ST-HL-AE-5550, Application for Amends to Licenses NPF-76 & NPF-80,amending Tech Specs 3/4.4.5 & 3.4.6.2 to Allow Installation of Laser Welded Tube Sleeves as Alternative to Plugging Defective SG Tubes

Application for Amends to Licenses NPF-76 & NPF-80,amending Tech Specs 3/4.4.5 & 3.4.6.2 to Allow Installation of Laser Welded Tube Sleeves as Alternative to Plugging Defective SG Tubes

ML20137B945
Person / Time
Site:	South Texas
Issue date:	03/17/1997
From:	Cloninger T HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20137B951	List: ML20137B969 ST-HL-AE-5550, Application for Amends to Licenses NPF-76 & NPF-80,amending Tech Specs 3/4.4.5 & 3.4.6.2 to Allow Installation of Laser Welded Tube Sleeves as Alternative to Plugging Defective SG Tubes
References
ST-HL-AE-5550, TAC-M95401, TAC-M95402, NUDOCS 9703240108
Download: ML20137B945 (4)

Text

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The Light company Houston Lighting & Power South Tenas Project Electric Generating station P.o. Bos 289 Wadsworth. Texas 77483 f

March 17,1997 ST-HL-AE-5550  ;

File No.: G20.02.01 10CFR50.90 10CFR50.92 10CFR51 U. S. Nuclear Regulatory Commission  !

. Attention: Document Control Desk i Washington, DC 20555 l

South Texas Project i Units 1 & 2 Docket Nos.: STN 50-498, STN 50-499 Proposed Amendment of Technical Specifications 3/4.4.5 and 3.4.6.2 to Incorporate l 1

Steam Generator Tube Renair Usine Laser Welded Sleeves (TAC Nos. M95401/M95402)

References:

1. Letter from T. H. Cloninger to the Nuclear Regulatory Commission Document Control Desk, dated May 17,1996 (ST-HL-AE-5362)

2. WCAP-13698, " Laser Welded Sleeves for 3/4 Inch Diameter Tube l

Feedring-Type and Westinghouse Preheater Steam Generators, Generic Sleeving Report", Revision 2, April 1995

3. WCAP-14653, " Specific Application of Laser Welded Sleeves for the South 1 Texas Power Plant Steam Generators", June 1996

4. Letter from L. E. Martin to the Nuclear Regulatory Commission Document Control Desk, dated June 14,1996 (ST-HL-AE-5398)

In reference 1, the South Texas Project proposed to amend Facility Operating Licenses NPF-76, Unit I and NPF-80, Unit 2 to allow installation of laser welded tube sleeves as an alternative to plugging defective steam generator tubes.

f As part of the Nuclear Regulatory Commission's review of the proposed amendment, l it was noted that the Westinghouse topical reports to be used for the sleeve design, installation, and inspection were discussed in the Safety Evaluation and No Significant Hazards Consideration Determination, but were not specified in the amended Technical Specification pages. Also, the inspection sample size for repaired tubes was not specified, g[)/

Revised Technical Specification pages are attached which specify the Westinghouse topical reports (references 2 and 3 listed above) and specify the inspection sample sizes for repaired tubes.

Listing the Westinghouse topical reports in the Technical Specifications binds the South Texas Project to specific inspection techniques. For future inservice inspections of 94.\NRC-WK\TSC Gh5150 wp Project Manneer on Retintf of the Participants in the South Texas Project sTi soisssos b0 0498 lElIEE%kEk,E,h p PDR 3

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Ho'uston Lighting & Power Company l

, South Texas Project Electric Generating Station i ST-HL-AE-5550 File No.: G20.02.01 - l Page 2 l sleeves, the South Texas Project will evaluate the use of improved inspection techniques as ,

j they are developed and qualified and request a license amendment if use of the improved inspection techniques is warranted.

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In addition, post weld heat treatment of the laser welded sleeves, which is discussed in j the reference 2 as being an option for short term operation, was not specifically discussed in

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the Safety Evaluation and No Significant Hazards Consideration Determination. For i

clarification, South Texas Project plans to heat treat the welded joints of the laser welded j sleeves to relieve the residual stresses in the weld zone for longer term operation. Heat treatment will be performed as described in references 2 and 3, which were submitted with references 1 and 4, respectively.

The revised Technical Specification pages that are attached to this letter and the above discussion of post weld heat treatment of welded joints do not require a change to the discussion or conclusions of the significant hazards consideration previously submitted. In addition, the conclusion that the proposed amendment satisfies the criteria of  ;

10 CFR 51.22(c)(9) for categorical exclusion from the requirement for an environmental  !

assessment is similarly unafTected.

The required affidavit and marked up Technical Specifications pages are included as attachments to this letter.

In accordance with 10 CFR 50.91(b), South Texas Project is providing the State of Texas with a copy of this proposed amendment.

If you should have any questions concerning this matter, please call Mr. A. W.

Harrison at (512) 972-7298 or myself at (512) 972-8787.

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. H. Clo mge Vice P side ,

Nucl ar En ' eering DNB/

Attachments: 1. Affidavit

2. Proposed Change to Technical Specifications 3/4.4.5 and 3.4.6.2 DWP\ML\NRC.WK\T5C47\5550 wp STI 3015e506

Houston Lighting & Power Company South Texas Project Electric Generating Station ST-HL-AE-5550 i

File No.:G20.02.01 Page 3 Regional Administrator, Region IV Rufus S. Scott U. S. Nuclear Regulatory Commission Associate General Counsel 611 Ryan Plaza Drive, Suite 400 Houston Lighting & Power Company Arlington, TX 76011-8064 P. O. Box 61067 Houston, TX 77208 Th1 mas W. Alexion Institute of Nuclear Power l Project Manager, Mail Code 13H3 Operations - Records Center U. S. Nuclear Regulatory Commission 700 Galleria Parkway Washington, DC 20555-0001 Atlanta, GA 30339-5957

) David P. Loveless Dr. Bertram Wolfe j Sr. Resident Inspector 15453 Via Vaquero c/o U. S. Nuclear Regulatory Comm. Monte Sereno, CA 95030 P. O. Box 910 3 Bay City, TX 77404-0910 Richard A. Ratliff Bureau of Radiation Control J. R. Newman, Esquire Texas Department of Health

Morgan, Lewis & Bockius 1100 West 49th Street 1800 M Street, N.W. Austin, TX 78756-3189 Washington, DC 20036-5869 J. R. Egan, Esquire M. T. Hardt/W. C. Gunst Egan & Associates, P.C.

City Public Service 2300 N Street, N.W.

P. O. Box 1771 Washington, D.C. 20037 J

San Antonio, TX 78296 J. C. Lanier/M. B. Lee U. S. Nuclear Regulatory Commission City of Austin Attention: Document Control Desk Electric Utility Department Washington, D.C. 20555-0001 721 Barton Springs Road Austin, TX 78704 Central Power and Light Company J. W. Beck ATFN: G. E. Vaughn/C. A. Johnson Little Harbor Consultants, Inc.

P. O. Box 289, Mail Code: N5012 44 Nichols Road Wadsworth, TX 77483 Cohassett, MA 02025-1166 E \WP\NL\NRC.WK\TSC4h$$50 mp STI 30l$3506

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Attachment 1 ST-HL-AE-5550 1 Page 1 of 1 l l

, UNITED STATES OF AMERICA 3 NUCLEAR REGULATORY COMMISSION i In the Matter of )  !

) l Houston Lighting & Power ) Docket Nos. 50-498  !

Company, et al., ) 50-499 I 1

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South Texas Project ) ,

Units 1 and 2 )

AFFIDAVIT 4

I, T. H. Cloninger, being duly sworn, hereby depose and say that I am Vice President, Nuclear Engineering, of Houston Lighting & Power Company; that I am duly authorized to i sign and file with the Nuclear Regulatory Commission the attached revised pages to Technical

Specifications 3/4.4.5 and 3.4.6.2; that I am familiar with the content thereof; and that the matters set forth therein are true and correct to the best of my knowledge and belief.

1

.H. Clon" ger Vice Pr ide ,

j Nuc ar E gineering STATE OF TEXAS )

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COUNTY OF MATAGORDA )

i Subscribed and sworn to before me, a Notary Public in and for the State of Texas, this /7 M day of MO ec[ ,1997.

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,- OM No6ry Pdblic ihnd for the i

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, State of Texas 1 E\WP\NL.WRC-WK\TSC ehS$50 wp $T1 3015:506

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