ML20141M270

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Advises That Check Valve CH-72 (Charging) Successfully flow- Tested Open in Mar 1992,as Followup to 891229 Request for Relief from Inservice Insp/Testing Program.Valve Operability Reviewed Using Guidelines in Generic Ltr 89-04
ML20141M270
Person / Time
Site: Maine Yankee
Issue date: 08/04/1992
From: Hebert J
Maine Yankee
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-89-04, GL-89-4, JRH-92-68, MN-92-80, NUDOCS 9208110002
Download: ML20141M270 (1)


Text

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. MaineYankee-HEUA8tf ELfCTROTY FOR MAINE Sif4CE 1972

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EDISON DRIVE AUGUSTA, MAINE 04LO + (207) 622 4868 August 4 1992 MN-92-80 -JRH-92-68

' UNITED STATES NUCLEAR REGULATORY COMMISSION

. Attention: ' Document Control Desk Washington _, DC. 20555

References:

(a) License No..DPR 36 (Docket No. 50-309)

-~(b).; MYAPCo Letter to USNRC dated December 29, 1989 (MN-89-156)

Subject:

_ Inservice Inspection Testing Program

.y Gentlemen:.

. . ._ .. Maine Yankee' submitted a-Relief Response-(V-6), Reference (b), of our Inservice Testing-(IST) program requiring. check-valve CH-72 (charging)-to be disassembled and 4 ' inspected every refueling; outage in' lieu of quarterly closure testing while at power. ~

LDuring the 1992: refueling' disassembly, the threaded bonnet became galled, preventing-removaldwithout. damage. The bonnet was tightened-and the-disassembly was cancelled because there was not a suitable replacement valve available.

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- Theivalve operability was- reviewed?using the guidelines from Generic Letter 04 for extending the dis, assembly / inspection frequency of'a check valve. CH-72 was q disassembled in 1990;- the~ measurements of the wear areas and clearances _were found zto.be within the manufacturers service tolerances. CH-72 was successfully full flow

tested open~in March 1992.--

-: Maine Yankee will be writing:a :" Cold Shutdown Justification" for inclusion-in the Lthird interval IST program. -Please' contact us_ should you;have any questions 1 _

regarding this matter.-

!Very_truly;yours, 29/9 Avh rn James--R. Hebert,-Acting Manager 3 1 Licensing &-Engineering Support Department t F J.VW/sjb L 'c: ~ iMr.1 Thomas'T. Martin' -

Mr. ; Charles ' S. = Marschall o :Mr. E..H.'Trottier Hr.LPatrick J. Dostie ik '920811000219'20804-PDR :ADOCK- 05000309 --- 0 pp PDR ,h O

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