ML25112A140
| ML25112A140 | |
| Person / Time | |
|---|---|
| Issue date: | 04/22/2025 |
| From: | Tanya Smith Office of Nuclear Security and Incident Response |
| To: | |
| References | |
| EN57596 | |
| Download: ML25112A140 (1) | |
Text
Posted by: Todd Smith, Nuclear Regulatory Commission (NRC), United States of America INES EVENT RATING FORM Page 1 of 1 INES Event Rating Form (ERF)
Version 2 Sender's Name:
Todd Smith Sender's Organization:
Nuclear Regulatory Commission (NRC) (United States of America)
Event
Title:
Lost Radiography Device Event Date:
2025-03-06 Location / Facility:
Mentone, Texas / National Inspection Services, LLC Event Country:
United States of America Event Type:
Radiation Source INES Rating:
1 - Anomaly (Final)
Rating Date:
2025-03-19 Impact on people and the environment Release beyond authorized limits?
No Overexposure of a member of the public?
No Overexposure of a worker?
No Impact on the radiological barriers and controls at facilities Contamination spread within the facility?
No Damage to radiological barriers (incl. fuel damage) within the facility?
No Degradation of Defence In-Depth?
Yes Other information Person injured physically or casualty?
No Is there a continuing problem?
No Event Description On March 6, 2025, a radiography crew working approximately 16 km (10 mi) east of Mentone, Texas, reported losing a SPEC 150 exposure device containing a 3.53 TBq (95.4 Ci) iridium-192 source.
Update: On March 13, 2025, a member of the public contacted the licensee stating they had found the exposure device. The device was recovered by and is in the possession of the licensee. The device had remained in a locked shed since being found.
The exposure device was found to be intact and no attempt was made to operate or tamper with the device. Exposure levels were normal and no individual would have received any significant exposure due to this event.
NRC EN57596 Rating Justification A Level 1 is warranted for a lost Category 2 source that was recovered and found with all the safety provisions remaining and no indication that they had been breached. See Section 4.2.2 INES Users Manual 2008 Edition (IAEA-INES-2009) http://www-pub.iaea.org/ MTCD/publications/PDF/INES-2009_web.pdf.
Press Release Attached:
No Technical Document Attached:
No Further Information on Web:
Contact Person:
Todd Smith Affiliation:
Nuclear Regulatory Commission (NRC)
Email:
todd.smith@nrc.gov Telephone:
+13018165100 Organization on Web: