ML19210A212

Abnormal Occurrence 75-24:on 750716,river Water Pump Discharge Valve Failed Due to Low Valve Motor Winding Resistance & Winding Motor Overheating

ML19210A212
Person / Time
Site:	Three Mile Island
Issue date:	07/18/1975
From:	Colitz J METROPOLITAN EDISON CO.
To:
Shared Package
ML19210A208	List: ML19210A207 ML19210A212
References
NUDOCS 7910240928
Download: ML19210A212 (1)

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GH 6,.,~2 if ETROPOLITAN EDISON COMPANY sueswtARY OF GENERAUuBUC UnuHES CORPORA n0N POST OFFICE BOX 480 MIDDLETOWN.FENNSYLVANIA 17057 TELEPHONE 717-944-4cm July 18.1975 Mr. J.P. O'Reilly, Director Di ctorate of Regulatory Oparations '

gg 631 Park Avenue D

]h e King of Prussia, Pa. 19406 Operating License DPR-50 Docket 50-289

Subject:

Abnormal Occurrence No. A0 75-24

Dear Mr. O'Reilly:

This telegra:n is to confirm the telecon between Lee Spessard (Region I-DRO),

and J.J. Colitz (TMI Unit 1 Superintendent) at 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br />, July 17, 1975.

The following report is submitted in accordance with paragraph 6.7.2.a.4

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(page 6-11) of the Technical Specifications.

On July 16, 1975, while returning the Nuclear Services River &!ater Pump B (NR-P-4B) to service follcwing routine proventive maintenance, the pins discharge valve (NR-V-13) failed to open when the pe:np was started. Sub-scquent investigation revealed that the valve motor winding resistance to grcund was icw and evidence of motor winding overheating was present. The motor en the valve operator was replaced and the valve was successfully tested.

The cause of the motor failure is being investigated.

Very truly yours, fh.

G.J. Coli

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Ifnit 1 Superintendent JJC/ dun 1476 229

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