ENS 43996

From kanterella

Jump to navigation Jump to search

v t e ENS Event
20:05 Feb 20, 2008
Title	Rhr Service Water System Declared Inoperable Due to Inability to Meet Fsar Requirement
Event Description	At 1505 EST, it was determined by an engineering analysis that a leak on a 3/4 inch vent line of the Residual Heat Removal Service Water (RHRSW) System common discharge line would prevent continuous operation of the system for 30 days as required by the Unit 2 FSAR. Specifically, if the line were to completely shear, the resulting leak would have exceeded the capacity of the building sumps and over a prolonged period of operation would have resulted in the excessive water levels in the Reactor Building Torus room area. In order to mitigate the condition, supplemental pumping capacity would be needed in the building sumps or the RHRSW system would have to be temporarily secured. The RHRSW system has been tagged out for repair of the line. The appropriate 8-hour RAS in Tech Spec has been entered. The line will be repaired and the system returned to service. The licensee identified the crack in the socket weld during a system walkdown and anticipates completion of repairs in approximately 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. The licensee informed the NRC Resident Inspector. * * UPDATE AT 2140 EST ON 02/20/08 FROM BILL DUVALL TO S. SANDIN * * * At 2120 EST on 02/20/08 the RHR SW System was declared OPERABLE after completion of repairs and testing. The failure of the socket weld at 2E11-FV001 is preliminarily attributed to fatigue cracking caused by vibration. A root cause investigation is ongoing. A system walkdown did not identify any additional deficiencies. The licensee informed the NRC Resident Inspector. Notified R2DO(Robert Haag).

ENS 43996 +/-
Where
Hatch Georgia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Time - Person (Reporting Time:+-3.58 h-0.149 days <br />-0.0213 weeks <br />-0.0049 months <br />)
Opened:	Tony Spring 16:30 Feb 20, 2008
NRC Officer:	Steve Sandin
Last Updated:	Feb 20, 2008
43996 - 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 43996\u003C/a\u003E - \u003Ca href=\"/Hatch\" title=\"Hatch\"\u003EHatch\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ERhr Service Water System Declared Inoperable Due to Inability to Meet Fsar Requirement\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 43996 - Hatch\n","link":"","lat":31.93298888888889,"lon":-82.34381666666667,"icon":"/w/images/1/14/Southern_Nuclear_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Hatch with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
WEEKMONTHYEAR2008-02-20T20:05:00 [Table view]
[ENS list for Hatch]

Retrieved from "https://kanterella.com/w/index.php?title=ENS_43996&oldid=426539"