ML20148M532

Forwards Proprietary Documentation,Addressing Detailed Issues Relevant to FROSSTEY-2.Encl Withheld

ML20148M532
Person / Time
Site:	Maine Yankee
Issue date:	06/17/1997
From:	Hebert J Maine Yankee
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML19317C417	List: ML20148M532
References
JRH-97-149, MN-97-70, NUDOCS 9706250012
Download: ML20148M532 (5)

Text

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MaineYankee RELIABLE ELECTRICITY SINCE 1972 329 BATH RoAo + BRUNSWICK, MAINE 04011 * (207) 798-4100 June 17,1997 MN-97-70 JRH-97-149 UNITED STATES NUCLEAR REGULATORY COMMISSION Attention: Document Control Desk Washington, DC 20555

References:

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

(b) Letter, CD Frizzle (Maine Yankee) to WT Russell (USNRC), " Submittal of Maine Yankee SBLOCA Licensing Analysis in Compliance with 10 CFR 50.46 and in Satisfaction of TMI Action items ll.K.3.30, ll.K.3.31, and ll.K.3.5", MN-96-056, April 25,1996.

(c) Letter, USNRC to Maine Yankee, " Request for Additional Information - ANF 4

RELAP SBLOCA Analysis", June 25,1996.

(d) Telephone conversation between USNRC, Maine Yankee, and Yankee Atomic, November 22,1996.

(e) Letter, JR Hebert (Maine Yankee) to USNRC, " Maine Yankee SBLOCA Analysis: Response to USNRC Request for Additional information and  ;

Request for Supplemental Information", MN-97-19, March 10,1997.

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Subject:

Supplemental Information on the FROSSTEY-2 Code Uncertainty Gentlemen:

In April,1996, Maine Yankee submitted a Small Break Loss Of Coolant Accident (SBLOCA) analysis as a replacement to the existing SBLOCA licensing analysis, Reference (b). Within that Ijf submittal, we included a description of the FROSSTEY-2 code and its usage as relevant to the proposed SBLOCA transient analysis. Subsequent USNRC questions, References (c) and (d), and

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Maine Yankee responses , Reference (e), address more detailed issues relevant to FROSSTEY-2.

A follow up telephone conversation between the USNRC, Maine Yankee, Yankee Atomic, and O) the USNRC consultant (Pacific Northwest Laboratories) was held on May 13,1997 to discuss additional questions relating to the FROSSTEY-2 code uncertainties. At that time, Maine Yankee agreed that the response to those questions would be documented.

The attached response provides that documentation. This response is considered proprietary to the Maine Yankee vendor performing the work. Therefore, contained as Attachment 1 to this

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MaineYankee 1- 1 MN-97-70 )

letter is an affidavit executed by the Yankee Atomic Electric Company in support of withholding this

. Information from public disclosure. Attachment 2 documents the answers provided to the USNRC l verbally on May 13,1997.

i-Very truly yours, ames R. Hebert, Manager Regulatory Affairs a

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! c: Mr. H. J. Miller  !

,- Mr. J. T. Yerokun Mr. D. H. Dorman

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Dr. C. Beyer (PNL) s c: w/o attachments -j i Mr. U. Vanags  !

Mr. P. J. Dostle 1

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W i; ATTACHMENT 1 4

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YANKEE ATOMIC ELECTRIC COMPANY PROPR.lETARY AFFIDAVIT 1

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I AFFIDAVIT PURSUANT s

TO 10CFR2.790 Yankee Atomic Electric Company ) i i Nuclear Services Division )

Commonwealth of Massachusetts - )

Worcester County ) SS:

I, S. P. Schultz, depose and say that I am the Vice President of Yankee Atomic Electric )

Company, duly authorized to make this afildavit, and have reviewed or caused to have reviewed

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the information which is identifled as proprietary. I am submitting this af11 davit in accordance

, with the provisions of 10CFR2.790 of the Commission's reguladons for withholding this information.

'1he information for which proprietary treatment is sought is the response contained in the l proprietary enclosure to Maine Yankee letter MN 97-70, Maine Yankee Atomic Power Company -  ;

to U. S. Nuclear Regulatory Commission.  :

I Pursuant to the provisions of Paragraph (b)(4) of Section 2.790 of the Commission's l regulations, the following is furnished for consideration by the Commission in determining whether the information sought to be withheld from public disclosure, included in the referenced document, should be withheld. I i

1. The material contained in this transmittal was obtained at considerable expense {

to Yankee Atomic Electric Company and Maine Yankee Atomic Power Company and )

the release of which would seriously affect our competitive position.

2. The material contained in this transmittal is of the type customarily held in  !

confldence and not customarily disclosed to the public. I

3. This information is being transmitted to the Commission in confidence under the I provisions of 10CFR2.790 with the understanding that it is to be received in confidence by the Commission, l

4. This information is for Commission internal use only and should not be released i to persons or organizations outside the Directorate of Regulation and the ACRS without prior approval of Yankee Atomic Electric Company. Should it become necessary to release this information to such persons as part of the review procedure, please contact Yankee Atomic Electric Company. >

Further deponent sayeth not.

Sworn to before me this 23th day of May,1997 _

S. P. Schultz 3 um.

cdb Notary Public 0 '

My Ccanission Expires: 1/1/04

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MN-97-70 l

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ATTACHMENT 2 l

l RESPONSE TO USNRC QUESTIONS ON FROSSTEY-2 UNCERTAINTIES (PROPRIETARY) l NRC32