ENS Event | |
|---|---|
18:30 Jul 12, 2011 | |
| Title | Moisture Density Gauge Shutter Stuck in the Closed Position |
| Event Description | Tennessee Valley Authority Paradise Fossil Plant uses an Ohmart Model SR1-A density gauge with a sealed source containing up to 1,562 milliCuries of Cesium 137. The gauge is used to monitor the density of the limestone slurry at the Unit 2 scrubber. On July 12, 2011 at 1330 (CDT) the shutter on the density gauge was determined to be not operable. It was determined that the shutter failed in the closed position when the operator received a slurry density high alarm.
The shutter failure is in the closed and safe position. The gauge has been entered into the corrective action program and will be repaired by the manufacturer at a later time. There were no personnel exposures, no damages to other equipment, and no additional compensatory actions necessary since the shutter is failed closed/safe position. The licensee notified the R2DO (Freeman). |
| Where | |
|---|---|
| Tennessee Valley Authority Drakesboro, Kentucky (NRC Region 1) | |
| License number: | 16-25243-01 |
| Organization: | Paradise Fossil Plant |
| Reporting | |
| 10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure | |
| Time - Person (Reporting Time:+19.92 h0.83 days <br />0.119 weeks <br />0.0273 months <br />) | |
| Opened: | Kevin Casey 14:25 Jul 13, 2011 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Jul 13, 2011 |
| 47046 - NRC Website
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Tennessee Valley Authority with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 491992013-07-17T15:30:00017 July 2013 15:30:00
[Table view]10 CFR 30.50(b)(2) Moisture Gauge Shutter Stuck in Open Position ENS 470462011-07-12T18:30:00012 July 2011 18:30:00 10 CFR 30.50(b)(2) Moisture Density Gauge Shutter Stuck in the Closed Position 2013-07-17T15:30:00 | |