ML20211K771

Application for Amends to Licenses NPF-9 & NPF-17,modifying Steam Generator Tube Plugging Criteria to Allow Evaluations of Degraded Tubes to Be Performed within Tubesheet.Fee Paid

ML20211K771
Person / Time
Site:	Mcguire, McGuire
Issue date:	06/24/1986
From:	Tucker H DUKE POWER CO.
To:	Harold Denton, Youngblood B Office of Nuclear Reactor Regulation
Shared Package
ML19292F492	List: ML20211K771 ML20211K779 ML20211K784
References
TAC-61775, TAC-61776, NUDOCS 8606300255
Download: ML20211K771 (5)

Text

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e DUKE POWER GOMPANY P.O. BOX 33189

• CHARLOTTE, N.C. 28242 HAL BITUCKER Tux.zenoxe m.....- noy amaan mm. .-

June 24, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulatic.1 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 ATTENTION: Mr. B.J. Youngblood, Director PWR Directorate No. 4

Subject:

McGuire Nuclear Station, Units 1 and 2 Docket No. 50-369, 50-370 Steam Generator Tube Plugging Criteria

Dear Mr. Denton:

Attached are proposed License Amendments to Facility Operating Licenses NPF-9 and NPF-17 for McGuire Nuclear Station Units 1 and 2, respectively. The proposed changes seek to modify the steam generator tube plugging criteria for the tubesheet region of the steam generators. The proposal would allow an evaluation to be performed for degraded tubes within the tubesheet to determine the need for corrective actions, thus preventing the unnecessary plugging of steam generator tubes with the accompanying impacts of reducing RCS flow and increasing personnel exposure.

Attachment I contains the proposed Technical Specification changes; Attachment 2 contains the Justification and Safety Analysis in support of the proposed changes; Attachment 3 contains the Westinghouse Report "McGuire Units 1 and 2 Tubesheet Region Plugging Criterion", proprietary and non-proprietary versions; Attachment 4 provides a determination that the proposed changes would not involve any significant hazards consideration as defined by 10 CFR 50.92.

As Attachment 3 contains information proprietary to Westinghouse Electric Corporation, 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 addresses with specificity the considerations listed in paragraph (b)(4) of Section 2.790 of the Commission's regulations.

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Mr. Harold R. Denton June 24, 1986 Page 2 ,

Accordingly, it is respectfully requested that the information which 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-85-035 and should be addressed to R.A. Wiesemann, Manager, Regulatory and Legislative Affairs, Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania 15230.

Due to the unexpected number of indications in the tubesheet region, Duke was unaware that this amendment would be necessary to avoid a delayed start-up from the current refueling outage. On this basis, Duke Power requests exigent review and approval in accordance with 10 CFR 50.91(a)(6) with approval by July 21, 1986. Attachment 5 contains the basis for meeting the criteria for an exigent license amendment.

This revised steam generator plugging criteria has been a matter of dis-cussion between the industry and the NRC for some time. South Carolina Electric and Gas submitted a proposal dated January 16, 1986 to incorporate the criteria into the specifications for V.C. Summer. The NRC staff has been pursuing this issue on a generic basis and per discussions between our respective staffs, we understand that the technical review process is es-sentially complete. We have included several conservatisms in our proposal (specifically, the P* distance and the definition of intact tube) to facil-itate review and approval. Duke Power may choose to propose different, less conservative values at a later date.

Pursuant to 10 CFR 170.21, please find enclosed a check in the amount of

$150.00.

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Please feel free to contact us if you require any additional information.

l Very truly yours, G 4 /$ V s Hal B. Tucker JBD/37/j gm Attachments -

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Mr. Harold R. Denton June 24, 1986 Page 3 -

xc: Dr. J. Nelson Grace Mr. Dayne Brown, Chief Regional Administrator Radiation Protection Branch U.S. Nuclear Regulatory Commission Division of Facility Services Region II Dept. of Human Resources 101 Marietta Street, NW, Suite 2900 P.O. Box 12200 Atlanta, Georgia 30323 Raleigh, N.C. 27605 Mr. W.T. Orders Mr. Darl Hood, Project Manager NRC Resident Inspector Division of Licensing McGuire Nuclear Station Office of NRC Washington, D.C. 20555 a

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Mr. Harold R. Denton, Director June 24, 1986 Page 4 l

HAL B. TUCKER, being duly sworn, states that he is Vice President of Duke .

Power Company; that he is authorized on the part of said Compar.y to sign and file with the Nuclear Regulatory Conanission this revision to the McGuire Nuclear Station License Nos. NPF-9 and NPF-17 and that all statements and matters set forth therein are true and correct to the best of his knowledge.

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• r /t Hal B. Tucker, Vice President Subscribed and sworn to before me this 24th day of June, 1986.

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