ML19329B094

Interim Deficiency Rept Re MU-HV66B Reactor Coolant Pump Seal Injection Isolation Valve.Valve Disassembled & Actuator Removed.Final Rept to Be Forwarded 761119

ML19329B094
Person / Time
Site:	Davis Besse
Issue date:	10/25/1976
From:	Roe L TOLEDO EDISON CO.
To:
Shared Package
ML19329B081	List: ML19329B083 ML19329B089 ML19329B094 ML19329B095 ML19329B096 ML19329B097
References
133, NUDOCS 8001300680
Download: ML19329B094 (2)

Text

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D~~ Tou[co EDEGi\1 LOWELL E. ROE

w. pr .at Serial No. 133 #

Facehtes Devescoment (4195 253 5242 October 25, 1976 t

Docket No. 50-346

. o Mr. James G. Keppler

' Regional Director, Region III

.- Directorate of Regulatory Operations .

U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

This Iceter is submitted in accordance with 10CFR 50.55(c) as an interim '

]oolantpumpsealinjectionisolationvalveMUHV66Breport -

i reactor regarding the Da potential defi-v liency, which was reported by telephone conversation between our Mr. C.

Domeck and your Mr. T. Vandel on September 20, 1976.

Description of the Deficiency Seal injection isolation valve Tag No. HU-HV66B for No. 1-2-2 reactor coolant pump is a 1 " Velan globe valve with a Kielcy & Kueller In-corporated assist double to close acting air cylinder operator with internal spring the valve.

14 of the FSAR. This valve is shown on Figurc 9-21, Revision  !

The valve in question was supplied by Babcock & Wilcox, is external to the containmant ctop check valve. vessel penetration and is in series with a locked open ,

i During containment vessel integrated leak rate tests, checks indicated that containment through this valve.vessel test pressurization air was leaking backwards -

100 psig control air was connected to the valve cperator to stroke the valva closed and as the air pressure in the cylinder began to build-up, the valve yoke failed.

)

The valve to bcproper has beencondition disassembled, and with the actuator removed,

[ -#*und  ;

in satisfactory and operates freely. It is sus-

\s-_alve and valve actuator assembly' ted that there might have been t

i y:ke is broken, this cannot be verified atAs the on-site operator assembly this time; however, before

breakage, and during in-place valve calibration testing, the actuator c;sembly stroked-the valve with no problem. / .

THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MA@tR6r#1/iw4pfS 8001300

• f i

e When if required. the new yoke is installed, alignment will be checked and corrected",

The new yoke is on-site and will be installed shortly. A final definitive report of the deficiency, analysis of the safety implications and the corrective action taken will be submitted to your office in accordance

.~. with 10CFR 50.55(e) upon completion of the repair and completion of our review.

This should be approximately November 19, 1976.

Yours very truly, '

gr v/ h pc/29/28-29 cc:

Dr. Ernst Volgenau, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washinhton,D.C. 20555 '

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