ENS Event | |
|---|---|
16:30 Nov 4, 2012 | |
| Title | Technical Specification Required Shutdown Due to Secondary Side Steam Leak |
| Event Description | At 1115 EST on November 4, 2012, primary coolant loop #2 was declared inoperable due to a small un-isolable steam leak on a drain valve of an atmospheric steam dump valve on the secondary side of the 'B' Steam Generator. The valve is ASME Class II high energy piping and the non-conforming condition could not be evaluated with the steam generator pressurized. Based on the condition of the valve and the inability to evaluate, Technical Specification 3.4.4, PCS loops - Modes 1 and 2, Required Action A.1 was entered which requires the plant to be placed in Mode 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Repair of the valve may require cooldown to Mode 5.
At 1230 EST on November, 2012, Palisades initiated a shutdown in accordance with Technical Specification 3.4.4. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Palisades  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.63 h-0.0679 days <br />-0.0097 weeks <br />-0.00223 months <br />) | |
| Opened: | Todd Mulford 14:52 Nov 4, 2012 |
| NRC Officer: | John Knoke |
| Last Updated: | Nov 4, 2012 |
| 48478 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (47 %) |
WEEKMONTHYEARENS 490022013-05-05T05:12:0005 May 2013 05:12:00
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