ENS 51650
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ENS Event | |
|---|---|
19:40 Jan 12, 2016 | |
| Title | Momentary Loss of Secondary Containment |
| Event Description | On January 12, 2016, at 1340 CST, an alarm was received indicating secondary containment differential pressure rose unexpectedly above the Technical Specification Surveillance Requirement, SR 3.6.4.1.1, limit of 0.10 inch of vacuum water gauge. A reactor building supply fan was immediately secured to restore differential pressure below the Technical Specification limit. The secondary containment differential pressure returned to below the Technical Specification limit within one minute. The Standby Gas Treatment System remained in standby, and fully operable. At 1341 CST, the secured reactor building supply fan was restarted to restore the normal ventilation lineup. The secondary containment differential pressure remained below the Technical Specification limit. Troubleshooting is in progress.
This condition represents a failure to meet Surveillance Requirement 3.6.4.1.1. As a result, entry into Technical Specification 3.6.4.1, Condition A, was made momentarily due to secondary containment being inoperable. Given the temporary loss of secondary containment, this event is reportable under 50.72(b)(3)(v)(c) as an event or condition that could have prevented the fulfillment of a safety function. The NRC Senior Resident Inspector has been notified. |
| Where | |
|---|---|
Quad Cities  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| LER: | 05000254/LER-2016-001 |
| Time - Person (Reporting Time:+-0.53 h-0.0221 days <br />-0.00315 weeks <br />-7.25994e-4 months <br />) | |
| Opened: | Gary Heusinkveld 19:08 Jan 12, 2016 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Jan 12, 2016 |
| 51650 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Quad Cities with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
WEEKMONTHYEARENS 559762022-07-04T06:30:0004 July 2022 06:30:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Trains of Standby Gas Treatment Inoperable ENS 531892018-01-31T19:10:00031 January 2018 19:10:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 525082017-01-24T16:00:00024 January 2017 16:00:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Interlock Doors Open Simultaneously ENS 516592016-01-16T02:38:00016 January 2016 02:38:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 516502016-01-12T19:40:00012 January 2016 19:40:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 511652015-06-19T06:53:00019 June 2015 06:53:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Interlock Doors Open Simultaneously ENS 510212015-04-28T14:35:00028 April 2015 14:35:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Two Secondary Containment Interlock Doors Open Simultaneously ENS 508032015-02-10T16:55:00010 February 2015 16:55:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Interlock Doors Open Simultaneously ENS 506222014-11-18T15:00:00018 November 2014 15:00:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Interlock Doors Open Simultaneously ENS 501322014-05-23T02:50:00023 May 2014 02:50:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Hpci Secondary Containment Airlock Doors Open Simultaneously ENS 499842014-04-01T18:57:0001 April 2014 18:57:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Unit 2 Secondary Containment Interlocked Doors Opened Simultaneously ENS 498702014-03-05T01:17:0005 March 2014 01:17:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 497272014-01-15T13:23:00015 January 2014 13:23:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Drywell Radiation Monitor Inoperable ENS 485272012-11-20T19:21:00020 November 2012 19:21:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Drywell Radiation Monitor Inoperable ENS 483322012-09-21T19:49:00021 September 2012 19:49:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Drywell Radiation Monitor Inoperable ENS 482822012-09-06T18:14:0006 September 2012 18:14:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Loss of Secondary Containment Ventilation for Eight Seconds 2022-07-04T06:30:00 | |
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