ENS 45445
From kanterella
Jump to navigation
Jump to search
ENS Event | |
---|---|
14:44 Oct 19, 2009 | |
Title | Manual Reactor Trip Following Stuck Open Moisture Separator Heater Relief Valve |
Event Description | At approximately 0915 CDT on 10/19/09 a Waterford 3 Moisture Separator Heater shell-slide relief valve (RS-203B) inadvertently opened, causing reactor power to increase from 100% to approximately 100.27% Rated Thermal Power (RTP). Operations reduced Main Turbine-Generator load by approximately 26 megawatts to restore reactor power to less than 100% RTP. At approximately 0942 CDT, Operations commenced a rapid plant shutdown because the relief valve would not re-close. At approximately 0944 CDT, Operations manually tripped the reactor due to a low condenser hot well level, just prior to reaching the Condensate Pumps Trip setpoint, to avoid a loss of Main Feedwater event. The Plant Protection System (PPS) responded as designed, resulting in an uncomplicated reactor trip.
Emergency Feedwater Actuation Signal (EFAS) was received on low Steam Generator level as expected from reactor trip at or near full power. Steam Generator levels remained above the EFAS injection level setpoint so that actual injection of Emergency Feedwater did not occur. No other PPS actuation occurred. The plant is currently being maintained in Mode 3. Waterford 3 plans to commence refueling outage (RF16) at this time, approximately 1 - 2 days earlier than scheduled. The licensee notified the NRC Resident Inspector. |
Where | |
---|---|
Waterford Louisiana (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
Time - Person (Reporting Time:+-0.52 h-0.0217 days <br />-0.0031 weeks <br />-7.12296e-4 months <br />) | |
Opened: | Joe Williams 14:13 Oct 19, 2009 |
NRC Officer: | Pete Snyder |
Last Updated: | Oct 19, 2009 |
45445 - 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 45445\u003C/a\u003E - \u003Ca href=\"/Waterford\" title=\"Waterford\"\u003EWaterford\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EManual Reactor Trip Following Stuck Open Moisture Separator Heater Relief Valve\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 45445 - Waterford\n","link":"","lat":29.993747222222222,"lon":-90.4687111111111,"icon":"/w/images/7/79/Entergy_icon.png"}],"imageoverlays":null} | |
Unit 3 | |
---|---|
Reactor critical | Critical |
Scram | Yes, Manual Scram |
Before | Power Operation (100 %) |
After | Hot Standby (0 %) |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_45445&oldid=88927"