ENS 57971

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v t e ENS Event
17:34 Oct 6, 2025
Title	Damaged Moisture Density Gauge
Event Description	The following information was provided by the Texas Department of State Health Services (the Department) via phone and email: On October 6, 2025, at 1324 CDT, the Department was notified by the licensee's radiation safety officer (RSO) that while performing a measurement with a Troxler model 3440 moisture/density gauge, the technician was struck and killed by a piece of equipment. The gauge contains a 40 millicurie americium-241 source and a 9 millicurie cesium-137 source. The gauge appeared to have some minor damage. The RSO stated the gauge was picked up by a member of the HAZMAT team and placed on the tailgate of the licensee's truck. It was noted that the cesium source was sticking out of the bottom of the gauge about 2 inches. The HAZMAT team reported to the RSO the dose rate at 5 feet from the gauge was reading 5 rem per hour. (Calculation of the gamma dose from the cesium source at 5 feet would be 1.24 millirem/hr.). The RSO stated he had personnel and equipment at the site to measure the dose rate, but the emergency response personnel would not let them enter the area. The RSO stated they had evacuated all personnel out to 100 feet. At 1422 CDT, the RSO reported the police allowed them to enter the area and perform a radiation survey. The RSO reported their survey showed less than 1 millirem per hour at 5 feet from the gauge. The RSO stated they placed the gauge into the transport case and then into the steel security box in the truck bed to transport the gauge back to their office. The gauge will be sent to the manufacturer for inspection. Additional information will be provided as it is received in accordance with SA-300. Texas incident number: 10233

ENS 57971 +/-
Where
Terracon Consultants, Inc. Houston, Texas (NRC Region 4)
License number:	L 05268
Organization:	Texas Dept Of State Health Services
Reporting

Agreement State
Time - Person (Reporting Time:+0.08 h0.00333 days <br />4.761905e-4 weeks <br />1.09584e-4 months <br />)
Opened:	Art Tucker 17:39 Oct 6, 2025
NRC Officer:	Robert A. Thompson
Last Updated:	Oct 6, 2025
57971 - NRC Website
v • d • e

v t e Emergency Notification System
Terracon Consultants, Inc. with Agreement State
WEEKMONTHYEAR2025-10-06T17:34:00 [Table view]
[ENS list for Terracon Consultants, Inc.]

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