ML20012E191
| ML20012E191 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/23/1990 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20012E192 | List: |
| References | |
| TXX-90083, NUDOCS 9003300192 | |
| Download: ML20012E191 (2) | |
Text
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_FE Log # TXX-90083' T_,
Fi1e # 10010 r
C nlELECTRIC March 23, 1990
% imam J. Cahut. Jr.
Esecuuve Vke besant U.' S.. Nuclear' Regulatory Commission Attnt Document Control Desk Washington D. C.
20555
SUBJECT:
. COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 RELOAD ANALYSIS-METHODOLOGY (CONTROL ROD SWAP METHODOLOGY)
Gentlemen:
As part of the TU Electric reload analysis program, a methodology has been developed for verifying control rod worth during startup physics tests by-utilizing-a " rod-swap"_ technique. The TU Electric methodology.will be applied to CPSES Unit 1. cycle 2, and subsequent cycles. The cycle 1 startup testing will be supported with analytical results-providod by Westinghouse.
- However, Unit.1, cycle 1, control rod swap analyses have also been performed utilizing the TU Electric methodology, and the results of those analyses are presented-in the attachment. The TU Electric results are being provided prior to startup testing, thereby putting in place a " blind prediction" to substantiate-the-reliability of the TV Electric methodology.
A steady state reactor physics methodology has been developed by TV Electric to be' utilized in support of reload design,= licensing, and operation of CPSES' Units 1 and 2.
The generalized methodology:is documented in Report Np.
RXE-89-003-P and was transmitted for your review in letter TXX-89533. dated July 31, 1989.
Included in that report are the'results of pre-startup calculations for Comanche Peak Unit 1, cycle 1 using the TV Electric
_ methodology, s
After the issuance of Report No. RXE-89-003-P, TU Electric elected to incorporate the flexibility of utilizing Bank Exchange as an alternative method of measuring control rod worth during the startup testing of Comanche-Peak Unit 1, cycle 1.. In order to maintain such flexibility for reload cycles,. TU Electric developed an analytical methodology to support control red worth measurements using the control rod swap technique.
The TU Electric control rod swap methodology is summarized its the attachment to this letter.
This inforaiation complements that previously provided,in Report No.
RXE-89-003-P.
TU Electric is preparing a topical report addressing the calculation of control rod worth. That report will provide more detailed information with respect to analytical models as well as comparisons of calculated results to measurements utilizing the control rod swap method and the boron dilution method. A comparison of the attached calculated results to the measured result obtained from CPSES Unit 1, cycle 1 will be included.
9003300192 900323 ff/
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400 Nonh olive street LB. si Dallas, Texas 75201 8 i
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e TXX 90083 March 20, 19901 1
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Page 2 of 2-If you h' ave any questions on this material please contact Mickey R. K111 gore (214 812 8271) or Jimmy D. Seawright (214-812-4375) of my staff _.
Sincerely.
Willina o. Cani11. Jr..
By:
J $ W. Beck Vice President.
Nuclear Engineering JOS/vid
' Attachments c - CCS - CPSES/E06-Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3)
Chris I. Grimes
-Robert C Jones.Jr.
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