ENS 45663
From kanterella
Jump to navigation
Jump to search
ENS Event | |
|---|---|
21:25 Jan 26, 2010 | |
| Title | Entry Into Technical Specification Required Shutdown |
| Event Description | While operating in mode 1 at 100% power, [the licensee] identified [a] failure to comply with Technical Requirements [TR] Manual 3.7.20, Snubbers, Condition C. [The] required action C.1 requires the performance of an inspection of required snubbers affected by transient in accordance with Table TR 3.7.20-1 within 6 months of the event. WCNOC [Wolf Creek Nuclear Operating Corporation] determined that a portion of the required inspections was not completed for transients that occurred during Refueling Outage 16 (Spring 2008). TR 3.7.20, Snubbers, Condition D requires affected systems to be declared inoperable immediately. No major equipment was out of service prior to the event.
At 1525 CST, TS [Technical Specification] LCO [Limiting Condition of Operation] 3.7.8, Essential Service Water (ESW) System, was declared not met, [and therefore], both trains of ESW [were declared] inoperable. With both trains of ESW inoperable, TS LCO 3.0.3 was entered and preparations for unit shutdown commenced. Additionally, with both trains of ESW inoperable both Emergency Diesel Generators were declared inoperable. TS LCO 3.8.1, AC Sources - Operating, Conditions B and F were entered. Actions to complete required inspections per TR 3.7.20 Table TR 3.7.20-1 have been initiated. Shutdown was commenced at 1618 CST. NRC Senior Resident was notified 1/26/2010 15:30 CST regarding entry into TS LCO 3.0.3.
The licensee completed inspection of Train "B" snubbers, and at 2013 CST, the licensee exited TS LCO 3.0.3 based on restoration of Train "B" of Essential Service Water System to operable status. Licensee is still inspecting Train "A" snubbers. The licensee has notified the NRC Resident Inspector. Notified R4DO (Greg Pick) |
| Where | |
|---|---|
Wolf Creek  Kansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.93 h-0.164 days <br />-0.0234 weeks <br />-0.00538 months <br />) | |
| Opened: | Jeff Isch 17:29 Jan 26, 2010 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Jan 26, 2010 |
| 45663 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (98 %) |
WEEKMONTHYEARENS 545082020-02-02T00:45:0002 February 2020 00:45:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to Containment Purge Valve Excessive Leakage ENS 522182016-09-02T13:08:0002 September 2016 13:08:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 510742015-05-16T02:48:00016 May 2015 02:48:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to 2 Ac Inverters Inoperable ENS 510712015-05-15T09:36:00015 May 2015 09:36:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to 2 Ac Inverters Inoperable ENS 494482013-10-18T17:11:00018 October 2013 17:11:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Loss of Cooling to Switchgear Rooms ENS 493392013-09-11T22:31:00011 September 2013 22:31:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Loss of Cooling to Switchgear Rooms ENS 491262013-06-17T16:11:00017 June 2013 16:11:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Non-Functional Class 1E Electrical A/C Unit ENS 490082013-05-06T22:33:0006 May 2013 22:33:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Required Due to Non-Functional Class 1E Air Conditioning Unit ENS 479982012-06-06T08:27:0006 June 2012 08:27:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Inadequate Cooling Available to Support Electrical Power Systems ENS 471542011-08-15T15:55:00015 August 2011 15:55:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown - Contaminated Oil Sample ENS 464572010-12-06T10:18:0006 December 2010 10:18:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Due to Exceeding Allowed Outage Time on the 'A' Emergency Diesel Generator ENS 463092010-10-05T03:00:0005 October 2010 03:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 461982010-08-23T13:14:00023 August 2010 13:14:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Due to Both Edgs and an Rhr Loop Inoperable ENS 459852010-06-07T23:44:0007 June 2010 23:44:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Voiding in the Component Cooling Water System ENS 456632010-01-26T21:25:00026 January 2010 21:25:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Entry Into Technical Specification Required Shutdown ENS 439852008-02-14T00:50:00014 February 2008 00:50:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification 3.0.3 Required Shutdown ENS 438952008-01-11T22:22:00011 January 2008 22:22:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech. Spec. Required Shutdown Due to Gas Voiding in Discharge Piping ENS 420042005-09-21T03:40:00021 September 2005 03:40:00 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Commenced Due to Inoperability of Residual Heat Removal Containment Sump Isolation Valves 2020-02-02T00:45:00 | |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_45663&oldid=88738"