ML19345G157

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Ro:Msiv 3 Failed Upon Second Test Actuation.Valve Subsequently Tested Satisfactorily
ML19345G157
Person / Time
Site: Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date: 11/15/1974
From: Hartley F
CONNECTICUT YANKEE ATOMIC POWER CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CYH-2811, NUDOCS 8103090047
Download: ML19345G157 (1)


Text

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50-nts CONNECTICUT YANKEE ATOMIC POWER COMPANY HADDAM NECK PLANT

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RR #1. BOX 127E. EAST HAMPTON. CONN. 06424 J

November 15, 1974 CYH-2811

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r ames P. O'Reilly, Director

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Cirectorate of Regulatory Operations I._"j N0vt{ gg4 6-u

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U. S. Atomic Energy Commission

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631 Park Avenue k,,j.,

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Dear Mr. O'Reilly:

As defined by Technical Specifications for Connecticut Yankee Atomic Power Station Section 5.3, the following information involving an unsatisfactory test of one of four main steam isolation valves is hereby reported.

In accordance with Section 4.9 of the CY Technical Specification the Main Steam Isolation Valves are tested each week for a movement of approximately one and one-half inches. The #3 Main Steam Isolation Valve operated satisfactorily on its first test actuation however, when the second test actuations were made, it failed to operate.

The valve was tested subsequently and operated satisfactorily. The other three valves test operated satisfactorily.

A follow up report will be submitted in ten days.

Very truly yours,

. W. Hartley Plant Superintendent JHF/bn cc: D0L, Washington, D. C.

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