ML20217E438

Requests Addl Info to Complete Review of Util Request Re Doses from Potential Leakage of Sump Water Into Refueling Water Storage Tank.Info to Be Submitted within 30 Days from Date of Ltr

ML20217E438
Person / Time
Site:	South Texas
Issue date:	09/18/1997
From:	Alexion T NRC (Affiliation Not Assigned)
To:	Cottle W HOUSTON LIGHTING & POWER CO.
References
TAC-M99105, TAC-M99106, NUDOCS 9710070030
Download: ML20217E438 (3)

Text

____ - _ _ _

e Mr. William T. Cottle September 18, 1997-Executive Vice President &

General Manager, Nuclear

, Houston Lighting & Power Comoany South Texas Project Electric Generating Station P. O. Box 289 Wadsworth, TX 77403

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING DOSES FROM I POTENTIAL LEAKAGE OF SVMP WATER INTO THE REFUELING WATER STORAGE l TANK (TAC NOS. M99105 AND M99106)

Dear Mr. Cottle:

By letter dated December 17, 1996, Houston Lighting & Power Company (HL&P) arovided its 10 CFR 50.59 summary Report. Unreviewed Safety Question Evaluation (USQE) #92-022, which evaluates the doses resulting from potential leakage of containment sump water into the refueling water storage tank, was one of several USQEs from the Summary Re) ort that the Nuclear Regulatory Commission (NRC) staff selected for furtier review. Upon notification that USQE #92-022 was selected for further review, HL&P promptly provided the USQE

1. 92-022 document. '

ihe NRC staff is reviewing the USQE #92-022 document and has identified additionel information that is needed. It is requested that you provide the additional information within 30 days from the date of this letter.

Sincerely, ORIGINAL SIGNED BY:

Thomas W. Alexion, Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499

Enclosure:

Request for Additional Information cc w/ enc 1: See next page DISTRIBUTION:

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• September 18, 1997 i Mr. William T. Cottle Executive Vice-President &

General Manager, Nuclear Houston Lighting & Fower Company I

South Texas Project Electric  ;

Generating Station l l

P. O. Box 289 Wadsworth, TX 77483 i

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING DOSES FROM l POTENTIAL LEAKAGE OF SUMP WATER INTO THE REFUELING WATER STORAGE l TANK (TAC N05. M99105 AND M99106) l

Dear Mr. Cottle:

By letter dated December 17, 1996, Houston Lighting & Power Company (HL&P) provided its 10 CFR S0.59 Summary Report. Unreviewed Safety Question Evaluation (USQE) #92-022, which evaluates the doses resulting from potential leakage of containment sump water into the refueling water storage tank, was one of several USQEs from the Summary Resort that the Nuclear Regulatory Commission (NRC} staff selected for furtier review. Upon notification that USQE #92-022 was selected for further review, HL&P promptly provided the USQE

1. 92-022 document.

The NRC staff is reviewing the USQE #92-022 document and has identified additional information that is needed. It is requested that you provide the additional information within 30 days from the date of this letter.

Sincerely, 1

Thomas W. Alexion, Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499

Enclosure:

Request for Additional Information cc w/ encl: See next page

Hr. Williaa T. Cottle Houston Lighting & Power Company South Texas, Units 1 & 2 Cc:

Mr. David P. Loveless Jack R. Newman, Esq.

Senior Resident inspector Morgan, Lewis & Bockius j U.S. Nuclear Regulatory Commission 1800 M Street, N.W. 1 P. O. Box 910 Washington, DC 20036-5869 Bay City TX 77414 Hr. Lawrence E. Martin Mr. J. C. Lanier/M. B. Lee General Manager, Nuclear Assurance Licensing City of Austin Houston Lighting and Power Company l

Electric Utility Department l P. O. Box 289 721 Barton Springs Road Wadsworth, TX 77483 '

Austin, TX 78704 Rufus S. Scott Mr. H. T. Hardt Associate General Counsel Mr. W. C. Gunst Houston Lighting and Power Company City Public Service Board P. O. Box 61867 P. O. Box 1771 Houston, TX 77208 San Antonio, TX 78296 Joseph R. Egan, Esq.

Mr. G. E. Vaughn/C. A. Johnson Egan & Associates, P.C.

i Central Power and Light Company 2300 N Street, N.W.

l P. O. Box 289 Washington, DC 20037 1

Mail Code: N5012 Wadsworth, TX 74483 Office of the Governor ATIN: Andy Barrett, Director INPO Environmental Policy Records Center P. O. Box 12428 700 Galleria Parkway Austin, TX 78711 Atlanta, GA 30339-3064 Arthur C. Tate, Director Regional Administrator, Region IV Division of Compliance & Inspection U.S. Nuclear Regulatory Commission Bureau of Radiation Control 611 Ryan Plaza Drive, Suite 400 Texas Department of Health Arlington, TX 76011 1100 West 49th Street Austin, TX 78756 Dr. Bertram Wolfe 15453 Via Vaquero Texas Public Utility Commission Monte Sereno, CA 95030 ATTN: Mr. Glenn W. Dishong 7800 Shoal Creek Blvd.

Judge, Matagorda County Suite 400N Matagorda County Courthouse Austin, TX 78757-1024 1700 Seventh Street Bay City TX 77414

O RE0 VEST FOR ADDITIONAL INFORHATION POTENTIAL LEAKAGE OF SUMP WATER INTO THE REFUELING WATER STORAGE TANK SOUTH TEXAS PROJECT. UNITS 1 AND 2 l

DOCKET NOS.50-49B AND 50-499 l

1. Please provide supporting calculations, including assumptions relating to: (a) buoyancy and natural circulation within the pipes that are postulated to leak sump water into the refueling water storage tank (RMST and Provide the above for both the pr)evious(b) leak which analysis rates for each valve.

resulted in a transport time of 13.4 days, I and the current analyses. Please justify the assumptions discussed above.

2. Provide the isometric drawings of the piping from the leaking valves to the RWST.

3. Provide a discussion on the safety classification and seismic qualification of the piping in the leak path from the sump water source to the RWST.

ENCLOSURE

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