ENS 50630
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ENS Event | |
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16:22 Nov 20, 2014 | |
Title | Containment Declared Inoperable Due to Containment Fan Coil Leak |
Event Description | At 1022 CST on November 20, 2014, a cooling water leak of approximately 20 to 30 drops per minute was identified on the 14 Containment Fan Coil Unit NW side lower face gasket. Unit 1 Containment was declared inoperable, which required entry into Technical Specifications (TS) LCO 3.6.1 Condition A, containment inoperable, applicable in MODES 1, 2, 3, and 4. Immediate actions were taken to isolate the Fan Coil Unit within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> from the initial identification of the leak. 14 Containment Fan Coil Unit was isolated and Containment was declared operable and TS 3.6.1 Condition A was exited at 1109 CST. A Work Request (WR) was initiated and 14 Containment Fan Coil Unit has been restored to an operable condition.
This condition is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented fulfillment of the safety function of structures or systems that are needed to control the release of radioactive material. The plant remains in a safe condition and there was no effect to the health and safety of the public. The licensee has notified the NRC Resident Inspector. The licensee verified the other Unit 1 Containment Fan Coil Units did not have the same problem. |
Where | |
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Prairie Island ![]() Minnesota (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
Time - Person (Reporting Time:+0.12 h0.005 days <br />7.142857e-4 weeks <br />1.64376e-4 months <br />) | |
Opened: | Nathan Bibus 16:29 Nov 20, 2014 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Nov 20, 2014 |
50630 - NRC Website
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Unit 1 | |
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Reactor critical | Not Critical |
Scram | No |
Before | Hot Standby (0 %) |
After | Hot Standby (0 %) |
Prairie Island ![]() | |
WEEKMONTHYEARENS 508702015-03-07T17:55:0007 March 2015 17:55:00
[Table view]10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Containment Declared Inoperable Due to Containment Fan Coil Leak ENS 508082015-02-11T04:05:00011 February 2015 04:05:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Containment Declared Inoperable Due to Containment Fan Coil Leak ENS 506302014-11-20T16:22:00020 November 2014 16:22:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Containment Declared Inoperable Due to Containment Fan Coil Leak ENS 501232014-05-19T17:36:00019 May 2014 17:36:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Containment Declared Inoperable Due to Containment Fan Coil Leak ENS 500042014-04-07T11:00:0007 April 2014 11:00:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Control Room Special Vent Boundary Inoperable ENS 494952013-11-01T17:06:0001 November 2013 17:06:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Trains of Auxiliary Building Special Ventilation System Declared Inoperable ENS 492612013-08-10T01:28:00010 August 2013 01:28:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Inoperable Control Room Envelope ENS 488702013-03-31T04:44:00031 March 2013 04:44:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Trains of Auxiliary Building Special Ventilation System Declared Inoperable 2015-03-07T17:55:00 | |
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