ENS 52936
ENS Event | |
|---|---|
17:00 Aug 29, 2017 | |
| Title | Technical Specification Required Shutdown |
| Event Description | On August 22, 2017 at 2321 hours0.0269 days <br />0.645 hours <br />0.00384 weeks <br />8.831405e-4 months <br />, Grand Gulf Nuclear Station entered Technical Specification conditions for three Limiting Condition for Operations (LCOs) not met due to Residual Heat Removal 'A' (RHR 'A') being declared inoperable.
LCOs not met: 1) 3.5.1 for one low pressure ECCS [Emergency Core Cooling System] injection/spray subsystem. 2) 3.6.1.7 for one RHR containment spray subsystem, and 3) 3.6.2.3 for one RHR suppression pool cooling subsystem. The station has made the decision to shutdown the plant based on the results of troubleshooting performed on the RHR 'A' pump. The restoration of RHR 'A' pump will not be completed prior to the end of the 7 day LCO completion time. Grand Gulf Nuclear Station initiated plant shutdown required by Technical Specifications 3.5.1, 3.6.1.7, and 3.6.2.3 at 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> CDT on 08/29/2017 due to expected restoration of RHR 'A' exceeding the completion time of 7 days prior to restoring operability. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
| Grand Gulf Mississippi (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-2.3 h-0.0958 days <br />-0.0137 weeks <br />-0.00315 months <br />) | |
| Opened: | Ryan Meyer 14:42 Aug 29, 2017 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Aug 29, 2017 |
| 52936 - NRC Website
Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 52936\u003C/a\u003E - \u003Ca href=\"/Grand_Gulf\" title=\"Grand Gulf\"\u003EGrand Gulf\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ETechnical Specification Required Shutdown\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 52936 - Grand Gulf\n","link":"","lat":32.009233333333334,"lon":-91.04695833333334,"icon":"/w/images/7/79/Entergy_icon.png"}],"imageoverlays":null} | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (65 %) |
| After | Power Operation (65 %) |
WEEKMONTHYEARENS 560592022-08-20T04:42:00020 August 2022 04:42:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 529362017-08-29T17:00:00029 August 2017 17:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 522252016-09-08T08:00:0008 September 2016 08:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to Loss of Residual Heat Removal Pump 2022-08-20T04:42:00 | |