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Event Notification Report for February 20, 2022

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
02/19/2022 - 02/20/2022

EVENT NUMBERS
55753
Agreement State
Event Number: 55753
Rep Org: California Radiation Control Prgm
Licensee: Ninyo and Moore
Region: 4
City: Irvine   State: CA
County:
License #: 7633-30
Agreement: Y
Docket:
NRC Notified By: Donald Oesterle
HQ OPS Officer: Karen Cotton-Gross
Notification Date: 02/23/2022
Notification Time: 15:27 [ET]
Event Date: 02/20/2022
Event Time: 00:00 [PST]
Last Update Date: 02/23/2022
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
O'Keefe, Neil (R4)
NMSS_Events_Notification, (EMAIL)
ILTAB, (EMAIL)
CNSNS (Mexico), (EMAIL)
Event Text
EN Revision Imported Date: 3/23/2022

EN Revision Text: AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following information was provided by the California Department of Public Health via email:

"Ninyo and Moore, a geotechnical and environmental sciences firm reported the theft of a Troxler 3430 moisture density gauge No. 38218, containing a Cs-137 sealed source of 0.3 GBq (8 mCi) and Am-241 sealed source of 1.48 GBq (40 mCi). The theft occurred from a temporary job site in Visalia, CA, The locked 10' X 20' Conex job box had the locks cut off and the entire secured Knack box containing the Type A transport container and gauge was taken. Construction tools totaling approximately $12,000 were stolen. Visalia Police Department was notified and an officer took a theft report and is looking for video surveillance in the area. Site security was not at the location at the time of the Sunday night theft."

California 5010 Number: 022222

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