ML20070A748
| ML20070A748 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 01/21/1991 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ULNRC-2356, NUDOCS 9101280182 | |
| Download: ML20070A748 (3) | |
Text
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Union Eimernic January 21, 1991 U. S. Nuclear Regulatory Commission ATTN:
Document Control Desk-i Mail Station ~Pl-137; i
Washington, D. C.
20555 i
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Gentlemon:
ULNRC-2356 DOCKET NUMBER 50-483' l
CALLAWAY PLANT-10CFR50.46 ANNUAL REPORT-ECCSrEVALUATION MODEL REVISIONS-
Reference:
ULNRC-2141 dated January 19, 1990
]
The referenced-lottor provided'last year!s report of omergency coro cooling system.(ECCS) modci revisione as; they applied;to Callaway Plant.
Since the: format'and content,of the information to bo,providsoL:n the reports is.not clearly specified:in 10CFR50.46,fa wide variety of approachos has boon used by licensoos; Westinghouso.has schedulod a mooting with'tho NRC staff in late January.
1991 to discuss tho' format and contont4 of'roquired.
reports.
Information obtained from'the-_ mooting will:
influenco our subsequent reportito NRC on ECCS model.
-I ovaluation changes.
It is anticipated wo'willLprovido tho required report.by the end of Februaryi1991.
i Also in tho'roforenced letter wo^ discussed modifications to thc = small break :LOCA modol: (NOTRUW) which are expectod.to'rosult in a decrease in tN, peak clad temperature (PCT)'
'Although the modificat1>ns.
i indicatod a' reduction'in the PCT,,Westinghouso;:onsidorod the results potential 1y significant under the reporting-i requiroments.of.'10CFR$0'.46,0and isicontinuingitheir?
investigation.
Wo w111 provido a-follow-up report on.tho_.
results by the end of February 1991.
If thoro are 'any questions = ~witih> respect lto this.
A please contact us.
Very truly yours,_
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l DonaldLF.LSchnell-
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cc:
T. A. Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 2300 N. Street, N.W.
Washington, D.C.
20037 Dr. J. O. Cermak CFA, Inc.
4 Professional Drive (Suite 110)
Gaithersburg, MD 20079 R. C.
Knop Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Reg.1on III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Bruce Bartlett Callaway Resident Office U.S. Nuclear Regulatory Commission RRtti Steedman, Missouri 65077 M. D. Lynch (2)
Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory commission 1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20052 Manager, Electric Department Missouri Public Service Commission P.O. Box 360 Jefferson City, MO 65102
bec D.
Shafor/A160.761
/QA Record (CA-758)
Nuclear Date i
'E210.01 DFS/ Chrono D.
F.
Schnell J.
E. Birk J. V. Laux M. A. Stiller G.
L. Randolph R. J.
Irwin H. Wuertenbaecher W.
R._ Campbell A. C.
Passwater R. P. Wendling-D. E.
Shafer W.
E. Kahl O. Maynard (WCNOC)
H. P. Goel (Bechtol)
T. P.
Sharkey NSRB (Sandra Auston)
G. G. Yates l
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