ML19208A096

LER 79-071/03L-0:on 790808,RHR Sys Pump 2D Vibrated at Level Higher than Allowable Limit During RHR Sys Operational Component Test.Caused by Spring Part Lodged in Vane of Impeller.Part Removed,Pump Inspected & Tested

ML19208A096
Person / Time
Site:	Brunswick
Issue date:	09/06/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19208A085	List: ML19208A084 ML19208A096
References
LER-79-071-03L, LER-79-71-3L, NUDOCS 7909120530
Download: ML19208A096 (2)

Text

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, LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMhTION) l0l1l Nl LICENSEE Cl B CODE ElPl2l@l0 0 l -l 0 lLICENSE 0 l 0 NUMSER l 0 l 0 l - l 0 l 0 l@l 4 l 1LICENSE l1l1 l 1 l@l$ 7 CAl T $8l@

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60 il 68 74 75 DATE 80 EVENT DESCRIPTION AND PROBABLE CONS'dQUENCES h O 2 lWhile performing PT 8.2.4. RHRSW Operational Component Test. DFRSW numn 2D had a l 0 a l vibration of 12.5 mils. The maximum allowable value is I ,3.6 mils.

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44 47 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS i

a IAn investigation of the pump revealed a part of a spring lodged in the vane of the i LLL'_J limpell er. This was removed, the pumn was insi,ected, tested, and returned to service. I i 2 IIt is believed that this partial spring came from a check valve disk assembly on the I i 3 l discharge of the nuclear and/or conventional service water pumps. In the pas i these I g l valves have sustained damage apparent 1v by reverse pressure from the other (CON'T) l 7 8 9 80 STA  % POWER OTHER STATUS DISCO RY DISCOVERY QESCRIPTION

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NAME OF PREPARER A. C. Tollison, Jr. PHONE:

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s LER CONTINUATION -- RO# 2-79-071 Facility: BSEP Unit No. 2 Event Date: 8-8-79 pumps when a pump is deenergized. The check valves were inspected during the 1979 refueling outage and several were found damaged and repaired. It is believed that this broken spring segment came from one of those valves. An Engineering Work Request has been written to correct this problem.

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