ML19350C783

Responds to Treby 810309 Ltr Re Recommendation That Turbine Disks Be Ultrasonically Inspected.Util Does Not Object to Insp But Requests Flexibility If Order Issued.Related Correspondence

ML19350C783
Person / Time
Site:	North Anna
Issue date:	03/20/1981
From:	Christman J HUNTON & WILLIAMS
To:	Buck J, Quarles L, Rosenthal A Atomic Safety and Licensing Board Panel
References
ISSUANCES-OL, NUDOCS 8104060692
Download: ML19350C783 (2)

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Alan S. Rosenthal, Esquire f]A %'" ^ ? g ' 1887A Atomic Safety and Licensing Appeal k Board ,,

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Washing ton, D.C. 20555 / %:; u "O

Dr. John H. Buck Atomic Safety and Licensing Appeal

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U.S. Nuclear Regulatory Commission Washing ton, D.C. 20555 6%

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sf Dr. Lawrence R. Quarles MI Y Atomic Safety and Licensing Appeal Board i U.S. Nuclear Regulatary Commission l Washing ton, D.C. 20555 Virginia Electric and Power Company ,

(North Anna Power Station, Units 1 and 2)

. Docket Nos. 50-338 OL and 50-339 OL Turbine Missiles l

l Gentlemen:

Vepco has reviewed Mr. Treby's March 9, 1981, letter with the NRC Staff's recommendation thatythe North Anna 1 .. y turbine disks be ultrasonically inspected at-the next refueling outage. This letter is to advise you of Vepco's preliminary.

I views on the matter.

Vepec does not object to ultrasonically inspecting the North Anna 1 low-pressure rotors during the next refueling .

I outage, which is currently scheduled to begin in mid-1982. If you decide to issue an order to that effect, however, we think '

l it would be best to allow some flexibility by simply requiring ,

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HuxTox & WILLI.uts that thedisksbeinspectedafdehno=crethanaspecified number of hours of operation since the last inspection.

Refueling schedules can change according to a variety of circumstances, and it is conceivable that i: =ight becc=e advantageous to inspect either before or after the next refueling outage but still within the specified nt=her of operating hours. For the sa=e reason, and also because Vepco will be presenting = ore infor=ation on turbine disk cracking to you later this spring ce su==er, Vepco believes that it would be unwise to require at the present ti=e that inspections be perfor=ed at future refueling outages after the nex: cne. In any event, future inspection schedules should not be set in such a way as to prevent the use of curren: NRC-Staff guidelines, which =ay change so=ewhat as new data becc=e available.. _

Westinghouse is reviewing the NRC Staff's recc==endation and proposes to advise Vepco during the week of

. March 23 whether Westinghouse agrees with the Staff. Even allowing for a few days of unforeseen delay, I ought to be able to give you Westinghouse's views on the subject no later than Tuesday, March 31. A: the sa=e time I hope to give you Vepco's reco==endation for the maxi =u= nc=ber of operaring hours until the next inspection. If that schedule is not acceptable, please 1er me know.

Yours very truly, ~

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A4 q~k-(N" ames N. Chris= man w 126/586 cc: Stuar Treby, Esquire Anthony J. Ga=bardella, Esquire r.hief, Docketing.and Service Section -

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