ML19339C818
| ML19339C818 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 11/05/1980 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8011190572 | |
| Download: ML19339C818 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION v
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E WASHINGTON, D. C. 20555 t
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b Docket Nos.:
50-369 and 50-370 l?
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Duke Power Company ATTN: Mr. William 0. Parker, Jr.
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Vice President - Steam Production e
y P. O. Box 33189 0
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~J 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
SUBJECT:
CATEGORY I MASONRY WALL DESIGN (MCGUIRE NUCLEAR STATION, UNITS 1 AND 2)
We have reviewed your letter of September 23, 1980 regarding Category I Masonry wall design and find that we require some additional information which is described in the enclosure.
We request that this infonnation be provided no later than November 14, 1980.
Sincerely, k.
I R. L. Tedesco, Assistant Director for Licensing Division of Licensing
Enclosure:
As stated j
cc:
See service list
!B01110 0372 g
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION ON MC GUIRE MASONRY WALL DESIGN STRUCTURAL ENGINEERING BRANCH (REF:
DPC0 LETTER DATED SEPT. 23,1980)
Docket Nos. 50-369, 370 8.
In your responses to questions 3 and 4 it is stated that because of your use of assumptions such as rigid wall and simply supported;end conditions together with a design factor of 1.875, no rigorous response spectra type of analysis is required and it is reasonable to conclude that the masonry wall design approach is reasonable, adequate and conservative. Your 1
conclusion is not so obvious to the staff. From attachment 7, for a structure or structural element having a period of 0.08 second the response acceleration is found to be 0.5 (broadened) vs. 0.16 for zero period. The factor is 0.5/.16 = 3.125 vs. 1.875.
In the reinforcing details provided (attachment #9) especially at corners, the reinforcing steel is placed either on one face or at the middle of the section.
In view of these observations it is requested that in order to substantiate your conclusion a rigorous response spectra analysis be performed, taking into consideration such factors as interstory drift, effect of upper floor response, actual support condition, etc.
9.
In your response 4(a) it is stated that for collar joints in multiple wythe walls, mortar was applied to adjoining faces of both wythes' and pressed finnly to insure full bond between wythes, thus constituting a shear transform mechanism between wythes. From your computation check the resulting shear stresses due to the inertial loads are found to be about 11 psi.
Since shear in collar joints is different from shear in other joints, indicate what the allowable value for such, shear is and how it is established.
10.
In your response 6(a) in discussing the effects of the combined action of local and global loads, it is stated that local loads are considered as global in-plane loads only when they are of significant magnitude.
Indicate your criterion for "significant magnitude".
Mr. William O. Parker, Jr.
Vice President, Steam Production Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28242 cc:
Mr. W. L. Porter David Flesichaker, Esq.
Duke Power Company 1735 Eye Street, fi. W.
P. O. Box 2178 Suite 709 422 South Church Street Washington, D. C.
20006 Charlotte, North Carolina 28242 Richard P. Wilson, Esq.
Mr. R. S. Howard Assistant Attorney General Power Systems Division State of South Carolina Westinghouse Electric Corporation 2600 Bull Street P. O. Box 355 Columbia, South Carolina 29201 Pittsburgh, Pennsylvania 15230 Office of Intergovernmental Relations Mr. E. J. Keith 116 West Jones Street EDS Nuclear Incorporated Raleigh, North Carolina 27603 220 Montgomery Street San Francisco, California 94104 County Manager of Mecklenburg County 720 East Fourth Street Mr. J. E. Houghtaling Charlotte, North Carolina 28202 NUS Corporation 2536 Countryside Boulevard U. S. Environmental Protection Agency Clearwater, Florida 33515 ATTN:
EIS Coordinator Region IV Office Mr. Jesse L. Riley, President 345 Courtland Street, N. W.
The Carolina Environmental Study Group Atlanta, Georgia 30308 854 Henley Place Charlotte, North Carolina 28207 f.l Mr. Tom Donat Resident Inspector McGuire NPS 3
J. Michael McGarry, III, Esq.
c/o USNRC Debevoise & Liberman Post Office Box 216 1200 Seventeenth Street, N. W.
Cornelius, florth Carolina 28031 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. Lueb'ke Atomic Safety and Licensing < Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Cadet H. Hand, Jr., Director Bodega Marine Lab of California P. O. Box 247 Bodega Bay, California 94923
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