ML20058K697

Notifies That Surveillance Test for Exercising Unit 2 Containment Vacuum Breaker Isolation Valve Showed to Be Inoperable & Would Not Close.Maint Work Initiated & Valve Was Returned to Operable Status

ML20058K697
Person / Time
Site:	Monticello
Issue date:	05/01/1975
From:	Tierney F NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9102130501
Download: ML20058K697 (1)

Text

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, N - O N T. M -E ft - ft, S Y A:Y E S - N 0.WE R. C O 84 P A M Y' .

. . . , i PRAIRIE ISLAND tiUCLEAR CCl*ERATING PLAttr oi ,

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\ Welch,. HN 55089 May 1, 1975 41, b .

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Mr. Jenoa-0. Keppler Direct 4r Region II.I. office.of toepection and Enforcassent '

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. US Noelear Regulatory Comandesinar .;-

7.99'R60sevelt Road '

CIen Ellyn, IL 60137 s  :

ATIN: Mr. N C Cheules

,, REPORP OF AhWORNAL CCCURREWCE NO. 75-12 At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on April 29, 1975, the surveillance test fer exercising Unit. 2 contatament vacuum Breaker. Isolation valve CW31628r showed the '

valve to be-inoperable in that it would-not close. -

• Maintenance vark was initiated and the valve vap returned to an operable status t,y 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> on April 29th.

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F P Tierney, Jr... 7 ,

Plant Manager Prairie Island Wcle.ar Plant I FPTtdn .

cet Directorate of Licensing.

ATIN: 3 C Buckley .

L 0 Mayer C H Neils ,

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