Event Notification Report for June 23, 2026

EN Revision Imported Date: 6/23/2026

EN Revision Text: 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

* * * UPDATE ON 06/22/2026 AT 1128 EDT FROM DAVID SAUDER TO ROBERT THOMPSON * * *

The following is a summary of information provided by NucFil, LLC via fax:

The root cause investigation continues. Completion of the root cause is awaiting testing of additional material to confirm process changes have been effective in eliminating the issue.

Notified R2DO (Bacon), NMSS Events Notification (email), Part 21 Materials (email).

AGREEMENT STATE REPORT - LEAKING SEALED SOURCE

The following information was provided by the Georgia Radioactive Material Program via email:

"During a routine leak test performed on June 12, 2026, by West Physics at Heart and Vascular Care, Inc., a Cs-137 Eckert and Ziegler E-vial sealed source (original activity 206.4 microcuries, serial number: 1377-19-19) was found to contain removable contamination above the acceptable limit, indicating a potential leak. Leak test results of 0.005 microcuries or below are acceptable; the sample from this vial measured 0.0127 microcuries. A visual inspection identified cracks in the vial, although it is not known whether these cracks were the direct cause of the contamination. No other damage was observed. The radiation safety officer (RSO) was notified immediately.

"Removable contamination surveys were conducted in all areas where the source had been stored or used, and the physicist's hands were also surveyed. All samples were analyzed using the well counter, and no removable contamination was detected. The damaged vial was placed back into the lead pig, which was then sealed with tape and placed inside a plastic bag along with the gloves used and all contamination samples. This bag was then placed inside a second plastic bag, sealed with tape, and stored in the hot lab.

"The licensee is contacting waste disposal companies to arrange disposal of the source and associated waste. An update will be provided once disposal is complete."

GA Incident number: 124

AGREEMENT STATE REPORT - STOLEN GAUGE

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

On 6/13/2026, a technician's car was stolen from their driveway with a Troxler gauge stored securely in the trunk. The radiation safety officer (RSO) was notified by the technician around 1010 EDT. Local law enforcement and the FBI were notified. The RSO called NJDEP and at 1410, the RSO emailed NJDEP Bureau of Environmental Radiation (BER) staff.

Gauge Information
Model: Troxler 3440
Serial Number: 29038
Activity: 44 mCi of Am-241/Be 44 mCi; 9 mCi of Cs-137


* * * UPDATE ON 06/16/2026 AT 1617 EDT FROM CHRISTOPHER GIAQUINTO TO JOSUE RAMIREZ * * *

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

"The gauge was recovered today with no damage."

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


NJ Report ID: 986950

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

FITNESS FOR DUTY

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

"At 1009 EDT on 6/22/2026, it was determined that a supervisor failed a test specified by the FFD testing program. The individual's authorization for site access has been terminated.

"The NRC Resident Inspector has been notified."