ENS 57894
ENS Event | |
|---|---|
07:00 Aug 31, 2025 | |
| Title | |
| Event Description | The following information was provided by the licensee via email:
On the morning of 8/31/2025, an employee of Terracon Consultants discovered that a portable nuclear gauge (Troxler model 3440) was stolen from their vehicle overnight. The gauge was stored in the bed of a pickup truck that had a canopy cover. The gauge was also chained to the bed of the truck. The vehicle was parked inside of a parking garage with camera surveillance. Unfortunately, the cameras were [decoys] and were not operating. An individual gained access to the gauge by breaking through a canopy window and using a bolt cutter to cut the chain securing the Troxler gauge. The density gauge was the only nuclear material stolen. A toolbox was also taken which contained various non-nuclear equipment. The employee contacted Seattle Police, who at 1401 [PDT], had not arrived on scene to generate a report. The licensee will ensure that a report is generated and work with local law enforcement to recover the gauge. A full report will follow within 30 days. Device Information: Manufacturer: Troxler Model: CDCW556 Serial Number: 14086 Source Information: Manufacturer: AEA Technology/QSA Model: CDCW556 (Cs-137) and AMNV.997 (Am-241:Be) Isotopes and Activity: 9 mCi of Cs-137, 44 mCi of Am-241:Be, 0.066 mCi of Cf-252
The Washington State Department of Health, Office of Radiation Protection provided a 30-day written report regarding the incident (WA-25-010). The gauge has not been located at this time. The licensee has an open case with the Seattle Police Department. In addition, the gauge is being actively looked for by the licensee. Notified R4DO (Vossmar), NMSS Event Notification (email), ILTAB (email), and CNSC (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 |
| Where | |
|---|---|
| Terracon Consultants, Inc Seattle, Washington (NRC Region 4) | |
| License number: | WN-I0507-1 |
| Organization: | Wa Office Of Radiation Protection |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+10.97 h0.457 days <br />0.0653 weeks <br />0.015 months <br />) | |
| Opened: | Dane Blakinger 17:58 Aug 31, 2025 |
| NRC Officer: | Ian Howard |
| Last Updated: | Sep 29, 2025 |
| 57894 - NRC Website | |
Terracon Consultants, Inc with Agreement State | |
WEEKMONTHYEARENS 578942025-08-31T07:00:00031 August 2025 07:00:00
[Table view]Agreement State Stolen Density Gauge ENS 556422021-12-09T05:00:0009 December 2021 05:00:00 Agreement State Lost Portable Troxler Gauge ENS 474512011-11-15T00:20:00015 November 2011 00:20:00 Agreement State Agreement State Report - Theft of a Troxler Density Gauge ENS 408572004-07-08T17:00:0008 July 2004 17:00:00 Agreement State Tennessee Agreement State Report: Stolen Moisture Density Gauge 2025-08-31T07:00:00 | |