ENS 49008
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ENS Event | |
|---|---|
22:33 May 6, 2013 | |
| Title | Technical Specification Shutdown Required Due to Non-Functional Class 1E Air Conditioning Unit |
| Event Description | Class 1E Air Conditioning Unit SGK05A cools safety related electrical Train 'A' and was declared non-functional at 1733 hours0.0201 days <br />0.481 hours <br />0.00287 weeks <br />6.594065e-4 months <br />. As a result, the following safety related electrical equipment was declared inoperable: 4.16 KV Bus NB01; 480 volt buses NG01 and NG03; 120 volt Instrument AC inverters and buses NN11, NN13, NN01 and NN03; 125 VDC chargers and buses NK11, NK13, NK01 and NK03. T/S 3.0.3 was entered at 1733 from T/S 3.8.7 due to two out of four 120 volt AC inverters (NN11 and NN13) being inoperable. Plant shutdown to Mode 5 commenced at 1801 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.852805e-4 months <br />.
All electrical systems listed above remain functional but are declared inoperable due to inadequate room cooling capability. The licensee plans on performing a controlled plant shutdown using normal rod insertion following approved plant procedures. Per the licensee, Mode 3 conditions must be met by 0033 CDT 5/7/2013 and Mode 5 conditions must be met by 0033 CDT 5/8/2013. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Wolf Creek  Kansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-2.28 h-0.095 days <br />-0.0136 weeks <br />-0.00312 months <br />) | |
| Opened: | Pierce Moore 20:16 May 6, 2013 |
| NRC Officer: | Donald Norwood |
| Last Updated: | May 6, 2013 |
| 49008 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (70 %) |
WEEKMONTHYEARENS 545082020-02-02T00:45:0002 February 2020 00:45:00
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