ENS 41330: Difference between revisions

v t e ENS Event
14:49 Jan 13, 2005
Title	Entry Into Technical Specification Required Shut Down Due to Loss of Essential Bus
Event Description	The following information was provided by the licensee via facsimile: At 0849 hours0.00983 days <br />0.236 hours <br />0.0014 weeks <br />3.230445e-4 months <br /> on January 13, 2005, during testing of Essential Bus D1 (Undervoltage Units monthly functional test) [the] Potential Transformer secondary fuse blew. This caused an Essential 4160 VAC Bus D1 undervoltage condition. Emergency Diesel Generator #2 auto started due to the undervoltage condition on Essential Bus D1. This auto start of EDG #2 is reportable IAW [in accordance with] 10CFR50.72(b)(3)(iv)(a). [The licensee entered] into Technical Specification 3.0.3 with a loss of Essential 4160 VAC Bus D1 [with] plant shutdown required within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> if the Essential Bus and DC battery chargers 2P and 2N are not restored. At 0949 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.610945e-4 months <br />, [the licensee] commenced plant shutdown to comply with Technical Specification 3.0.3. The initiation of the plant shutdown is reportable IAW 10CFR50.72(b)(2)(i). [At] 1049 hours0.0121 days <br />0.291 hours <br />0.00173 weeks <br />3.991445e-4 months <br />, [the license] re-energized Essential 4160 VAC Bus D1 and verified battery chargers 2P and 2N energized. [At]1051 hours, [the licensee] exited Technical Specification 3.0.3 and stopped plant shutdown. [The licensee also noted that] at 0855 hours0.0099 days <br />0.238 hours <br />0.00141 weeks <br />3.253275e-4 months <br />, EDG #2 was shutdown when the #2 Service Water pump did not start. [At] 1144 hours0.0132 days <br />0.318 hours <br />0.00189 weeks <br />4.35292e-4 months <br />, Service Water Pump #2 [was started and the licensee] declared Service Water Loop 2 OPERABLE. The license has notified the NRC Resident Inspector, will notify local government agencies, and expects to make a press release.

ENS 41330 +/-
Where
Davis Besse Ohio (NRC Region 3)
Reporting

10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown 10 CFR 50.72(b)(3)(iv)(A), System Actuation
LER:	05000346/LER-2005-001
Time - Person (Reporting Time:+-1.28 h-0.0533 days <br />-0.00762 weeks <br />-0.00175 months <br />)
Opened:	Anthony Stallard 13:32 Jan 13, 2005
NRC Officer:	Bill Huffman
Last Updated:	Jan 13, 2005
41330 - 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 41330\u003C/a\u003E - \u003Ca href=\"/Davis_Besse\" title=\"Davis Besse\"\u003EDavis Besse\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EEntry Into Technical Specification Required Shut Down Due to Loss of Essential Bus\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 41330 - Davis Besse\n","link":"","lat":41.59545,"lon":-83.08950833333333,"icon":"/w/images/7/78/Cleveland_Electric_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Davis Besse with 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown
WEEKMONTHYEAR2022-02-05T20:14:00 [Table view]
[ENS list for Davis Besse]

@@ Line 16: / Line 16: @@
 | event date = 01/13/2005 09:49 EST
 | last update date = 01/13/2005
-| title = Entry Into Technical Specification Required Shut Down Due To Loss Of Essential Bus
+| title = Entry Into Technical Specification Required Shut Down Due to Loss of Essential Bus
 | event text = The following information was provided by the licensee via facsimile:
 At 0849 hours on January 13, 2005, during testing of Essential Bus D1 (Undervoltage Units monthly functional test) [the] Potential Transformer secondary fuse blew.  This caused an Essential 4160 VAC Bus D1 undervoltage condition.  Emergency Diesel Generator #2 auto started due to the undervoltage condition on Essential Bus D1.  This auto start of EDG #2 is reportable IAW [in accordance with] 10CFR50.72(b)(3)(iv)(a).

v t e Unit 1
B&W-R-LP
Reactor critical	Critical
Scram	No
Before	Power Operation (100 %)
After	Power Operation (95 %)

ENS 41330: Difference between revisions

Latest revision as of 21:21, 1 March 2018

Navigation menu

ENS 41330: Difference between revisions

Latest revision as of 21:21, 1 March 2018

Navigation menu

Search