ML19262A195

Abnormal Occurrence 74-33:on 741230,while Conducting Pretest Valve lineup,1A Decay Heat Pump Suction Valve from Borated Water Storage Tank Failed to Close.Caused by Circuit Breaker Tripping on Overcurrent.Motor Circuit Breaker Reset

ML19262A195
Person / Time
Site:	Three Mile Island
Issue date:	12/31/1974
From:	Herbein J METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910260529
Download: ML19262A195 (2)

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T'l! X ' R P T CT,E F R O.*.' : Metropolitan Edison Co DATE OF CCC D ATE R EC'D 'LTR Lebaron, Pa 12-31 74 1-6-75 XX J G Herbein y;.:

ORIG CC OTHERi SENT mEC ?C R TO: XX none signec l SENT LCCAL POR Mr O'Reilly PROP !?;:0 INPUT NO CY5 REC'D COCKET .:0: .

CLASS UT:CLA35 XXXXXX 1 50-289 ENCLC5URES:

DESCR.? tic:.

Ltr re Abnormal Occurrence #74-33 on 12-30 concerning the failure of a heat p'2mp suction valve..... .

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• OFFICE Box ' den LE9ANCN,PEMraVLVANfA 1704:

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TELrM*ONS 711 - Tr1 %4I December 31, 1974 Mr. J.P. O'Reilly, Director Directorate of Regulator /

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631 Park Avenue - UU \ Sdr/MO King of Prussia, Pa. U\J6tlL, 19406

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- Operating License DPR-50 Docket 50-2U9

Subject:

Almormal Occurrence ifo A0 74-33

Dear Mr. O'Reilly:

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This telegram is to confirm a conversation between Mr. Bert Davis (Ronion I-04))

and J.G. Herboin (TMI-Station Superintendent) at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> 30 December 1974.

6-11) of the technical specifications.The following report is submitted in a On 30 Dececher, while conducting a pretest valve line up in preparation for hig and low pressure injection surveillance testing, tha 1A decay heat pur.p suction valve (Gt-VSA) frocr the Dorated liater Storage Tank failed to close.

The votor circuit breaker for valve D:t-VSA was resnt and the valve was succ openad and closed using tha recota push button operator in the control roum.

Valve al-V5B was also opened and closnd successfully.

The bish and low pressure injection sunreillance test was resumed and comploted satisfactorily.

Investigation into the cause of the DH-VSA valva cotar circuit breaker trip indicated the circuit breaker trippsd on over current when the valve r,ator was started in the close directica.

by v41ve ricatica. sters binoing within the valve packing due to lack Lubriccat cycled eight was applied to the valve stem and the CH-VGA valve was successfully tic.as.

213 A

. . . . . J.G. He

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