ML20033E438
| ML20033E438 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/01/1990 |
| From: | Wallace E TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19293A205 | List: |
| References | |
| NUDOCS 9003120776 | |
| Download: ML20033E438 (3) | |
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a TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENNESSEE 37401 5N 1578 Lookout Place MAR 011990 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 SEQUOYAH NUCLEAR PLANT (SQN) - EAGLE 21 UPGRADE TO SQN REACTOR PROTECTION SYSTEM (RPS)
Enclosed for the staff's review is the Westinghouse Electric Corporation's Topical Report, " Eagle 21 Microprocessor-Based Process. Protection System."
This report is provided in both proprietary (WCAP-12374) and nonproprietary (WCAP-12375) versions.
SQN wlil be upgrading the RPS of Units 1 and 2 during their respective Cycle 4 refueling outages by replacing the analog Foxboro H-Line hardware currently in use with the Westinghouse Eagle 21 digital system. Because the Eagle 21 topical report is generic in nature, it must be noted that the contact input
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nodules, discussed in Section 3.P.2, are not used in the SQN Eagle 21 i
application.
The upgrade at SQN will utilize the same technology as that used at Watts Bar Nuclear Plant (WBN) in support of their elimination of the WBN reactor coolant system resistance temperature detector bypass manifold.
The l
software and its verification and validation are broader in scope than WBN's I
because all of the SQN analog process racks are being replaced with digital equipment.
1 The design, verification, and validation plan provided as Appendix A of the Topical Report are the some plan used for the WBN application. As was done to the WBN application, organizational independence through the first and second l
1evel of Westinghouse management will be maintained for independence between design and veilfication and validation, future submittals will provide i
information on equipment qualification, software verification and validation, and postinstallation testing, Technical speclfication changes reflecting the Eagle 21 upgrade were submitted by a separate cover letter dated January 24. 1990.
Because the enclosure contains information proprietary to Westinghouse, it is supported by an affidavit signed by Westinghouse, the owner of the information.
The affidavit sets forth the basis on which the information may be withheld from public disclosure by the Commission and addressas with-specificity the considerations listed in paragraph (b)(4) of Section 2.790 of the Commission's regulations.
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PDC An Equal opportunity Employer
. MAR 01 M U.S. Nuclear Regulatory Commission Accordingly, it is respectfully requested that the information that is proprietary to Westinghouse be withheld from public disclosure in accordance with 10 CFR Section 2.790 of the Commission's regulations.
Correspondence with respect to the proprietary aspects of the Application for Withholding or the supporting Westinghouse Affidavit should reference CAW-89-101 and should be addressed to R. A. Wiesemann, Manager of Regulatory and Legislative Affairs, Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania 15230-0355.
Please direct questions concerning this issue to Russell R. Thompson at (615) 343-7470.
Very truly yours, TENNESSEE VALLEY AUTHORITY w
E. G. Wallace, Manager Nuclear Licensing and Regulatory Affairs Enclosure cc: Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Cc,mmission One White Flint. North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Con. !ssion Region 11 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379
ENCLOSURE WESTINGHOUSE ELECTRIC CORPORATION TOPICAL REPORT EAGLE 21 MICROPROCESSOR-BASED PROCESS PROTECTION SYSTEM Proprietary (WCAP 12374)
Nonproprietary (WCAP 12375)
(B25 890929 011)