ENS 53663: Difference between revisions

v t e ENS Event
04:00 Oct 11, 2018
Title	Air Start Solenoid Closure Failure
Event Description	During a post maintenance start of the 1B diesel generator, the air start solenoid valves did not close as expected. This resulted in lowering air pressure in the common air start headers causing inoperability of the 2A and 2B diesel generators at time 23:03. The 1B diesel generator was isolated from the common air start header, which restored the air start header pressure to the 2A and 2B diesel generators. The 2A and 2B diesel generators were declared operable at 23:34. The NRC Resident Inspector was notified.

ENS 53663 +/-
Where
Calvert Cliffs Maryland (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Time - Person (Reporting Time:+23.97 h0.999 days <br />0.143 weeks <br />0.0328 months <br />)
Opened:	Kevin Dougherty 03:58 Oct 12, 2018
NRC Officer:	Karen Cotton
Last Updated:	Oct 12, 2018
53663 - 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 53663\u003C/a\u003E - \u003Ca href=\"/Calvert_Cliffs\" title=\"Calvert Cliffs\"\u003ECalvert Cliffs\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EAir Start Solenoid Closure Failure\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 53663 - Calvert Cliffs\n","link":"","lat":38.434263888888886,"lon":-76.44219722222222,"icon":"/w/images/b/be/Constellation_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Calvert Cliffs with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
WEEKMONTHYEAR2018-07-07T04:00:00 [Table view]
[ENS list for Calvert Cliffs]

@@ Line 19: / Line 19: @@
 | event text = During a post maintenance start of the 1B diesel generator, the air start solenoid valves did not close as expected.  This resulted in lowering air pressure in the common air start headers causing inoperability of the 2A and 2B diesel generators at time 23:03.  The 1B diesel generator was isolated from the common air start header, which restored the air start header pressure to the 2A and 2B diesel generators.  The 2A and 2B diesel generators were declared operable at 23:34.
 The NRC Resident Inspector was notified.
-| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181012en.html#en53663
+| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181015en.html#en53663
 }}{{unit info
 | Unit =  2

Revision as of 07:30, 15 October 2018