ENS 53844: Difference between revisions
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| emergency class = Non Emergency | | emergency class = Non Emergency | ||
| notification date = 01/24/2019 11:14 | | notification date = 01/24/2019 11:14 | ||
| retracted = Yes | |||
| notification by = Lawrence Gray | | notification by = Lawrence Gray | ||
| NRC officer = Donald Norwood | | NRC officer = Donald Norwood | ||
| event date = 01/24/2019 00:00 EST | | event date = 01/24/2019 00:00 EST | ||
| last update date = | | last update date = 02/18/2019 | ||
| title = | | title = En Revision Imported Date 2/19/2019 | ||
| event text = The following was received via e-mail: | | event text = EN Revision Text: FAILURE TO CLOSE AND LOCK NUCLEAR GAUGE SHUTTER | ||
The following was received via e-mail: | |||
Between 2200 EST on January 23, 2019 and 0000 EST on January 24, 2019 a Ronan RLL1 [Density Scale Source] was unbolted from the frame on which it was mounted and placed on the floor. (Source was a Cs-137 0.54 milliCurie decayed to 0.45 milliCurie, Serial #212785A) | Between 2200 EST on January 23, 2019 and 0000 EST on January 24, 2019 a Ronan RLL1 [Density Scale Source] was unbolted from the frame on which it was mounted and placed on the floor. (Source was a Cs-137 0.54 milliCurie decayed to 0.45 milliCurie, Serial #212785A) | ||
No permit was pulled to remove the scale source, and the shutter wasn't closed and locked out. | No permit was pulled to remove the scale source, and the shutter wasn't closed and locked out. | ||
| Line 27: | Line 29: | ||
The RSO then authorized a permit. | The RSO then authorized a permit. | ||
Once the source was secured, and permit posted, the RSO did a full investigation. | Once the source was secured, and permit posted, the RSO did a full investigation. | ||
Basic cause - The maintenance employee that unbolted the source entered the area from a direction that could only be accessed during a maintenance down. There was a radiation label on the scale itself, but no sign from his access point. | Basic cause - The maintenance employee that unbolted the source entered the area from a direction that could only be accessed during a maintenance down. There was a radiation label on the scale itself, but no sign from his access point. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/ | * * * RETRACTION ON 2/18/19 AT 1311 EST FROM LAWRENCE GRAY TO THOMAS KENDZIA * * * | ||
Based on the findings of an NRC inspector, this event was determined to not be reportable since the shutter was fully functional and no exposure to personal occurred. | |||
Notified R3DO (Duncan), NMSS Events Notification Group by email. | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190219en.html#en53844 | |||
}} | }} | ||
{{ENS-Nav}} | {{ENS-Nav}} | ||
Latest revision as of 07:30, 19 February 2019
| Where | |
|---|---|
| Tilden Mining Company L.C. Ishpeming, Michigan (NRC Region 3) | |
| License number: | 21-26748-01 |
| Organization: | Tilden Mining Company L.C. |
| Reporting | |
| 10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure | |
| Time - Person (Reporting Time:+6.23 h0.26 days <br />0.0371 weeks <br />0.00853 months <br />) | |
| Opened: | Lawrence Gray 11:14 Jan 24, 2019 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Feb 18, 2019 |
| 53844 - NRC Website | |