ENS 52996
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ENS Event | |
|---|---|
05:34 Sep 30, 2017 | |
| Title | Secondary Containment Declared Inoperable |
| Event Description | At 0134 [EDT] on September 30, 2017, Nine Mile Point Unit 2 entered Tech Spec 3.6.4.1 when secondary containment was declared inoperable due to secondary containment differential pressure being above the Tech Spec Surveillance Requirement of -0.25 inches vacuum water gauge. The Division II Standby Gas Treatment System was started to restore differential pressure at 0135 [EDT] on September 30, 2017 the differential pressure was restored, the secondary containment was declared operable and the Tech Spec3.6.4.1 exited.
Secondary containment being inoperable is a 8-hour report for 10 CFR 50.72(b)(3)(v)(C), Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident. The cause of this condition is being investigated. The NRC Resident Inspector has been notified. The licensee will also inform the State of New York. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+3.53 h0.147 days <br />0.021 weeks <br />0.00484 months <br />) | |
| Opened: | Chris Moorhead 09:06 Sep 30, 2017 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Sep 30, 2017 |
| 52996 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Nine Mile Point with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
WEEKMONTHYEARENS 529962017-09-30T05:34:00030 September 2017 05:34:00
[Table view]10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Declared Inoperable ENS 519692016-06-01T14:46:0001 June 2016 14:46:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Nine Mile Point Unit 1 Momentary Loss of Secondary Containment ENS 518562016-04-07T21:30:0007 April 2016 21:30:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Doors of Secondary Containment Open Simultaneously ENS 512892015-08-05T16:52:0005 August 2015 16:52:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 508602015-03-03T13:37:0003 March 2015 13:37:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment Due to Both Airlocks Opening at Same Time ENS 508132015-02-12T00:41:00012 February 2015 00:41:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Nine Mile Point Momentary Loss of Secondary Containment ENS 507322015-01-13T00:39:00013 January 2015 00:39:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Degraded Secondary Containment Differential Pressure ENS 505532014-10-20T17:53:00020 October 2014 17:53:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Secondary Containment Airlock Doors Open Simultaneously ENS 505422014-10-16T14:42:00016 October 2014 14:42:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 503632014-08-14T03:18:00014 August 2014 03:18:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Momentary Loss of Secondary Containment ENS 501872014-06-11T00:32:00011 June 2014 00:32:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Declared Inoperable ENS 499852014-04-02T05:23:0002 April 2014 05:23:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Inoperable Due to Two Air Lock Doors Open Simultaneously ENS 499482014-03-24T04:31:00024 March 2014 04:31:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Inoperable and Unplanned Isolation of the Reactor Building Vent Radiation Monitor ENS 499062014-03-12T18:22:00012 March 2014 18:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Inoperable and Unplanned Isolation of Building Vent Radiation Monitor ENS 490432013-05-15T23:34:00015 May 2013 23:34:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Primary Containment Airlock Non-Functional Due to Degraded Seal on Inner Door Concurrent with Personnel Passing Through the Outer Door ENS 473682011-10-24T05:52:00024 October 2011 05:52:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Both Divisions of the Rwcu High Differential Flow Isolation Function Removed from Service 2017-09-30T05:34:00 | |
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