ML20044B182

Forwards Westinghouse Revised Proprietary RCS Flow Measurement Uncertainty Calculation Supplementing Setpoint Studies Submitted in Attachment to Util 900412 Ltr.Encl Withheld

ML20044B182
Person / Time
Site:	Callaway
Issue date:	07/09/1990
From:	Schnell D UNION ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML19298E287	List: ML20044B182
References
ULNRC-2244, NUDOCS 9007180048
Download: ML20044B182 (4)

Text

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IIVIONauty 9,1990 "" '***"

Eusenue Pr"" ^"*'

b U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station Pl-137 Washington, D. C. 20555 1

Gentlemen: ULNRC-2244 DOCKET NUMBER 50-483 CALLAWAY PLANT  ;

REACTOR COOLANT SYSTEM RTD BYPASS ELIMINATION '

References:

1. ULNRC-2196 dated 4-12-90

2. ULNRC-1227 dated 12-13-85 As requested at the Jun' 20, 1990 meeting between representativos of ABB/CE, UE, and NRC Staff members, the attachment provides a revised RCS flow measurement uncertainty calculation. This attachment supplements the setpoint studies submitted.in Attachment 6 of Reference 1 and contains proprietary Westinghouse calculational methodology.

The affidavit attached to Reference 2 requested the withholding of the Westinghouse setpoint methodology based on the following:

(i)- The information reveals the distinguishing aspects of a process (or component, structure, tool, method, etc.) where prevention of its use by any of Westinghouse's competitors without license from Westinghouse constitutes a competitive economic advantage over other companics.

(ii) Its use by a competitor would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing a similar product.

This affidavit, executed by a duly authorized upper level management official of Westinghouse, the owner of the information, establishes a rational basis, with specificity, by which the information indicated as being proprietary should be withheld from public disclosure in order to protect trade secrets and Westinghouse's competitive position. This information is held in 900718004s DR 900709 m ~

ADOCK 05000483 Og PDC

confidence by Westinghouse, was submitted to NRC in confidence in Reference =2,.and is not publicly available.

Thistsetpoint methodology is being used in this submittal in'a similar manner as it was used in Reference 2. In accordance with the regulations, proprietary and non-proprietary versions of this calculation are attached.

In addition, as indicated in the: June 20 meeting' handouts regarding T-Hot comparisons before and after this modification at Salem. Units 1 and 2, Union  !

E2.cctric? plans to compare post-modification calorimetric

data against the most recent pre-modification calorimetric data to assess the effects on T-Hot at I Callaway. Tho resulting comparison will be made available to the NRC Staff following restart from Refuel 4.

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,If you have any questions on the attachment ~

please contact us. >

Very truly yours, Donald F. Schnell s

GGY/sla Attachment t

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2 STATE OF MISSOURI )

) SS CITY OF ST. LOUIS )

Donald F. Schnell, of lawful age, being first duly sworn '

-upon oath says that he is Senior Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing document and-knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and  ;

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that the facts therein stated are true and correct to the best of his knowledge, information and belief.

By ' Donald F. Schnell '

Senior Vice President Nuclear SUBS 9pIBED and sworn to before me this k day Lof bron< , 1990.

F/ .

--nllh $

DARBAR . PFA NOTARY PUBUC, STATE Or MISSOURI MY COMMISSION EXPIRE $ APRll 22. 1993 ST. LOUIS COUNTY r

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- cci.' Gerald Charnoff, Esq.

Shaw, Pittman,;Potts & Trowbridge 2300 N.-Street, N.W.

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s Washington, D.C. 20037 Dr. J. O. Cermak CFA, Inc.

~4 Professional-Drive (Suite 110)

Gaithersburg, MD 20879 li R. C. Knop.

Chief, Reactor Project Branch 1 O' U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 1 Bruce Bartlett a :_ , Callaway Resident Office U.S. Nuclear Regulatory Commission RRM1 Steedman, Missouri 65077 Anthony.T. Gody, Jr. (2)

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 1 White Flint, North,_ Mail-Stop 13E21 11555 Rockville Pike' Rockville, MD- 20852 Manager, Electric Department Missouri Public' Service Commission P.O. Box 360 Jefferson City, MO 65102 l

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