ML19344D643

Forwards Jm Schmerling 800320 Affidavit & Five Other Documents Re Technical Info on Turbine Disc Cracking in Response to Aslab 800303 Memorandum & Order.Vepco Revised Written Testimony May Be Ready in mid-Oct.W/o Encl

ML19344D643
Person / Time
Site:	North Anna
Issue date:	03/24/1980
From:	Christman J HUNTON & WILLIAMS
To:	Buck J, Mike Farrar, Rosenthal A NRC ATOMIC SAFETY & LICENSING APPEAL PANEL (ASLAP)
References
NUDOCS 8004250381
Download: ML19344D643 (3)

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HuxTox & WILLIAMS 707 East MAIN STREET P. O. Box 1535 Ricnwowns.VanonNIA 20e12 WSMINGTON. D.C. Orriez 1989 PENNSYLVANIA Avt. N W 20036 Tc L c PMo N E 804 788*S200 P.o . Box 19230 CAntt HuNTwANo Tc6cpwonc zoa ras.seso Nourot.s.VamorwsA Orrscs ,

SusTE 1301 FiRsT VIRGINIA sANM TOWER 401 ST. PAUL's DouLEVARD 23510 TELtpwont God 625 5501 entNo.V-8-50-20-29-23 March 24, 1980 oiater o AL No .oA re. 8368 Alan S. Rosenthal, Esquire Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dr. John H. Buck Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Michael C. Farrar, Esquire Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Washington, D.C. 20555  :

In the Matter of Virginia Electric and Power Company (North Anna Nuclear Power Station, Units 1 and 2)

Decket Nos. 50-338 OL and 50-339 OL Gentlemen:

Enclosed are the following documents:

(1) Affidavit of Jerome M. Schmerling, dated March 20, 1980; (2) Application for Withholding Proprietary Infor-mation from Public Disclosure; (3) Affidavit of Robert B. Williamson, in support of the Application for Withholding; 80043503h

, HUNTON 8e WILLIAMS Alan S. Rosenthal, Esq.

Dr. John H. Buck Michael C. Farrar, Esq.

March 24, 1980 Page Two >

(4) Nonproprietary version of the March 20, 1980, f Affidavit of Jerome M. Schmerling, with pro-prietary information deleted; (5) Executed Affidavit of Jerome M. Schmerling, dated February 18, 1980; and (6) Vepco letter of March 19, 1980, to Darrell J.

Eisenhut of the NRC containing information about turbine disc cracking.

The March 20 affidavit of Mr. Schmerling contains the technical information on turbine disc cracking that you called for in your Memorandum and Order of March 3, 1980. You will see that the March 20 affidavit, the earlier Schmerling affidavit of February 18, and Appendix A to Attachment 3 to the letter to Mr. Eisenhut contain Westinghouse proprietary information, and I should therefore like to ask you to treat those documents in accordance with the procedures that have been used heretofore to protect such information from disclosure.

A caveat about the latest (March 20) Schmerling affidavit:

Mr. Schmerling included as attachments to that affidavit up-dated tables of calculated crack sizes. Westinghouse advised by phone today, however, that those updated tables need further revision, and so I have not enclosed them. Vepco believes that the calculated crack sizes in the tables in Appendix A to At-tachment 3 to the letter to Mr. Eisenhut are correct. It may i be that the figure of 28,260 hours0.00301 days <br />0.0722 hours <br />4.298942e-4 weeks <br />9.893e-5 months <br /> in the last sentence of Mr. Schmerling s affidavit will also have to be revised; as you can see from page 6 of Attachment 3 to the letter to Mr.  !

Eisenhut, Vepco calculates that the worst-case disc could op-erate a total of about 40,400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> (as compared to the actual '

17,452 hours0.00523 days <br />0.126 hours <br />7.473545e-4 weeks <br />1.71986e-4 months <br /> as of December 1, 1980) before the maximum ex-pected crack would reach critical size. Finally, I'm not en-tirely sure the letters a, c, g, and h used to code the Westing-house proprietary information (you will see these letters as exponents outside the brackets that enclose proprietary data) are correct in the March 20 Schmerling affidavit. As you can see from Appendix B to Attachment 3 to the letter to Mr.

Eisenhut, Vepco used the letters b, c, and e. I will try to ,

straighten these matters out and let you know the outcome.

I l

HUNTON & WILLI AMS Alan S. Rosenthal, Esq.

Dr. John H. Buck Michael C. Farrar, Esq.

March 24, 1980 Page Three You also asked to know when Vepco will be able to update its testimony on turbine missiles. Westinghouse in-forms me that the Westinghouse <3ortion of the analysis (Pi and missile energy) is expected to ae complete by the end of July 1980. Stone & Webster advise that they will then need about six weeks more to perform the P2 and P3 calculations and report the results. It's difficult to say, without having seen those analyses, how much additional time it will then take to incor-porate the analyses into written testimony, but I would antici-pate asking for an additional four weeks for that purpose. In short, my best estimate of when revised written testimony could be ready is mid-October.

urs very truly,

= eto. h h % %

Mba_mesN. Christman 126/586 Enclosures cc: Daniel T. Swanson, Esq.

Richard M. Foster, Esq. (without enclosures)

Anthony J. Gambardella, Esq. (without enclosures) .

Chief, Docketing and Service Section (without enclosures)