ML20149J662
| ML20149J662 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 02/18/1988 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| TXX-88227, NUDOCS 8802230166 | |
| Download: ML20149J662 (2) | |
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Log # TXX-88227
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File # 10010
-9 903.6 Ref # 10CFR50.30(a)
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1UELECTRIC February 18, 1988
- EIESdN, U. S. Nuclear Regulatory Commission
. ATTN: Document Control Desk Washington, D.C. 20555
SUBJECT:
COMANCHE PEAK STEM ELECTRIC STATION (CPSES) 00CKETS NOS. 50-445 AND 50-446 JET IMPINGEMENT ANALYSES Gentlemen:
During the February 5, 1988 meeting with the NRC concerning CPSES jet impingement analyses, TV Electric committed to provide the NRC with justification for the attenuation factors employed in the analysis of single phase steam jets and two phase flashing water jets.
TV Electric is performing analyses to demonstrate that the attenuation factors presently being utilized at CPSES are conservative. These analyses are being performed as follows:
1.
For single phase jets (i.e., jets with a quality greater than ninety percent) the attenuation factors contained in CPSES calculation CPE-SI-CA-0000-645 will be demonstrated to be conservative with respect to attenuation factors derived using the methodology presented in American National Standard ANSI /ANS 58.2, "Design Basis for Protection of Light Water Nuclear Power Plants Against Effects of Pipe Rupture".
2.
For two phase flashing water jets, an analysis of CPSES specific lines will be performed to demonstrate that the attenuation factors contained in CPSES calculation CPE-SI-CA-0000-645 are conservative with respect to attenuation factors derived using the methodology presented in NUREG/CR-2913 "Two Phase Jet Loads".
Preliminary results of these analyses will be available during the week of February 22, for your review.
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s TXX-88227 February 18,.1988 Page 2 of 2 We are confident that above analyses will demonstrate that the attenuation factors used at CPSES for single phase and two phase Jets are justified.
Very truly yours, (Ws W. G. Counsil BSD/amb c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) s
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