ML20085G731

Addl Info Re AO BFAO-50-260/7425W.Inlet & Outlet Valves for Two of Three Cylinders Found in Satisfactory Condition. Remaining Cylinder Badly Pitted.Valves Refaced & Lapped in

ML20085G731
Person / Time
Site:	Browns Ferry
Issue date:	12/20/1974
From:	Eric Thomas TENNESSEE VALLEY AUTHORITY
To:	Case E US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20085G733	List: ML20085G731 ML20085G742
References
NUDOCS 8308290307
Download: ML20085G731 (2)

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FOLLOWUP REPORT FOR ABNORPAL OCCURRENCE REPORT BFAO-50-260/7425W BROWNS FERRY NUCLEAR PLANT UNIT 2 As stated in the Corrective Action section of Abnormal occurrence Report BFAO-50-260/7425W, the intake and discharge valves on standby liquid control pump 23 were inspected. The inlet and outlet valves for two of the three cylinders were found to be in satisfactory condition. Both inlet and outlet valves for the other cylinder vere found to be badly pitted. These valves were refaced and then lapped in. Upon completion of the inspection and repair, the SLC pu=p was retested and it operated satisfactorily. It is believed that foreign materici passed through the pump, damaging the inlet and outlet valves '

on one cylinder and prevented the pump frc: pumping its rated flow. The loss-of an inlet or outlet valve on the scr.e cylinder could reduce the 50-com rated capacity of the pump to a value below the 39 gpn required in the technical specifications. The pump inlet and outlet valve chenbers and the discharge j check valve were inspected for foreign material. Hone was found. Fcreign i r.aterial would nomily be washed through the lines to the test tank and drained out to a vaste drum.

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Mr. Edson G. Case ... . ,

Acting Director of Licensing Office of P.egulation \' E ' -

U.S. Atomic Enerce Co rission Uachington, DC 20545

Dear Fr. Case:

TFR!ESSEE VALLrf AUTHORITI - BRO'C3 FERRY I:UCLEAR PINIT U:IIT 2 -

DOCI:ET ::0. 50-260 - Ft.CILITY OPERATI: a LICr:SE DPR ASI;0R'IAL OCCJRRE'!CE REPORT EFAO-50-260/7425'.I AbnormalOccurrenceReport3FAO-50-260/7425Wcubmittedwith:/ letter of I!ovenber 22,197k, cade a cornittent to provide additional infor-nation when the cause of failure was deternined. The enclosed report fulfills thic cor.itncnt.

Very truly yours, TE'TESSEE VALLLY Nm:0RITf l..' ,

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-.3 E. F. Thontc Director of Power Froduction Enclosure CC (Enclosure):

Fr. IIor .an C.13:eley, Director Region II Rectlatory Operation: Office, USAEC 230 Peachtree Street, Iret. , suite 618 Atlanta, Geor6i a 30303

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