ML20101H200
| ML20101H200 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/25/1996 |
| From: | Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TXX-96099, NUDOCS 9603290150 | |
| Download: ML20101H200 (3) | |
Text
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Log # TXX 96099 i
MM File # 10010 l
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Ref. # 10CFR50.46 r
r 1UELECTRIC l
March 25, 1996 C. Lance Terry l
l Gmup We President
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U. S. Nuclear Regulatory Commission Document Control Desk
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l Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50 445 AND 50 446 ANNUAL REPORT 0F CHANGES IN PEAK CLADDING TEMPERATURE REF:
1)
TU Electric letter logged TXX 95091 from Mr. C. L. Terry to the NRC dated April 5, 1995 f
Dear Sirs:
In accordance with the requirements of 10CFR50.46(a)(3)(ii). TU Electric submits the attached changes or errors discovered in the Emergency Core Cooling System (ECCS) evaluation model used to calculate peak cladding temperature (PCT) and the estimated effect of these changes or errors on
.i the limiting ECCS analysis.
It is the current TU Electric practice to perform a new large break LOCA analysis for each reload cycle thereby i
establishing a new PCT for each fuel cycle.
In the last report of PCT changes, submitted by Reference 1, a new analysis of PCT was performed for Unit 2 as a result of changing from a l
Westinghouse to a TV Electric large break Loss of Coolant Accident (LOCA)
ECCS evaluation model.
The change in the Unit 2 PCT from that provided i
in the last report reflects the new analysis performed for fuel cycle 3 and is not the result of any errors discovered in the ECCS evaluation model.
The analysis for Unit 1 continues to be based on TV Electric methodology and reflects the analysis performed for fuel cycle 5.
"4"r 9603290150 960325 t
PDR ADOCK 05000445 R
PDR Energy Plaza 1601 Bryan Street Dallas, Texas 75201-3411 l
l Page 2 of 2 Attached are the calculated CPSES Units 1 and 2 PCT values for the l
limiting transients (large break LOCA) and the changes in these values since the last annual report.
Sincerely, S.$.~
C. L. Terry By:
M Roger D. Walker Regulatory Affairs Manager BSD/bd Attachment cc:
Mr. L. J. Callan, Region IV Hr. W. D. Johnson, Region IV Mr. T. J. Polich, NRR Resident Inspectors i
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Attachment to TXX 96099 l
Page 1 of 1 l
l CPSES UNIT 1 PEAK CLADDING TEMPERATURE CHANGES ('F)
PREVIOUSLY REPORTED PCT VALUE (CYCLE 5 ANALYSIS) 1956 (TU ELECTRIC METHODOLOGY)
ECCS MODEL ASSESSMENTS - NONE N/A CURRENT PCT VALUE (CYCLE 5 ANALYSIS) 1956 (TV ELECTRIC METHODOLOGY)
CPSES UNIT 2 PEAK CLADDING TEMPERATURE CHANGES (*F)
ANALYSIS OF RECORD 1804 (WESTINGHOUSE METHODOLOGY)
PREVIOUSLY REPORTED ECCS MODEL ASSESSMENTS 109 PREVIOUSLY REPORTED PCT VALUE 1913 ECCS MODEL ASSESSMENTS NONE N/A CURRENT PCT VALUE (CYCLE 3 ANALYSIS) 1949 (TV ELECTRIC METHODOLOGY)
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