ML18113A774

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Responds to NRC 781204 Ltr Re Topical Rept VEP-FRD-23.May Wish to Lower Priority of Review.Requested References 9 & 12 of Rept Contain Proprietary Matl Received from Westinghouse
ML18113A774
Person / Time
Site: Surry, North Anna, 05000000
Issue date: 12/28/1978
From: Thomas W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To: Harold Denton, Schwencer A
Office of Nuclear Reactor Regulation
References
NUDOCS 7901150136
Download: ML18113A774 (1)


Text

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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND,V:IRGINIA 23261 December 28, 1978

  • Hr. H. R. Denton, Director Serial No. : . 532A Office of Nuclear Reactor Regulation FR/RWC: mvc Attn: Mr. Albert Schwencer, Chief Docket Nos.: 50-280 Operating Reactors Branch No. 1 50-281 Division of Reactor Licensing 50-338 U. S. Nuclear Regulatory Commission 50-339 Washington, D.C. 20555 License Nos.: DPR-32 DPR-37 Dear Mr. Denton; NPF-4 TOPICAL REPORT.ON VEPCO THER11AL HYDRAULIC MODEL In the.A. Schwence:r (NRC) to W. L. Proffitt (Vepco) letter dated December 4, 1978, several aspects of the Nuclear Regulatory Commission (NRG) review of the Vepco Topical Report VEP-FRD-23, "Reactor Core Thermal Hydraulic Analysis Model Using LYNX 1 and LY~ 2 Computer Codes" were addressed. Con-cerning topical report review fees, Vepco is aware that a fee will be ch~rged for the NRC review of VEP-FRD-23. However, we would anticipate that the NRC review effort would be minimized by the fact that the LYNX *computer codes will already have been reviewed and only our application of these codes to the Surry and North A...,na units remains to be reviewed.

Your indicated review of VEP-FRD-23, tentatively scheduled for com-pletion in the* second quarter of 1979, is compatible with our internal planning.

However, it shoul~ be noted that we will be providing additional topical reports in the core therinal-hydraulic area during the second* quarter.of 1979, and as a result, we may wish to lower the prio.rity on the review of VEP-FRD-23. In this event, we will formally advise you.

In addition, your letter requested References 9 and 12 of topical*

report VEP-FPJ)-23.* Both references contain proprietary material received from Westinghouse Electric Corporation. Reference 9 provides fuel assembly pressure drop data specifically for*Surry Units No. 1 and 2. Pages 3-2 and 3-3 of VEP-FRD-23 explain the methodology and equations in which the specific values indicated in Reference 9 are used. Reference 12 provides relative power infor-mation adapted for use in Vepco analyses. Pages 4-3, 4-5 and 4-6 of VEP-FRD-23 provide further information on the use of the specific values provided in Reference 12. It is believed that a review*of the portions of the text indi-cated above will provide sufficient information to complete your review .*

Should you require more information, we would like to meet with you at your earliest convenience.

Ver; ~ru.ly yours,/

  • 4 /_?) ~/;)£ -_,

W. N. Thomas 7C/Ot/5013, Vice President cc: Hr. James P. O'Reilly Fuel Resources