ENS 45348
From kanterella
Revision as of 21:11, 1 March 2018 by StriderTol (talk | contribs) (Created page by program invented by StriderTol)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
ENS Event | |
---|---|
02:44 Sep 14, 2009 | |
Title | Manual Reactor Scram Due to Short Period During Plant Shutdown |
Event Description | During the scheduled shutdown to commence the Peach Bottom Unit 3 refueling outage, Unit 3 was manually shutdown using the mode switch in accordance with GP-3, 'Normal Plant Shutdown,' when reactor period lowered below 50 seconds as indicated on the WRNM [Wide Range Nuclear Monitoring] system. The Feedwater Startup Level Controller was in automatic set at 23" when a small addition of cold water added enough positive reactivity to cause reactor period to be less than 50 seconds. The shortest period observed was 44 seconds. The WRNM system RPS [Reactor Protective System] automatic SCRAM setpoint is 19 seconds.
All control rods inserted into the core. Decay heat is being removed by shutdown cooling. The plant is continuing into its scheduled refueling outage. The licensee notified the NRC Resident Inspector. |
Where | |
---|---|
Peach Bottom Pennsylvania (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
Time - Person (Reporting Time:+-0.92 h-0.0383 days <br />-0.00548 weeks <br />-0.00126 months <br />) | |
Opened: | Cameron Campbell 01:49 Sep 14, 2009 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Sep 14, 2009 |
45348 - 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 45348\u003C/a\u003E - \u003Ca href=\"/Peach_Bottom\" title=\"Peach Bottom\"\u003EPeach Bottom\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EManual Reactor Scram Due to Short Period During Plant Shutdown\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 45348 - Peach Bottom\n","link":"","lat":39.75920833333333,"lon":-76.26879444444444,"icon":"/w/images/b/be/Constellation_icon.png"}],"imageoverlays":null} | |
Unit 3 | |
---|---|
Reactor critical | Critical |
Scram | Yes, Manual Scram |
Before | Startup (0 %) |
After | Hot Shutdown (0 %) |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_45348&oldid=425657"