ML20235S611
| ML20235S611 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 10/02/1987 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| ULNRC-1642, NUDOCS 8710090061 | |
| Download: ML20235S611 (5) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Umon j[U111s(?lF11TC?
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1901 Gratiot Street, St. Lows Donald F. Schnell Vice President October 2, 1987 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk l
Washington, D.C.
20555 Gentlemen:
ULNRC-1642 CALLAWAY PLANT DOCKET NO. 50-483 CAL %AWAY PLANT UPRATING SUBMITTAL
References:
~ 1)
ULRNC-l Ul, dated March 31, 1987 2)
ULNRC-1494, dated April 21, 1987 3)
ULNRC-1565, dated July 31, 1987 References 1 and 2 transmitted the Union Electric application to uprate the Callaway Plant to 3565 MWt core power level.
This letter provides the requested fluence calculation information which supports the subject submittal as discussed in a telecon between Union Electric and the NRC on September 25, 1987.
The Callaway Plant Uprating Submittal fluence calculation is based on the Westinghouse version of the discrete ordinate code DOT-3.5 which used the SAILOR cross section data set.
See Reference 3, Attachment 1 for a more complete discussion of the SAILOR cross section data set.
An R-theta calculation was performed with 18 groups above 1 MeV and Se angular quadrature.
Scattering is treated with a P approximation.
The fission ene rgy 3
spectrum accounts for anticipated changes due to burnup including increases in plutonium.
The Callaway Plant Uprating Submittal uses, in lieu of additional conservatism, plant specific core power distributions based upon measurements of Cycle 1 parameters.
Previous predictions of fluence during Cycle 1 were based on 3411 MWt and an out-in loading pattern which has inherently high leakage.
The Cycle 2 fluence calculation was based upon best estimate calculations assuming 3411 MWt and a low leakage loading pattern (checkerboard pattern).
The low leakage loading pattern will be employed at Callaway for Cycle 2 onward.
Cycles 3 and 4 are transition cores to Vantage 5 fuel and design values at 3565 MWt are used in the Uprating Submittal fluence calculations.
Cycle 5 is a f ull Van tage 5 core and is
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' based upon design values at 3565 MWt.
Cycle 5 average fluxes were modified and used to reflect actual cycle burnup for fluences beyond Cycle 5.
Since we anticipate core design changes which will only reduce leakage, no additional margin has been added to account for future design changes.
It should also be noted that this methodology was employed to generate fluence for the pressure / temperature curves as submitted in Reference 3.
If additional information is requested, please contact us.
Very truly yours,
[
Donald F.
Schnell WEK/ mat i
______m.
l STATE OF MISSOURI )
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Donald F.
Schnell, of lawful age, being first duly sworn upon oath says that he is Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.
By Schnell Donald F.
Vice President Nuclear SUBSCRIBED and sworn to before me this M M day of G4v', 1987 Sl
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y, BARBARA J. Pt AFFV NOTARY PUDUC, STATE OF MtsSOURI 22, 1989 MY COMMISSION f.xPtRf.S APRIL ST L0uts COUNTY
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I cc:
Gerald Charnoff, Esq.
-l Shaw, Pittman, Potts & Trowbridge W
ingt n D C.
bO37 Dr. J. O. Cermak CFA, Inc.
4 Professional Drive (Suite 110)
Gaithersburg, MD 20879 W.
L.
Forney Chief, Reactor Project Branch 1 U.S.
Nuclear Regulatory Commission Region III i
799 Roosevelt Road Glen Ellyn, Illinois 60137 i
Bruce Little Callaway Resident Office U.S. Nuclear Regulatory Commission RR$1-Steedman, Missouri 65077 Tom Alexion (2)
Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission Mail Stop 316 7920 Norfolk Avenue Bethesda, MD 20014 Ron Kucera, Deputy Director Department of Natural Resources P.O. Box 176 Jefferson City, MO 65102 Manager, Electric Department Missouri Public Service Commission P.O. Box 360 Jefferson City, MO 65102
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/QA Record (CA-758) j E210.01 i
Nuclear Date DFS/ Chrono D. F. Schnell J. E. Birk J.
F. McLaughlin A. P. Neuhalfen R. J.'Schukai M.
A.
Stiller G.
L. Randolph R. J.
Irwin II. Wue r tenbaecher W. R.
Campbell A.
C. Passwater R. P. Wendling D. E.
Shafer
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J. Walker O. Maynard (WCNOC)
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