ML19344D730
| ML19344D730 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/09/1980 |
| From: | Baer R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8004280072 | |
| Download: ML19344D730 (3) | |
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[,pmauq(o UNITED STATES g
y ) ) 3,/(/Xg NUCLEAR REGULATORY COMMISSION l
WASHINGTON, D. C. 20355 n-APR 0 91980 Docket Nos. 50-369 and 50-370 Mr. William 0. Parker, Jr.
Vice President, Steam Production Duke Power Company P. O. Box 2178 42? South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
SUBJECT:
LOCA ANALYSIS - COMBINED 10-INCH AND 6-INCH BREAK (McGuire Nuclear Station, Units 1 and 2)
We have reviewed the qualitative evaluation of the combined failure of a 10-inch accumulator line and an impinged 6-inch hot leg injection line which was pro-vided in your March 22, 1979 letter.
It is not apparent that the qualitative evaluation of combined 10-inch cold leg and 6-inch hot leg breaks addresses the uncertainties associated with core flow during this event for a UHI plant.
It is not clear that the venting effects mentioned in the analysis would be beneficial when considering the possibility of core flow stagnation. Since we cannot draw a conclusive assessment from the qualitative evaluation to detemine that the postulated two-break event is not limiting, we require that you provide a sensitivity analysis of a 10-inch cold leg split break in combination with a 6-inch split break LOCA.
..d We request that this information be provided no later than May 9,1980.
Sincerely, (QM{.t'. %
Robert L. Baer, Chief Light Water Reactors Branch No. 2 Division of Project Management ccs: See next page i
f *04280 6 ff
jJ Mr. William O. Parker, Jr.
l Vice President, Steam Production Duke Power Company i
P. O. Box 2178 422 South Church Street Char 1otte, North Carolina 28242 cc:
Mr. W. L. Porter Duke Power Company P. O. Box 2178 422 South Church Street Char 1otte, North Carolina 28242 Mr. R. S. Howard Power Systems Division Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. E. J. Keith EDS Nuclear Incorporated 220 Montgomery Street San Francisco, California 94104 Mr. J. E. Houghtaling NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Mr. Jesse L. Riley, President The Carolina Environmental Study Grcup 854 Heniey Place Charlotte, North Carolina 28207 J. Michael McGarry, III, Esq.
Debevoise & Liberman 1200 Seventeenth Street, N. W.
Washington, D. C.
20036 Rober t M. Lazo, Esq., Chairman Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Emmeth A. Luebke Atomic Safety and Licensing Board U. S. Nuclear Regulatory Coninission Washington, D. C.
20555 Dr. Cadet H. Hand, Jr., Director Bodega Marine Lab of California P. O. Box 247 Bodega Bay, California 94923 a
'O. -.
Mr. William 0. Parker, Jr.
APR09$N50 cc: David Flesichaker, Esq.
1735 Eye Street, M. W.,
Suite 709 Washington, D. C.
20006 Richard P. Wilson, Esq.
Assistant Attorney General State of South Carolina 2600 Bull Street Columbia, South Carolina 29201 d
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