ML19338D121
| ML19338D121 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 09/16/1980 |
| From: | Parker W DUKE POWER CO. |
| To: | Harold Denton, Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8009190506 | |
| Download: ML19338D121 (4) | |
Text
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DTJKE POWER COMPANY Powru Btt:1.D xo 4n Sortit Cucacu Starzt, CnAnwTrz, N.. C. asa4a mum. o. ma= =ca. s a.
September 16, 1980 Vice Pats 40ENT.
TELEPMo=C; Ang4 7C4 Setaae Peoovetion 373-4cs3 Mr. Harold R. Denton, Director
-Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. B. J. Youngblood, Chief Licensing Projects Branch No. 1 Re: McGuire Nuclear Station Docket Nos. 50-369, 50-370
Subject:
Information Request'on Category "1" Masonry Walls
Dear Mr. Denton:
Please find attached-Revision 1 of our response to the subject infoi.mation request. This letter supplements our response of July 2, 1980.
'The additional information requested on this subject requested by Mr. Robert l
L. Tedesco's letter of August 29, 1980 is being prepared and will be submitted in the near future.
Very truly'yours,
[h A,0-
%M William O. Parker,'Jr.
gW JB:ses Attachment a
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MCGUIRE NUCLEAR STATION REVISION 1 9/10/80 UNITS 1 & 2 ORIGINAL ISSUE 7/2/80
RESPONSE
to The Request for Information on the Use of Catescry I Masenry Walls 1.
Are there any concrete masonry walls being used in any of -he Category I structures of your plant? If the answer is "No" to this question nere is no need to answer the following questions.
Ceccrete masonry walls were used, on a limited basis, in the Auxiliary Suilding which is a Category I structure. Concrete masonry block walis were not used in any otner Category I structures.
si 2.
!ndicate the loads and lead ccmbinaticas to whicn the walls were designed to resist.
If load factors other than one (1) have ceen employed, please indicate their magnitudes.
Concrete masenry walls in the Auxiliary Building are not main ' load tearing ilements, ncr are they shear walls. They functicn as "IN FILL" walls.
Attacnment 1 summarizes loads and loading ccmbinations employed in the cesign of the ccccrete masonry walls.
3.
In addi; ion to complying with tne applicable requirements of the SRP Sections 3.5, 3.7 and 3.8, is there ar.y other code, such as the " Uniform Building Code" or the "Ecilding Code Requirements for Concrete Masenry Structures" (proposed by the American Concrete Institute) which was or is being ured to guide tne design of these walls? Please identify and ciscuss any exceptions or deviations frca tne SRP requirements cr the aforementioned codes.
The "Ccncrete Masonry Structures - Design and Construction" Title No.
.57-23, ACI Ccamittee 531, was empicyed in the cesign cf tne Auxiliary Suilaing concrete masonry walls.
Compliance wi th Sections 3.5, 3.7 anc 3.3 cf;tha SRP is discusses belca:
3.1 SRP 3.5-1 i
This section of the SRF discusses missiles generaticn and barrier design
- procecures etc... as follows:
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3. 5.1.1 Internally Generated Missiles Cutside Containment The McGuire FSA? identifies no postulated internal missiles cutside con-tainment. Thus this section is not applicable for the masonry block walls design.
3. 5.1. 2 Internall y Generated Missiles Inside Ccntainment There are no masonry walls inside containment.
3.5.1.3 Turbine Missiles Ali mascnry walls are interior walls inside the Auxiliary Euilding. The reaf cf the Auxiliary Building is designed to resist turoine missiles (F.ef. FSAR Section 3.5.5).
ii 3.5.1.c Missiles Ger.erated by Natural Phenomena All of the Auxiliary Building masenry walls a're interior walls and are tnerefore shielded from this particular type of missile.
3.E.1.5 Site Proximity Missiles Same ccaments as 3.5.1.4 3.5.1.0 Aircraf t Haaards This section is not applicabie to the Auxiliary Building mascr.ry vails as explained above) and thus was not a consideration in the des;gn of the concrete masonry walls.
3.2 SP.P 3.7 Secticn 3.7 of the McGuire FSAR discusses :ne seismic analysis, ger.eration cf ficcr response scectra etc... of all Categcry I structures. The seismic analysis of tna Auxiliary Building mascnry wails is outlined in res;ccse to que: tion #4 belcw.
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.i Ali of tr.e Auxiliary Building concrete masonry walls are "IN FILL" walls.
They are located in the interior of the cuilcing. All walls are r.uclear 2
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i All nuclear safety related masonry
. safety related viith very few except ons.
walls are~ reinforced both horizontally and vertically. The non-safety related walls are located in' the shower areas and around stairwells with the. exception 1
of the Battery Room. This room contains 354 linear feet of grouted, single i -
wythe (8 foot high) walls. reinforced horizontally at every course with Durowall.
The non-safety masonry walls have no. safety equipment attached to them, nor t'
does there exist -any-_ safety piping and/or equipment in their proximity. Loads loading combinatior.s and applicable design codes for the design of the concrete masonry walls are included in Attachment.1.
4.
Indicate the method that you used to calculate the dynamic forces in casenry walls due to earthquake, i.e., whether it is a code's method such as Uniforn Building Code, or a dynamic analysis.
Identify tne code and its effective date if the code's method has been used.
Indicate the input motien if. a dynamic analysis has been performed.
4 Earthquake loadings are considered in the design of the concrete mascnry walls (See Attachment 1). The.asonry walls are designed using the results 4
of tne seismic analysis of the Auxiliary Building as outlined in the McGuire FSAR (Section 3.7).
The walls are assumed to be rigid and the building accelerations at the masonry wall supporting ficor are used with an added desien factor of 1.375. The design factor is utilized to account for diTferent boundary conditions and physical properties.
5.
Ecw were the masonry walls and the piping / equipment supccrts attacned to tham designed?. Provide enough (numerical) examples including details of reinfcrcement and attachmer.ts to illustrate the methods and procedces used to analyze and design the walls and the anchors needed for supporting
. piping / equipment (as applicable).
The Auxiliary Building concrete masonry walls and the piping /equiprent supports j.
attached to them are designed utilizing scund structura,1-engineering techniCues.
Loads and load cctbinaticns employed in the design of the masonry walls, as well as' applicable building codes are curlined ~in Attachment #1. A very small amcunt of piping /equipmer,t-supports, e.g. approximately 14 piping supports, are actually. attached to the masonry walls. The reinforcing details and methods of subccrtina a typical wall are included in Attachment 2.
Attacnrent #3 shows a nierical~ evaluation of a masonry wall for a piping support which is attached to it.
Also included'in Attachment #3 are some typical pipe sucport attachments to matonry walls. ' Mo'expansien; anchors were used in attaching safety related alping supports. to masonry walls.
i 6.
Frevide plan and elevation views of the plant structures showing the iccation cf all casonry walls for your f acility.
Attachment #4. includes a series of drawings shcwing the locaticn cf mascr.ry walls witnin theluxiliary Building.
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