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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 45123 | 11 June 2009 05:00:00 | Agreement State | Agreement State Report - Stuck Shutter | The following was received via E-mail: As we (the Texas Department of Health) understand it, a gauge, Ronan Eng. Co., Model SA-1 with 3Ci of Cs-137, has a broken handle and the shutter will not close. The serial number (S/N) is M7844 and I see that the source model could be 3M or QSA (AEA) so that will (be) determined later. It said that the external exposure rate is a nominal 1.5mR/hr and the gauge is 40' high on a vessel which is in process so no vessel entry is anticipated. They hope to keep operating until their next scheduled outage on July 15. | ||
| ENS 40992 | 20 July 2004 05:00:00 | Agreement State | Possible Radiation Exposure from a Level Detection Device | It has been determined that during a painting and insulation replacement: job on the exterior of the D-15 vessel at the Solvents Plant at Dow's Plaquemine manufacturing complex, a radiation shield was not locked out on a 500 mCi Cs-137 radiation source used for level detection. The zone of potential exposure was approximately 3 inches wide by 14 inches long on the external top of the tank. The work that was being performed was in such a manner that there could have been a possibility of hand or arm exposure. During the six day period it was determined that up to 16 persons had the potential to be exposed while completing the insulation replacement. A conservative estimate of 5 minutes total continuous exposure time over this period at a distance of 5 inches from the source yield a potential exposure of 421 mrems. A two minute total continuous exposure at a distance of 14 inches would yield a potential exposure of 31 mrems. The cause of the incident was failure to lock out a radiation shield prior to commencement of work. Lock out procedures for the facility have been reviewed and strengthened to prevent reoccurrence. Medical screening was performed on all potentially exposed personnel and the results were reviewed with the personnel. No effects were observed. |