The following event was received via e-mail from the
Mississippi State Department of Radiological Health:
On August 22, 2022, the [Radiation Safety Officer] RSO reported to the Mississippi Director of Radiological Health that a shutter was found stuck open during six month surveys. [The gauge is an Ohmart/Vega Model SH-F2-45, Serial Number 2933 CN, with a 100 mCi Cesium 137 source]. On August 31, 2022, source lock out procedures were implemented to allow a crew in the tank to inspect the tank. The gauge was locked out in the unshielded position. A confined entry crew of four workers were exposed for seventy-seven minutes and three workers were exposed for twenty-two minutes. On September 2, 2022 at approximately 1830 [CDT], the licensee RSO contacted the Radioactive Material Director regarding the exposures. On September 6, 2022 at 1247 [CDT], the inspector was notified of the incident, contacted the licensee, and will arrive on site on September 7, 2022. Findings and updates will be reported to the NRC after onsite investigation.
Mississippi Event Number: MS-220003