ML19332E897

Provides Required Program Proposal for Completion of Individual Plant Exam for Severe Accident Vulnerabilities on Plant & Submittal of Results to Nrc,Per Generic Ltr 88-20

ML19332E897
Person / Time
Site:	South Texas
Issue date:	09/29/1989
From:	Rosen S HOUSTON LIGHTING & POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-GTECI-A-45, REF-GTECI-SC, TASK-A-45, TASK-OR GL-88-20, ST-HL-AE-3244, NUDOCS 8912130119
Download: ML19332E897 (5)

Text

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The Light  !

company P.O. Box 1700 Houston. Texas 77001 (715) 228 9211 He WM Pm .

t September 29, 1989 ST.HL AE 3244 l File No.: C31.5 +

10CFR50.54(f) l U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 South Texar, Project Electric Cenerating Station  ;

Unis 1 and 2 '

Docket Nos. STN 50 498, STN 50 499  ;

Schedule for Implementation of the Individual Plant Examination for Severe Accident Vulnerabilities 10 CFR 50.54(f) (Cenerie latter No. 88-20) _

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References:

1. Generic Letter 88 20, " Individual Plant Examination for Severe Accident Vulnerabilities 10 CFR 50.54(f)", dated l

November 23, 1988. ,

2. Generic Letter A8 20, Supplement No. 1, " Initiation of the <

i Individual Plant Examination for Severe Accident Vulnerabilities 10 CFR 50.54(f)", dated August 29, 1989.

3. NUREG 1335, ' Individual Plant Examination: Submittal ,

Guidance, Final Report", August 1989.

4. Letter ST.HL AE 3059 from M. A. McBurnett to Document Control Desk dated April 14, 1989.

5. Letter ST HL AE 3137 from M. A. McBurnett to Document Control Desk dated June 15, 1989.

Reference 1 requires that each licensee holding an operating license for a nuclear power plant reactor facility perform an Individual Plant Examination (IPE) of its plant (s) for severe accident vulnerabilities and submit the results to the Nuclear Regulatory Commission (NRC). In addition, Reference 1

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requires that the licensee submit the IPE results within three years of the issuance of the final draft of NUREG 1335, " Individual Plant Examination:

Submittal Guidance" (Reference 3). Reference 2, dated August 29, 1989, announces the availability of NUREG 1335, thus starting the three year period.

The licensee is also required by References 1 and 2 to submit its proposed prograu for completing the IPE within 60 days of the date of issuance of Reference 3.

8912130119 $90929 gDR ADOCK0500gg8 f 0ll A1/031.NL8 A Subsidiary of liouston Industries incorporated #

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The proposed program should:

1. Identify the method and approach selected for performing the IPE,  !

2. Describe the method to be used, if it has not been previously submitted fcr staff review (the description may be by reference), >

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3. Identify the milestones and schedules for performing th; 27E and submitting the results to the NRC.

The purpose of this letter is to provide the required progran proposal for the i completion of an IPE on the South Texas Project Electric Cenerating Station (STPECS) and submittal of the results to the NRC.

Section 4 of Reference 1 identifies three approaches that will satisfy the examination requested by the Generic Letter 88 20 (CL 88 20). The first of these approaches will be utilized by STPECS. This approach consists of a ,

Level 1 Probabilistic Risk Assessment (PRA) which uses current methods and information, plus a containment performance analysis that will follow the general guidance given in Appendix 1 to CL 88 20. A Level 1 PRA consists of determination of core damage frequencies based on system and human. factor evaluations.

With reference 4. Houston Lighting & Power Company (HL&P) transmitted the report entitled ' South Texas Project Probabilistic Safety Assessment Summary Report". The Summary Report provided an overview of the results of a level 1 PRA on STPECS which followed the general guidance suggested by the draft NUREC 1335. In addition to the requirements for the Lavel 1 PRA identified in Reference 1, the STPECS Probabilistic Safety Assessment (PSA)  ;

includes a detailed analysis of external events (i.e., seismic events.

internal fires and external floods, as well as internal floods) and an uncertainty analysis. The completed PSA reflects the as. built and operated status of Unit 1 as of October 1988. The perforan ce of the Level 1 PRA has resulted in several changes in the plant as described in the PSA and Summary Report.

Subsequent to the submittal of ths PSA Summary Report, the NRC requested that HL&P formally submit the backup documentation for review. By Reference 5, HL&P has transmitted the detailed PSA documentation including drawings, procedures used, system notebooks, etc. This documentation is currently under review by the NRC and their contractor, Sandia National Laboratory (SNL).

HL&P believes that these submittals meet the requirements cf the front end portion of the IPE.

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' Houston Lighting Ac Power Compan)

ST HL AE 3244 Page 3

HLkP will complete the required containment performance analysis in accordance with the guidence as provided in Appendix 1 to CL 88 20 and as ,

supplemented in the final version of NUREC 1335. The results of this analysis will be provided to the NRC by August 29, 1992. At that time the NRC will also be provided with responses to other issues which may be or are required to be included in the IPE evaluation. For example, the NRC invites the addressing of any Unresolved safety /Ceneric Safety Issues (USI/CSI) in addition to the required USI A 45, " Shutdown Decay Heat Removal Requirements".

These will be addressed in the final submittal. '

If you should have any questions with regard to any information '

contained in this letter or any information contained in the references, please contact A. W. Harrison at (512) 972 7298.

A S. L. Rosen .

Vice President, Nuclear Engineering & Construction SLR/SDP/n1 l

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Houston Lighting & Pbwer Ciampany

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File No.: C31.5 l Page 4 [

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i Regional Administrator, Region IV Rufus S. Scott Nuclear Regulatory Commission Associate General Counsel  !

611 Ryan Plaza Drive, Suite 1000 Houston Lighting & Pever Company Arlington, TX 76011 P. O. Box 1700 .

Houston, TX 77001  !

George Dick, Project Manager U. S. Nuclear Regulatory Commission INPO ,

Washington, DC 20$55 Records Center 1100 circle 75 Parkway i Jack E. Bess Atlanta, CA 30339 3064 Senior Resident Inspector Unit 1 .

c/o U. S. Nuclear Regulatory Commission Dr. Joseph M. Hendrie

• P. O. Box 910 50 Bellport Lane Bay City. TX 77414 Be11 port, NY 11713 J. 1. Tapia D. R. Lacker Senior Resident Inspector Unit 2 Bureau of Radiation Control

• c/o V. S. Nuclear Regulatory Commission Texas Department of Health '

P. O. Box 910 1100 West 89th Street Bay City, TX 77414 Austin, TX 78756 3189 J. R..Newman, Esquire Newman & Holtzinger, P. C.

1615 L Street, N. W.

Washington, DC 20036  ;

R. L. Range /R P. Verret Central Power & Light Company P. 0. Box 2121 Corpus Christi, TX 78403 R. John Miner (2 Copies)

Chief Operating Officer City of Austin Electric Utility 721 Barton Springs Road Austin, TX 78704 R. J. Costello/M. T. Hardt City Public Service Board P. C. Box 1771 San Antonio, TX 78296 1

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.. UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMIS810N In the Matter )

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Nouston Lighting & Power ) Docket Nos. 50-498 Company, et al., ) 50-499

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South Texas Project )

Units 1 and 2 )

AFFIDAVIT

3. L. Rosen being duly sworn, hereby deposes and says that he is Vice President, Nuclear Engineering and Construction of Houston Lighting & Power company; that he is duly authorised to sign and file with the Nuclear Regulatory Commission the attached program proposal for the completion of an IPE on the South Texas Project Electric cenerating Station; is familiar with the content

thereof; and that the matters set forth therein are true and correct to the best of his knowledge and belief.

i S. L. Rosen Vice President Nuclear Engineering and Construction Subscribed and sworn to before me, a Notary Public in and for The State of Texas this At$ day of @t) , 1989.

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th teameen tapa 44)H litittry Public in and ior the

! State of Texas L

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