ENS 50808
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ENS Event | |
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04:05 Feb 11, 2015 | |
Title | Containment Declared Inoperable Due to Containment Fan Coil Leak |
Event Description | At 2205 CST on February 10, 2015, a cooling water leak of approximately 60 to 90 drops per minute was identified on the 14 Containment Fan Coil Unit Cooling Water face gasket. As a result, Unit 1 Containment was declared inoperable. This required entry into Technical Specifications (TS) LCO 3.6.1 Condition A, Containment inoperable, applicable in MODES 1, 2, 3, and 4. Immediate action was 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.
After isolating the cooling water leak to 14 Containment Fan Coil Unit, containment was declared operable and TS 3.6.1 Condition A was exited at 2232 CST. A Work Request (WR) has been initiated to restore 14 Containment Fan Coil Unit 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. |
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:+1.12 h0.0467 days <br />0.00667 weeks <br />0.00153 months <br />) | |
Opened: | Nathan Bibus 05:12 Feb 11, 2015 |
NRC Officer: | Jeff Rotton |
Last Updated: | Feb 11, 2015 |
50808 - 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 with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
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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