Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 54462 | 2 January 2020 06:00:00 | 10 CFR 30.50(b)(2) | Stuck Open Process Gauge Shutter | On 1/2/2020, it was discovered that the shutter on a centrifuge process level gauge was stuck in the open position. The gauge is a Berthold model LB7442F, serial number 6005 containing a 3000 mCi Cs-137 source. The source serial number is 5559GN. The shutter is normally open during process operation and closed during maintenance. Red tape and plywood have been erected in order to prevent inadvertent personnel entry into the area. No over-exposures have occurred. A Berthold representative should be on-site next week to repair the shutter. | ||
| ENS 45373 | 18 September 2009 04:00:00 | 10 CFR 30.50(b)(2) | Gauge Shutter Stuck Open | On Sept 21, 2009, (the licensee discovered) a stuck shutter on an ammonia tank (top) in the catalyst area. The gauge is an Ohmart Model SH-F2, Serial 64692, containing 800 millicuries of Cesium-137. The gauge was originally installed in 2006. The stuck shutter was discovered during a routine 6 month shutter check on Sept 18, 2009. The technician tried to electrically close the shutter, but was unable to do so. (The licensee has) scheduled a service provider for repair within the week. The source is safely mounted on the side of a tank, (and the licensee) expects no exposure to occur. The Ohmart manufacturer was contacted.
An Ohmart service representative responded to the site to repair the gauge. It was determined that a fuse had blown in the gauge actuating circuit and that the shutter was not mechanically stuck. The gauge has been repaired and returned to service. R1DO (DeFrancisco) and FSME EO (McIntosh) have been notified. |