ENS 42932

v t e ENS Event
09:30 Oct 23, 2006
Title	Agreement State Report - Damaged Moisture Density Gauge
Event Description	The State provided the following information via e-mail: At 2:30 a.m. a Smith Emery employee was taking backscatter measurements on Highway 99 North in Stockton, California just south of the Fremont off ramp. One lane was restricted to traffic while the Smith Emery employee took backscatter measurements to determine asphalt density. Shortly thereafter a semi-tractor and trailer crossed the barriers into the restricted lane and ran over the CPN MC3 gauge (#m37107963). The gauge outer case was destroyed and the source rod was broken off and carried away from the gauge down the road. The source rod contained 10 mCi of cesium 137. The 50 mCi americium source remained affixed to the portion of the gauge case that was intact. The licensee quickly notified the California Department of Emergency Services, who notified the Radiological Health Branch. Following the incident, the licensee restricted access to the area where the gauge was ran over and awaited the RSO to arrive. The RSO arrived around 6:30 am and with assistance from the Stockton FD, determined the gauge sources were intact and placed them in their transport case to transport to CPN, the gauge manufacturer. CPN leak tested the sources and their was no leakage or contamination found. CA Assignment number 102306

ENS 42932 +/-
Where
Smith Emery Stockton, California (NRC Region 4)
License number:	3789-38
Organization:	California Radiation Control Prgm
Reporting

Agreement State
Time - Person (Reporting Time:+29.35 h1.223 days <br />0.175 weeks <br />0.0402 months <br />)
Opened:	K. Prendergast 14:51 Oct 24, 2006
NRC Officer:	Joe O'Hara
Last Updated:	Oct 24, 2006
42932 - NRC Website
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Smith Emery with Agreement State
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