ST-HL-AE-5272, Provides Addl Info Re Proposed Special Test Exception 3.10.8
| ML20134F166 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 01/08/1996 |
| From: | Leazar D HOUSTON LIGHTING & POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ST-HL-AE-5272, TAC-M92169, TAC-M92170, NUDOCS 9611050004 | |
| Download: ML20134F166 (7) | |
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The Light i
c o m p a n y South Texas Project Electric Generating Station P. O. Box 289 Wadsworth, Texas 77483 Houston Lighting & Power January 8, 1996 ST-HL-AE-5272 File No.: G20.02.01 l
10CFR50.90, 50.92 U. S. Nuclear Regulatory Commission Attention: Document Control Desk l
Washington, DC 20555-0001 1
South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499
)
Additional Information Regarding Proposed Special Test Exception 3.10.8 l
(TAC No. M92169/M92170)
In our letter dated May 1,1995 (ST-HL-AE-5076), the South Texas Project proposed a change to the South Texas Project Units 1 and 2 Technical Specifications that would incorporate a Special Test Exception for an allowed outage of up to 21 days per cycle for each Standby Diesel. In our letter dated August 28,1995 (ST-HL-AE-5141), the South Texas Project responded to Nuclear Regulatory Commission questions regarding the justification and implementation of the proposed Special Test Exception. The primary basis for the Special Test Exception is the South Texas Project's Probabilistic Safety Assessment, which demonstrates the risk of the Special Test Exception is acceptably small. The South Texas l
Project performed deterministic analyses to supplement the Probabilistic Safety Assessment basis for the proposed Special Test Exception. The Nuclear Regulatory Commission staff subsequently requested additional clarification on the containment temperature and pressure analysis perforrned to support the Probabilistic Safety Assessment bases for the submittal.
The attachment to this submittal responds to that request.
As noted in our letter dated January 4,1996 (ST-HL-AE-5261), the South Texas Project's three train design bases is not changed by the proposed Special Test Exception, and i
the Probabilistic Safety Assessment provides the primary justification for the acceptability of l
the Special Test Exception.
1 The South Texas Project responses are attached. If you have any questions, please contact me at 512-972-7795, or Mr. A. W. Harrison at 512-972-7298.
- h. C n,,- -
D. A. Leaz#
Director.
9611050004 96010s PDR ADOCK 05000498 Nuclear Fuel and Analvsis P
PDR TCK/lf
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Attachment:
Response to Nuclear Regulatory Commission i
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l Houston Lighting & Power Company ST.HL-AE-5272 South Texas Project Electric Generating Sation File No.: G20.02.01 Page 2 c:
l Leonard J. Callan Rufus S. Scott Regional Administrator, Region IV Associate General Counsel U. S. Nuclear Regulatory Commission Houston Lighting & Power Company 611 Ryan Plaza Drive, Suite 400 P. O. Box 61067 Arlington, TX 76011-8064 Houston, TX 77208 l
Thomas W. Alexion Institute of Nuclear Power Project Manager Operations - Records Center U. S. Nuclear Regulatory Commission 700 Galleria Parkway Washington, DC 20555-0001 13H15 Atlanta, GA 30339-5957 David P. Loveless Dr. Joseph M. Hendrie Sr. Resident Inspector 50 Bellport Lane c/o U. S. Nuclear Regulatory Comm.
Bellport, NY 11713 P. O. Box 910 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 U. S. Nuclear Regulatory Comm.
K. J. Fiedler/M. T. Hardt Attn: Document Control Desk City Public Service Washington, D. C. 20555-0001 P. O. Box 1771 San Antonio, TX 78296 J. C. Lanier/M. B. Lee J. R. Egan, Esquire City of Austin Egan & Associates, P.C.
Electric Utility Department 2300 Il %:et, N.W.
721 Barton Springs Road Washington, D.C. 20037 Austin, TX 78704 Central Power and Light Company J. W. Beck ATTN: 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 l
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Attachment to ST-IIL-AE-5272 Page I of 5 CONTAINMENT PRESSUREffEMPERATURE ANALYSIS LIST OF ASSUMPTIONS.
LOCA MSLB Single ESF-Train Multiple ESF-Trains Single ESF-Train Multiple ESF-Trains Double Ended Pump Double Ended Pump 102% Power, MSIV Failure 102% Power, MSIV Failure l
Suction Guillotine with Suction Guillotine with with Minimum with Minimum Minimum Safety Injection Maximum Safety injection Containment licat Removal Containment Heat Removal and Minimum Containment and Minimum Containment Systems in Operation Systems in Operation Heat Removal Systems in Heat Removal Systems in Operation Operation Number of Spray trains 1
2 1
3 i
, operat ng Spray tiowrate 1885 gpm 3800 gpm 1885 gpm 4700 gpm Spray initiation time 140 sec 82.6 sec 140 sec 90.6 see Number of RCFC trains 1
2 1
3 operating Number of RCFCs 1
3 1
5 RCFC initiation time 66.1 sec 38 sec 67.7 sec 67.7 sec l
CCW temperature 125 F 110 F 125*F 110 F CCW llow to each RCFC 1600 gpm 1800 gpm 1600 gpm 1800 gpm Total CCW flow to all 1600 gpm 5400 gpm 1600 gpm 9000 gpm RCFCs used in the analysis 4
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