Alabama Department of Public Health General Counsel on next steps, which may include the impoundment of radioactive material and the revocation of the license.

Lost Source Information:
(1) Manufacturer: Troxler
Model No.: 3440
Serial No.: 70923
RAM: 8 mCi of Cs-137, 40 mCi of Am-241/Be

(2) Manufacturer: CPN
Model No.: MC-3
Serial No.: M320506596
RAM: 10 mCi of Cs-137, 50 mCi of Am-241/Be

Alabama Incident Number: 26-09

* * * UPDATE ON 05/22/2026 AT 1125 EDT FROM SEAN WILLIAMS TO KERBY SCALES * * *

The following update is a summary of information provided by the Alabama Office of Radiation Control via email:

The Agency located the gauges and spoke with licensee's radiation safety officer/owner. The licensee agreed to voluntarily surrender the gauges to the Agency. The Agency took possession of the gauges on May 21, 2026, and is in the process of administratively terminating the license.

Notified R1DO (Anagnostopoulos), NMSS Events Notification, and ILTAB via email.

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."

AGREEMENT STATE REPORT - POTENTIAL OVEREXPOSURE

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

"On May 16, 2026, a possible overexposure occurred when one of the licensee's radiographer/trainers was using a Co-60 source to evaluate a weld on a 3-3/8-inch-thick can for a vessel. The radiographer made an exposure, retrieved the film/detector, processed it, showed it to their partner, then approached to reposition the detector and source. When going to crank out the source again, they realized the source had been out the entire time. Notifications were made, dosimeters were sent for immediate processing and dose calculations were made. The preliminary doses were reported on May 18, 2026 as 24.5 R Deep; 26.1 R Shallow, and 23.7 R Lens.

"Awaiting written report due in 30 days. Although not required, this report is made at the 4-hour window from when the doses were provided taking a conservative approach to the reporting process."

Texas Incident Number: I-10293
NMED Report Number: TX260015

AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE

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

"On May 18, 2026, the Department was notified by the licensee's radiation safety officer (RSO) that a Troxler 3430 moisture/density gauge containing a 40 millicurie americium-241/beryllium source and a 10 millicurie cesium-137 source had been damaged at a work site. The RSO reported the gauge had fallen off the back of a pickup truck and the case was damaged. The RSO provided a picture which shows half of the upper yellow plastic case broken and separated the bottom of the case. The cesium source operating rod was intact in the gauge and fully retracted to the shielded position. The RSO responded to the scene and inspected the gauge. Dose rates taken at the gauge were normal. The gauge is being returned to its normal storage location. The RSO stated a leak test of the gauge would be completed. No overexposures occurred due to this event. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident Number: I-10294
NMED Report Number: TX260016

AGREEMENT STATE REPORT - STUCK SHUTTER

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

"On May 18, 2026, the licensee reported that during routine testing, the bolts securing the shutter operating handle on a Vega SHF-2B had broken and would not operate the shutter. The gauge contains a 1,000 millicurie (original activity) cesium-137 source. The shutter was determined to be open based on radiation surveys. The licensee stated they were contacting a service company to repair the gauge. The licensee reported the gauge does not present an exposure hazard to any individual. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident Number: I-10295
NMED Report Number: TX260017

AGREEMENT STATE REPORT - MEDICAL EVENT

The following information was provided by the New Jersey Department of Environmental Protection (NJDEP) via email:

"The licensee reported that during a treatment with an Elekta Leksell Gamma Knife Icon unit [on 5/18/2026], the unit halted treatment due to a collision error twice during the treatment. The licensee was able to clear the error the first time and continue with the treatment but were unable to do so the second time. This caused one of the treatment areas to only receive 7.9 Gy, compared to a planned dose of 21 Gy.

"After the licensee investigated, they believed the patient's blanket was bumping into the collimator cap, causing the collision errors. They have since tested the unit and, since it passed all testing, placed it back in service."

State Event Report ID number: TBD

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

PART 21 - DEFECT OF SUBSAMPLE TUBES

The following is a summary of information provided by NucFil, LLC via phone and email:

NucFil, LLC, doing business as Nuclear Filter Technology (NFT), provided initial notification, per 10 CFR 21.21(d)(3)(i), of a defect found in P-10 PCTFE (polychlorotrifluoroethylene) subsample tubes. Inspection of inventory revealed a surface roughness average (Ra) between 40-70 Ra in isolated areas, exceeding the ASTM C1689-21 maximum specification of 32 Ra. Failure analysis confirmed vertical striations causing out-of-specification roughness. Despite this, structural integrity and helium leak tests met all required standards, and independent testing verified material compliance with ASTM D1430 Group 01, Class 1, Grade 3. Purchasers, Los Alamos National Lab and Global Laser Enrichment, have been contacted to check for non-conformance in delivered tubes and assess any related safety concerns. The deviation has been recorded in NFT's corrective action program (26-0008), and further evaluation with purchasers is ongoing as part of quality assurance efforts.

NFT Contact:
David Sauder, Director Quality Assurance
NUCFIL, LLC (doing business as NFT)
400 Corporate Circle, Suite M
Golden, CO 80401
PHONE: 303-384-9785
FAX: 303-384-9579