ST-HL-AE-4614, Withdraws Application for Amend to TS Surveillance Requirements 4.5.6.1 & 4.6.2.1.b Re RHR & CS Pumps.Revised TSs Encl

Withdraws Application for Amend to TS Surveillance Requirements 4.5.6.1 & 4.6.2.1.b Re RHR & CS Pumps.Revised TSs Encl

ML20059K980
Person / Time
Site:	South Texas
Issue date:	11/05/1993
From:	Cloninger T HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20059K985	List: ML20059L008 ST-HL-AE-4614, Withdraws Application for Amend to TS Surveillance Requirements 4.5.6.1 & 4.6.2.1.b Re RHR & CS Pumps.Revised TSs Encl
References
ST-HL-AE-4614, NUDOCS 9311160260
Download: ML20059K980 (3)

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The Light c o m p a n y Seth Texas Project Dectric Generating Station P. O. Box 289 Wadsworth, Texas 77483 Houston Lighting & Power November 5, 1993 ST-HL-AE-4614 File No.: G20.02.01 G21.02.01 10CFR50.55a 1

U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 South Texas Project Units 1 & 2 l

Docket Nos. STN 50-498, STN 50-499 Revision to Proposed Changes to the South Texas Project Technical Specifications (TAC NOS. M76048 and M76049) .

Reference:

1) Letter from HL&P dated August 16, 1993 (ST-HL-AE-4544) TAC No. 76048/76049

2) Letter from HL&P dated October 22, 1993 (ST-HL-AE-4601) '

In reference 2, HL&P requested relief from the ASME Section XI code for the dedicated Residual Heat Remeval Pumps (RHR), the Containment Spray Pumps (CS) and the Residual Heat Removal Discharge and Miniflow check valves in accordance with the provisions of 10CFR50.55a. This relief for the RHR system was based on the RHR system at STP only being used for long-term closed-loop cooldown following Auxiliary Feedwater (AFW) ,

operation and RCS depressurization. The design at STP includes three separate Low Head Safety Injeccion (LHSI) Pumps to inject ,

water during an accident at STP. Because the LHSI pumps provide the initial accident function, the RHR pumps are not as important, from a risk perspective, in mitigating core damage and less emphasis can be placed on testing the RHR system et power.

Similarly, the relief request for the Containment Spra:r (CS) i Pumps is based on STP having three CS pumps available instead of I the normal plant design that.only has two CS pumps for protecting Containment integrity during core damage or low frequency events.

Due to the increased number of pumps available, the negligible impact on core damage frequency and large early release frequency, less emphasis should be placed on testing the CS pumps i at power.

150093 9311160260 931105 FI PDR l P

ADDCK 0500049ste PDR [-

Project Manager on Behalf of the Participants in the South Texas Project (301 I

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u-9n93-n9.cci (

Houston Lighting & Power Company ST-HL-AE-4614 South Texas Project Electric Generating Station File No. : G20.02.01 G21.02.01 10CFR50.55a Page 2 l

This ASME Section XI Relief request for the RHR and CS Pumps eliminates the need for the proposed changes to Technical Specification Surveillance Requirements (SR) 4.5.6.1 and 4.6.2.1.b. requested in Reference 1. Therefore, HL&P withdraws ,

the proposed changes to Technical Specification SRs 4.5.6.1 and  !

4.6.2.1.b. Revised markups of the Technical Specification pages '

are attached to this letter.  ;

If you should have any questions concerning this matter, please contact Mr. A. W. Harrison at (512) 972-7298 or mys t (512) 972-7921.

T . H. C oni e Vice P esi ent, ,

Nucle r g.neerin d

THG/eg t

Attachment:

1. Revised markups of Technical Spec 1 ions i

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IR-93\93-309.001

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ST-HL-AE-4614 File No.: G20.02.01 l G21.01.01

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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 P. O. Box 61867 j Houston, TX 77208 i Lawrence E. Kokajko Project Manager i U. S. Nuclear Regulatory Commission Institute of Nuclear Power l Washington, DC 20555 13H15 Operations - Records l Center  !

700 Galleria Parkway David P. Loveless Atlanta, GA 30339-5957

• Sr. Resident Inspector  !

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c/o U. S. Nuclear Regulatory Comm. Dr. Joseph M. Hendrie P. O. Box 910 50 Bellport Lane Bay City, TX 77404-910 Bellport, NY 11713 i

J. R. Newman, Esquire D. K. Lacker Newman & Holtzinger, P.C., STE 1000 Bureau of Radiation Control

• j 1615 L Street, N.W. Texas Department of Health I 3

Washington, DC 20036 1100 West 49th Street ,

l Austin, TX 78756-3189 K. J. Fiedler/M. T. Hardt City Public Service U. S. Nuclear Regulatory Comm.

• P. O. Box 1771 Attn: Document Control Desk i San Antonio, TX 78296 Washington, D.C. 20555 l J. C. Lanier/M. D. Lee  !

City of Austin Electric Utility Department  !

721 Barton Springs Road i Austin, TX 78704 l G. E. Vaughn/T. M. Puckett i Central Power and Light Company l P. O. Box 2121 i Corpus Christi, TX 78403 i

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