ML19338D741

LER 80-068/03L-0:on 800823,during Mode 1,leak Was Discovered on B Charging pump,2P36B,discharge Header at Discharge Relief Valve Pipe.Apparent Cause Is Vibration Induced from Positive Displacement Pumps.Mods Made to All Three Pumps

ML19338D741
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/16/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19338D731	List: ML19338D730 ML19338D741
References
LER-80-068-03L, LER-80-68-3L, NUDOCS 8009230712
Download: ML19338D741 (1)

Text

C O U. S. NUCLE AR REGULATORY COMMISSION NRC FORM 366 (777)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUtRED INrORMATION) 3 o i 8

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HF,OM T D ATE I 8 60 61 ooc 8L ET NUM8ER EVENT DESCRIPTION AND PAOS ABLE CONSt OUENCES to o 2 During Mode 1 operation, a leak as discovered on the "B" Charging Pump, ,

[oTD 12P368. discharge header at a discharae relief valve oice to pumo discharge 1 10141llino ton 6pld. The "R" charging numn was isolated and the two remaining i o s Inumns romainad nporable. meeting the requirements of T.S.3.1.2.4. This I oa inccurrenca is similar to..LER's_50-368/80-061r 80-034,80-019 3& 79-031; I o i land is Reoortable..per T.S.6.9.1.9.d. I I

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JJ 34 JS 36 3) 40 et 42 43 44 er CAUSE OESCRiPTION AND CORRECnVE ACTIONS 27 i o iThe cause of failur a is believed to have been vibration induced from the ,

[IEJ loositive disolaceme, t Dumos. The pipe spool piece containing the defect i i 2 twas ronlacod- A ning sunnnrt was added to the branch line to reduce any I

[III] I vibrations induced moments. Modification was made to all three pumps. l

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NAME OF PREPARER Chris N. Shively , goy ,, MUWGB .

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