ENS 54567
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ENS Event | |
|---|---|
17:35 Mar 5, 2020 | |
| Title | Secondary Containment Momentarily Inoperable |
| Event Description | On March 05, 2020, at 1235 EST, with the reactor at 100 percent core thermal power and steady state conditions, plant personnel notified the main control room that both doors in the secondary containment airlock on the reactor building fifth floor were opened simultaneously for a period of approximately three seconds (i.e., from 12:35:00 to 12:35:03 EST). The failure of this interlock, which is intended to prevent both doors from being opened simultaneously, resulted in the Technical Specification (TS) Surveillance Requirement (SR) 3 .6.4.1.3 not being met. The maximum secondary containment pressure observed during that time remained within TS limits. There were no radiological releases associated with this event.
Declaring secondary containment inoperable as a result of not meeting TS SR 3.6.4.1.3 is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material. The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Fermi  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+-0.78 h-0.0325 days <br />-0.00464 weeks <br />-0.00107 months <br />) | |
| Opened: | Robert Kirchner 16:48 Mar 5, 2020 |
| NRC Officer: | Andrew Waugh |
| Last Updated: | Mar 5, 2020 |
| 54567 - NRC Website
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