ML20198M695
| ML20198M695 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/30/1998 |
| From: | Polich T NRC (Affiliation Not Assigned) |
| To: | Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| TAC-M97131, NUDOCS 9901050325 | |
| Download: ML20198M695 (4) | |
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p December 30, 1998 l
Mr. C. Lance Terry TU Electric Senior Vice President & Principal Nuclear Officer Attn: Regulatory Affairs Department P. O. Box 1002 Glen Rose,TX 76043
SUBJECT:
10 CFR 50.46 LARGE BREAK LOSS OF COOLANT EVALUATION MODEL FOR COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 (TAC NOS. M97131 AND M97132)
Dear Mr. Terry:
By a letter dated February 3,1997, the NRC staff acknowledged that your letter dated November 29,1996 (TXX-96517), included an attachment docurnenting your large braak loss-of-coolant accident (LBLOCA) analyses for the Texas Utilities Electric (TU Electric), Comanche Peak Steam Electric Station (CPSES), Units 1 and 2 using a linear interpolation for reflood heat transfer coefficient between reflood rates of 1.0 and 1,74 in/sec. At that time, the staff reviewed these analyses and found them acceptable, pending final resolution of the issues pertaining to the TOODEE2 reflood heat transfer model with Siemens Power Corporation (SPC). The staff confirms that the linear interpoiation methodology appears to be conservative, and that TU Electric is in compliance with the applicable parts of 10 CFR 50.46 and Appendix K. The staff has also reviewed your letter dated January 13,1997, and agrees with TU Electric's proposed course of action regarding the error in the Z-equivalent parameter in TOODEE2. The staff also accepted the results reported in your letter dated January 13,1997 (TXX-97013), as your analyses of record for the CPSES units; and stated those would be used as the " baseline" for the purposes of determining "significant" changes in the peak cladding temperatures for CPSES, Units 1 and 2. Finally, we stated that your request, in letter dated October 25,1996 (TXX-96497), to review the data to justify SPC's 1986 model was considered to have been superseded by your November 29,1996, and January 13,1997, letters and subsequent conference calls with the staff that were discussed in the February 3,1997 letter.
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TACs M97131 and M97132 were opened to track this issue and any followup actions that might have resulted from our further review of your submittal. We did not find any further concerns and therefore the TACs are closed.
4 Sincerely, ORIGINAL SIGNED BY:
Timothy J. Polich, Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/lV Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 cc: See next page DISTRIBUTION:
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4 C. Lance Terry i TACs M97131 and M97132 were opened to track this issue and any followup actions that might have resulted from our further review of your submittal. We did not find any further concerns and therefore the TACs are closed.
Sincerely, M
1 Timothy J. Polich, Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/lV Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 cc: See next nage l
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l Mr. C. Lance Teny i
TU Electric Company Comanche Peak, Units 1 and 2 l
cc:
I Senior Resident inspector Honorable Dale McPherson U.S. Nuclear Regulatory Commission County Judge P. O. Box 2159 P. O. Box 851 Glen Rose, TX 76403-2159 Glen Rose, TX 76043 Regional Administrator, Region IV Office of the Governor U.S. Nuclear Regulatory Commission ATTN: John Howard, Director 611 Ryan Plaza Drive, Suite 400 Environmental and Natural Arlington,TX 76011 Resources Policy P. O. Box 12428 Mrs. Juanita Ellis, President Austin, TX 78711 Citizens Association for Sound Energy 1426 South Polk Arthur C. Tate, Director Dallas,TX 75224 Division of Compliance & Inspection Bureau of Radiation Control l
Mr. Roger D. Walker Texas Department of Health TU Electric 1100 West 49th Street Regulatory Affairs Manager Austin, TX 78756-3189 P. O. Box 1002 Glen Rose, TX 76043 Jim Calloway Public Utility Commission of Texas George L. Edgar, Esq.
Electric Industry Analysis Morgan, Lewis & Bockius P. O. Box 13326 1800 M Street, N.W.
Austin, TX 78711-3326 Washington, DC 20036-5869 i
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