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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 55625 | 3 December 2021 06:00:00 | 10 CFR 30.50(b)(2) | Damaged Density Gauge | The following is a summary of a phone call with Jacobi Geotechnical Engineering (licensee): On December 3, 2021, while on a jobsite in St. Peters, MO, the licensee's Humbolt 5001EZ density gauge was run over. The source rod was broken, but remained secured in the case. The Humbolt gauge serial number is 3141 and contains 10 mCi of Cs-137 and 40 mCi Am-241/Be. The licensee requested assistance to secure and dispose the gauge. The gauge was secured and packaged in a transportation box. No overexposures were reported. | ||
| ENS 43868 | 26 December 2007 16:00:00 | 10 CFR 30.50(b)(2) | Damaged Moisture Density Gauge | Radiation Health Physics consultants, R.M. Wester, notified the NRC of an event in the State of Missouri that resulted in damage to a Humboldt Soil Density Gauge (Model EZ 5001, S/N 693) containing 40 mCi Am-241/Be and 10 mCi Cs-137. The gauge is licensed to Jacobi Geotechnical Engineering. The consultant stated that the event took place at a construction site in Pezley, MO. The gauge was run over by a backhoe. There was some damage to the plastic housing of the gauge. The source rod was undamaged. The source rod was wipe tested with negative results. In addition, soil samples at the incident location also tested negative. R.M. Wester has taken possession of the gauge and will ship it to Humboldt for repairs. The licensee notified the NRC Resident Inspector.
Wester responded to the site at the time of the accident, and found no indication of leakage. The gauge was shipped to the manufacturer, Humboldt. Humboldt reports there is no leakage, and there is no indication of loss of safety function. R3DO (Hills) and FSME (Bubar) informed. |