ENS 50600: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 11/06/2014 11:16 MST | | event date = 11/06/2014 11:16 MST | ||
| last update date = 11/07/2014 | | last update date = 11/07/2014 | ||
| title = Technical Specification Required Shutdown Due | | title = Technical Specification Required Shutdown Due to Dropped Control Element Assembly | ||
| event text = On November 6, 2014 at 1116 Mountain Standard Time (MST), Control Element Assembly (CEA) 15 dropped fully into the core while all other CEAs remained fully withdrawn. Limiting Condition for Operation (LCO) 3.1.5 Condition A was entered for one CEA misaligned from its group which requires restoration of the CEA within 2 hours. An initial power reduction was performed upon receipt of the deviation in accordance with technical specifications. The CEA could not be aligned within 2 hours and LCO 3.1.5 Condition C was entered at 1316 MST which requires entry into Mode 3 within 6 hours. Power reduction continues as necessary to comply with technical specifications. | | event text = On November 6, 2014 at 1116 Mountain Standard Time (MST), Control Element Assembly (CEA) 15 dropped fully into the core while all other CEAs remained fully withdrawn. Limiting Condition for Operation (LCO) 3.1.5 Condition A was entered for one CEA misaligned from its group which requires restoration of the CEA within 2 hours. An initial power reduction was performed upon receipt of the deviation in accordance with technical specifications. The CEA could not be aligned within 2 hours and LCO 3.1.5 Condition C was entered at 1316 MST which requires entry into Mode 3 within 6 hours. Power reduction continues as necessary to comply with technical specifications. | ||
No major equipment was inoperable prior to the event that contributed to the event. No emergency classification was required per the Emergency Plan. No automatic essential safety feature actuations occurred and none were required. The Emergency Diesel Generators did not start and were not required. Safety related buses remain energized. The offsite power grid is stable. Other LCOs were entered as required by technical specifications. | No major equipment was inoperable prior to the event that contributed to the event. No emergency classification was required per the Emergency Plan. No automatic essential safety feature actuations occurred and none were required. The Emergency Diesel Generators did not start and were not required. Safety related buses remain energized. The offsite power grid is stable. Other LCOs were entered as required by technical specifications. | ||
Latest revision as of 20:49, 1 March 2018
| Where | |
|---|---|
Palo Verde  Arizona (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| LER: | 05000529/LER-2014-002 |
| Time - Person (Reporting Time:+0.1 h0.00417 days <br />5.952381e-4 weeks <br />1.3698e-4 months <br />) | |
| Opened: | Robert Warner 18:22 Nov 6, 2014 |
| NRC Officer: | Dong Park |
| Last Updated: | Nov 7, 2014 |
| 50600 - NRC Website
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