ML18142A046

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Forwards Supplemental Proprietary & Nonproprietary Info Re VEP-FRD-41, VEPCO Reactor Sys Transient Analysis Using Retran Computer Code. Requests Comparison to Alternate Code Calculations Be Withheld (Ref 10CFR2.790)
ML18142A046
Person / Time
Site: Surry, North Anna, 05000000
Issue date: 08/24/1984
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To: Harold Denton, Eisenhut D
Office of Nuclear Reactor Regulation
Shared Package
ML18142A047 List:
References
376A, NUDOCS 8409060272
Download: ML18142A046 (2)


Text

e e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 W. L. STEWART VICE PRESIDENT NucLE..u< OPERATIONS August 24, 1984 Mr. Harold R. Denton, Director Serial No. 376A Office of Nuclear Reactor Regulation PSE/NAS:vdu Attn: Mr. D. G. Eisenhut, Director Docket Nos. : 50-280 Division of Licensing 50-281 U.S. Nuclear Regulatory Commission 50-338 Washington, D. C. 20555 50-339 License Nos.: DPR-32 DPR-37 NPF-4 NPF-7 Gentlemen:

. VEPCO REACTOR SYSTEM TRANSIENT ANALYSES Attachments 1 through 3 provide supplemental information related to our Topical Report VEP-FRD-41, 11 Vepco Reactor System Transient Analysis Using the RETRAN Computer Code 11 , transmitted by our letter to you of April 14, 1981, Serial No. 215. Mr. James L. Carter of the Division of Systems Integration informally provided us with a request for additional information which would be required to complete a review of VEP-FRD-41 by the NRC staff.

Portions of this requested information were provided in earlier submittals (Serial No. 060, dated February 27, 1984 and Serial Number 376, dated July 12, 1984).

Attachments 1 through 3 provide the balance of the requested information.

Specifically, Attachment 1 provides a description and qualification informa-tion for our RETRAN control system models. The results of comparisons of RETRAN calculations to calculations performed with LOFTRAN, a code developed by Westinghouse Electric Corporation, are provided in Attachments 2 (Proprietary) and 3 (Non-Proprietary).

As Attachment 2 contains information proprietary to Westinghouse Elec-tric Corporation, it is supported by an affidavit signed by Westinghouse, the owner of the information (see Attachment 4). The affidavit sets forth the basis on which the information may be withheld from public disclosure by the Commission and addresses with specificity the considerations listed in para-graph (b)(4) of Section 2.790 of the Commission s regulations.

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r 8409060272 840824 PDR ADOCK 05000280 P

e vrnoINIA ELECTRIC AND PowER CoMPANY To Mr. Haro 1d R. Denton Accordingly, it is respectfully requested that the information which is proprietary to Westinghouse be withheld from public disclosure in accordance with 10CFR Section 2.790 of the Commission s regulations. Correspondence with 1

respect to the proprietary aspects of the Application for Withholding or the supporting Westinghouse affidavit should reference CAW-84-58 and should be addressed to_R. A. Wiesemann, Manager, Regulatory and Legislative Affairs, Westinghouse Electric Corporation, P. 0. Box 355, Pittsburgh, PA 15230.

As we have discussed previously with your staff, we will be happy to meet at any time to discuss the Topical Report and our use of RETRAN in order to assist you in completing your review by your target date of January 15, 1985.

Very truly yours, W. L. Stewart Attachments cc: Mr. D. H. Moran Standardization and Special Projects Br,anch Mr. J. L. Carter Reactors Systems Branch Mr. James P. 0 Reilly 1

Regional Administrator Region II Mr. James R. Miller, Chief Operating Reactors Branch No. 3 Division of Licensing Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Mr. D.. J. Burke NRC Resident Inspector Surry Power Station Mr. M. W. Branch NRC Resident Inspector North Anna Power Station