ST-HL-AE-1295, Forwards Revised South Texas Project Preliminary Scoping Study Results. Rept Contains Results of Preliminary Assessment of Plant Safety Using Limited Application of PRA Technology

Forwards Revised South Texas Project Preliminary Scoping Study Results. Rept Contains Results of Preliminary Assessment of Plant Safety Using Limited Application of PRA Technology

ML20128D363
Person / Time
Site:	South Texas
Issue date:	06/28/1985
From:	Wisenburg M HOUSTON LIGHTING & POWER CO.
To:	Knighton G Office of Nuclear Reactor Regulation
Shared Package
ML20128D367	List: ML20128D387 ST-HL-AE-1295, Forwards Revised South Texas Project Preliminary Scoping Study Results. Rept Contains Results of Preliminary Assessment of Plant Safety Using Limited Application of PRA Technology
References
CON-#385-661 OL, ST-HL-AE-1295, NUDOCS 8507050094
Download: ML20128D363 (2)

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The Light Company ii.,m,,, ugi,m,x am, m is,,simoii.,m,,cics.mo u n msei June 28, 1985 ST-HL-AE-1295 File No. G31 Mr George W Knighton, Chief Licensing Branch No. 3 Division of Licensing US Nuclear Regulatory Commission Washington, DC 20555 South Tcxas Project Unit.s 1 And 2 Docket Nos S'.'N 5 0-4 9 8, STN 50-499 Preliminary Scoping Study Results

Dear Mr Knighton:

We understand that the Advisory Committee on Reactor Safeguards has suggested that industry sponsored and initiated Probabilistic Risk Assessments (PRAs) be made available to them and to the NRC staff.

Accordingly, the attached document reports the results of a preliminary scoping assessment of plant safety using a limited ap-plication of probabilistic risk assessment technology.

Its analy-tical coverage was limited to those initiating events and aspects of plant response judged most important by the study team.

Broad un-certainties in the numerical results of this scoping study exist in comparison to a full-scope assessment.

The qualitative engineering conclusions and recommendations of the report, however, are con-sidered valuable.

In fact, we have already initiated plant improve-ments as well as continuing to develop our own in-house PRA capabil-ities should we decide, at some point after plant startup, to perform a detailed PRA.

If you should have any questions on this matter, please contact Mr M E Powell at (713) 993-1328.

Very rul

yours,

(

k,/

M R Wisen rg Manager, N clear Licensing JBH/aks

Enclosure:

STP Preliminary Scoping Study Results pga7o:88u88%e 4f BM

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ST-HL-AE-1295 File No: G31 Houston Lighting & Power Company Page 2 cc:

Hugh L. Thompson, Jr., Director J. B. Poston/A. vonRosenberg Division of Licensing City Public Service Board Office of(Nuclear Reactor Regulation P.O. Box 1771 U.S. Nuclear Regulatory Comission San Antonio, TX 78296 Washington, DC 20555 Brian E. Berwick, Esquire Robert D. Martin Assistant Attorney General for Regional Administrator, Region IV the State of Texas Nuclear Regulatory Commission P. O. Box 12548, Capitol Station 611 Ryan Plaza Drive, Suite 1000 Austin, TX 78711 Arlington, TX 76011 Lanny A. Sinkin

• N. Prasad Kadambi, Project Manager 3022 Porter Street, N.W. #304 U.S. Nuclear Regulatory Commission Washington, D. C.

20008 7920 Norfolk Avenue Bethesda, MD 20814 Oreste R. Pirfo, Esquire Hearing Attorney Claude E. Johnson Office of the Executive Legal Director Senior Resident Inspector /STP U.S. Nuclear Regulatory Commission c/o U.S. Nuclear Regulatory Commission Washington, DC 20555 P. O. Box 910 Bay City, TX 77414 Charles Bechhoefer, Esquire Chairman, Atomic Safety & Licensing Board M. D. Schwarz, Jr., Esquire U.S. Nuclear Regulatory Commission Baker & Botts Washington, DC 20555 One Shell Plaza l

Houston, TX 77002 Dr. James C. Lamb, III 313 Woodhaven Road J. R. Newman, Esquire Chapel Hill, NC 27514 Newman & Holtzinger, P.C.

1615 L Street, N.W.

Judge Frederick J. Shon Washington, DC 20036 Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Director, Office of Inspection Washington, D. C.

20555 and Enforcement U.S. Nuclear Regulatory Commission Mr. Ray Goldstein, Esquire Washington, DC 20555 1001 Vaughn Building 807 Brazos E. R. Brooks /R. L. Range Austin, TX 78701 Central Power & Light Company P. O. Box 2121 Citizens for Equitable Utilities, Inc.

Corpus Christi, TX 78403 c/o Ms. Peggy Buchorn Route 1, Box 1684 H. L. Peterson/G. Pokorny Brazoria, TX 77422 City of Austin P. O. Box 1088 Docketing & Service Section Austin, TX 78767 Office of the Secretary U.S. Nuclear Regulatory Commission Washington, DC 20555

• copy provided separately W2/ MISC /g Revised 5/22/85 J