ENS 55015: Difference between revisions
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The licensee had a service provider operating under reciprocity with Iowa onsite November 17, 2020 to troubleshoot and repair the gauge. The root cause of the stuck shutter was a broken shutter return spring. A new shutter operating cylinder with a new return spring was installed and the gauge shutter was tested and found to be operating correctly. To minimize the chance of future shutter closure failures, the shutter operating cylinders will be replaced for all beta gauges of the same model that are currently in use at the site. Cylinder replacement will occur during future planned maintenance activities. These failures are exceedingly rare. This is the first occurrence in more than 20 years of using these gauges. The site is considering implementing a preventative maintenance replacement of these cylinders every 10 years. | The licensee had a service provider operating under reciprocity with Iowa onsite November 17, 2020 to troubleshoot and repair the gauge. The root cause of the stuck shutter was a broken shutter return spring. A new shutter operating cylinder with a new return spring was installed and the gauge shutter was tested and found to be operating correctly. To minimize the chance of future shutter closure failures, the shutter operating cylinders will be replaced for all beta gauges of the same model that are currently in use at the site. Cylinder replacement will occur during future planned maintenance activities. These failures are exceedingly rare. This is the first occurrence in more than 20 years of using these gauges. The site is considering implementing a preventative maintenance replacement of these cylinders every 10 years. | ||
Iowa report number: IA200004 | Iowa report number: IA200004 | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/ | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/20201210en.html#en55015 | ||
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Revision as of 07:30, 10 December 2020
| Where | |
|---|---|
| 3M Knoxville, Iowa (NRC Region 3) | |
| License number: | 0042163FG |
| Organization: | Iowa Department Of Public Health |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+363.92 h15.163 days <br />2.166 weeks <br />0.498 months <br />) | |
| Opened: | Randal Dahlin 09:55 Dec 1, 2020 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Dec 8, 2020 |
| 55015 - NRC Website | |