ENS 48101: Difference between revisions
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| event date = 07/12/2012 13:15 PDT | | event date = 07/12/2012 13:15 PDT | ||
| last update date = 07/12/2012 | | last update date = 07/12/2012 | ||
| title = Power Supply Problems | | title = Power Supply Problems to Various Area Rad Monitors | ||
| event text = At 13:15 PDT on 7-12-2012, during the performance of an annual surveillance, power supply ARM-E/S-603A was discovered to have out of tolerance voltage readings. ARM-E/S-603A was declared non-functional. This resulted in a loss of the ability to monitor and quantify radiological conditions in multiple areas of the reactor building, due to the loss of ARM-RIS-1 thru 10 (area radiation monitor radiation indicating switches 1 thru 10). | | event text = At 13:15 PDT on 7-12-2012, during the performance of an annual surveillance, power supply ARM-E/S-603A was discovered to have out of tolerance voltage readings. ARM-E/S-603A was declared non-functional. This resulted in a loss of the ability to monitor and quantify radiological conditions in multiple areas of the reactor building, due to the loss of ARM-RIS-1 thru 10 (area radiation monitor radiation indicating switches 1 thru 10). | ||
The loss of ability to monitor and quantify radiological conditions in multiple areas of the reactor building represents a major loss of emergency assessment capability per 10 CFR 50.72(b)(3)(xiii). As directed by station procedures, compensatory measures have been enacted to have Health Physics personnel tour the affected areas once per shift to document and trend the radiological conditions. ARM-RIS-1 and 4 thru 10 are used for EAL determinations. | The loss of ability to monitor and quantify radiological conditions in multiple areas of the reactor building represents a major loss of emergency assessment capability per 10 CFR 50.72(b)(3)(xiii). As directed by station procedures, compensatory measures have been enacted to have Health Physics personnel tour the affected areas once per shift to document and trend the radiological conditions. ARM-RIS-1 and 4 thru 10 are used for EAL determinations. | ||
Latest revision as of 21:03, 1 March 2018
| Where | |
|---|---|
Columbia Generating Station  Washington (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+3.23 h0.135 days <br />0.0192 weeks <br />0.00442 months <br />) | |
| Opened: | Bill Hart 23:29 Jul 12, 2012 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Jul 12, 2012 |
| 48101 - NRC Website
| |