ENS 46420
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ENS Event | |
|---|---|
17:30 Nov 15, 2010 | |
| Title | Agreement State Report - Fly Ash Density Gauge Shutter Fails Open |
| Event Description | The following report was received via fax:
The licensee uses fixed industrial gauges for measuring densities in fly ash hoppers at the Stations precipitator building. The industrial fixed gauges contain a Cesium 137 sealed source. The Cesium 137 sources were originally installed in April 1984 and at the time contained 50 milliCuries per source. The sources were manufactured and installed by Kay Ray, Inc. The gauge is Model No. 7080 and housing serial number 16785-G. The source capsule manufacturer was Amersham model no. CDC 800 and K-R ref. number serial number 15485 V. The Authorized User was performing the semi-annual 'Shutter Function Test' on Unit #3's precipitator sources. The 'external' source closure mechanism for the 3FA-1B & 2B hoppers did not operate as designed and the shutter did not close when the handle on the floor was operated. The external closure cable had detached from the shutter arms. In this condition, when the shutter closure mechanism was moved, the cable that operates the source shutter mechanism 20 feet above the floor did not move the shutter to the closed position. It should be noted that this cable is an older one which has been slated for replacement. This event happened at 11:30 am. The event was reported to the Lab Supervisor and the Radiation Safety Officer (RSO) at the Ft. Calhoun Power Station was notified. No personnel were exposed to radiation during this event. |
| Where | |
|---|---|
| Omaha Public Power District Omaha, Nebraska (NRC Region 4) | |
| License number: | 01-39-04 |
| Organization: | Ne Div Of Radioactive Materials |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+1.12 h0.0467 days <br />0.00667 weeks <br />0.00153 months <br />) | |
| Opened: | Wayne Gilsdorf 18:37 Nov 15, 2010 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Nov 15, 2010 |
| 46420 - NRC Website
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Omaha Public Power District with Agreement State | |
WEEKMONTHYEARENS 507802015-01-30T14:20:00030 January 2015 14:20:00
[Table view]Agreement State Agreement State Report - Fixed Gauge Shutter Failed to Close ENS 504932014-09-23T16:50:00023 September 2014 16:50:00 Agreement State Agreement State Report - Failure of a Process Gauge Shutter ENS 497972014-02-05T16:30:0005 February 2014 16:30:00 Agreement State Agreement State Report - Malfunctioning Source Shutter Failed to Close ENS 492382013-08-05T14:50:0005 August 2013 14:50:00 Agreement State Agreement State Report - Shutter Stuck on a Process Gauge ENS 466322011-02-20T14:30:00020 February 2011 14:30:00 Agreement State Agreement State Report - Fly Ash Gauge Shutter Failure ENS 464202010-11-15T17:30:00015 November 2010 17:30:00 Agreement State Agreement State Report - Fly Ash Density Gauge Shutter Fails Open ENS 464042010-11-08T16:15:0008 November 2010 16:15:00 Agreement State Agreement State Report - Process Gauge Shutter Could Not Be Locked Closed ENS 460582010-06-30T16:00:00030 June 2010 16:00:00 Agreement State Agreement State Report - Shutter on Fixed Industrial Gauge Failed to Close ENS 459072010-05-06T18:46:0006 May 2010 18:46:00 Agreement State Agreement State Report - Process Gauge Shutter Malfunction ENS 458012010-03-27T14:50:00027 March 2010 14:50:00 Agreement State Agreement State Report - Fixed Density Gauge Stuck Shutter ENS 457942010-03-25T16:35:00025 March 2010 16:35:00 Agreement State Process Gauge Shutter Malfunction ENS 440012008-01-29T06:00:00029 January 2008 06:00:00 Agreement State Agreement State Report - Missing Tritium Sign 2015-01-30T14:20:00 | |
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