ENS 45111: Difference between revisions
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| event date = 06/01/2009 16:50 PDT | | event date = 06/01/2009 16:50 PDT | ||
| last update date = 06/15/2009 | | last update date = 06/15/2009 | ||
| title = Loss | | title = Loss of Tsc Air Conditioning Unit Compressor | ||
| event text = On 5/20/09, the Technical Support Center (TSC) air conditioning unit compressor failed to restart following refueling outage electrical bus maintenance. On 5/31/09, the compressor was discovered to be shorted to ground. The short renders the air conditioning unit nonfunctional and at 1650 on 6/1/09 the nonfunctional air conditioner was determined to adversely affect TSC habitability based on meteorological conditions. TSC filtration capabilities are not affected by this problem. The nonfunctional air conditioner leaves the TSC in a degraded state; however, the TSC is currently habitable and available for service. Should the TSC need to be activated, habitability of the TSC will be monitored per existing plant procedures. Relocation of the TSC to an alternate location would be performed in accordance with station procedures as necessary to ensure continued TSC functionality. The control room and all other emergency response facilities are unaffected by the TSC chiller outage. Work instructions to repair the chiller are in review and work is expected to commence on June 2nd and proceed with high priority. A follow-up notification will be made when the TSC chiller has been restored. This event is being reported as a loss of emergency preparedness capabilities in accordance with 10 CFR 50.72(b)(3)(xiii). The NRC resident has been notified. | | event text = On 5/20/09, the Technical Support Center (TSC) air conditioning unit compressor failed to restart following refueling outage electrical bus maintenance. On 5/31/09, the compressor was discovered to be shorted to ground. The short renders the air conditioning unit nonfunctional and at 1650 on 6/1/09 the nonfunctional air conditioner was determined to adversely affect TSC habitability based on meteorological conditions. TSC filtration capabilities are not affected by this problem. The nonfunctional air conditioner leaves the TSC in a degraded state; however, the TSC is currently habitable and available for service. Should the TSC need to be activated, habitability of the TSC will be monitored per existing plant procedures. Relocation of the TSC to an alternate location would be performed in accordance with station procedures as necessary to ensure continued TSC functionality. The control room and all other emergency response facilities are unaffected by the TSC chiller outage. Work instructions to repair the chiller are in review and work is expected to commence on June 2nd and proceed with high priority. A follow-up notification will be made when the TSC chiller has been restored. This event is being reported as a loss of emergency preparedness capabilities in accordance with 10 CFR 50.72(b)(3)(xiii). The NRC resident has been notified. | ||
* * * UPDATE AT 1503 EDT ON 6/15/09 FROM RULLMAN TO HUFFMAN * * * | * * * UPDATE AT 1503 EDT ON 6/15/09 FROM RULLMAN TO HUFFMAN * * * | ||
Latest revision as of 22:11, 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:+1.07 h0.0446 days <br />0.00637 weeks <br />0.00147 months <br />) | |
| Opened: | Bruce Hugo 00:54 Jun 2, 2009 |
| NRC Officer: | John Knoke |
| Last Updated: | Jun 15, 2009 |
| 45111 - NRC Website
| |