ENS 51732
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ENS Event | |
|---|---|
08:06 Feb 13, 2016 | |
| Title | Secondary Containment Inoperable |
| Event Description | On 02/13/2016 at 0206 CST, an unexpected trip of a Fuel Building ventilation exhaust fan occurred and secondary containment differential pressure became positive. Secondary containment was declared INOPERABLE when Technical Specification-required differential pressure was not being maintained and entered LCO 3.6.4.1 Action A.1
At 0256 (CST), the standby gas treatment system was started and secondary containment differential pressure was restored to Technical Specification requirements at 0257 CST. This loss of secondary containment is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented fulfillment of a safety function needed to control the release of radioactive material. The cause of the fuel building exhaust fan trip is unknown at this time. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| LER: | 05000461/LER-2016-002 |
| Time - Person (Reporting Time:+1.05 h0.0438 days <br />0.00625 weeks <br />0.00144 months <br />) | |
| Opened: | Randall Moore 09:09 Feb 13, 2016 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Feb 13, 2016 |
| 51732 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (99 %) |
| After | Power Operation (99 %) |
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