ML20033D344
| ML20033D344 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 11/30/1981 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8112070551 | |
| Download: ML20033D344 (7) | |
Text
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THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P o. Box 5000 e CLEVEL AND. ohio 44101 e TELEPHONE (216) 627-9800 e ILLUMINATING BLDG.
e 55 PUBLICSoVARE ing Best Location in tM Nation Dafwyn R. Davidson VeCF PHESIDENT
$YSTE M ENGINEERING AND CONSTRUCTION p bilj November 30, 1981
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Mr. Robert L. Tedesco k
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1 Assistant Director for T.icensing
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Division of Licensing e
U. S. Nuclear Regulatory Commission e g
/p ?g gj Washington, D. C.
20555
^ <;g, Perry Nuclear Power Plant Docket Nos. 50-440; 50-4hlj
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i Response to Request for Additional Information -
Containment Systems
Dear Mr. Tedesco:
This letter and its attachment is submitted to provide an additional draft response to the concerns identified in your letter dated August 14, 1981 in regard to Containment Syst.uns.
This supplements our previous submittal dated October 1, 1981.
It is our intention to incorporate these responses in a sub-sequent amendment to our Final Safety Analysis Report.
Very Truly Yours, Dalwyn R. Davidson Vice President System Engineering and Construction DRD: mlb Attachment cc:
G. Charnoff, Esq.
M. Dean Houston NRC Resident Inspector 6}
s di 8112070551 811130 PDR ADOCK 05000440 A
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480.5 For each subcompartment analyzed, provide the following information:
a) Describe the nodalization sensitivity study performed to determine the minimum number of volume nodes required to conservatively predict the maximum pressure load.
acting on the compartment structure. The nodalization sensitivity study should include consideration of spatial pressure variation; e.g., pressure variation circumferential1y, axially, and radially within the-compartment.
Describe and justify the nodalization densitivity study performed for the major component j
supports evaluation, where transient forces and moments acting on the components are of concern.
4 b)- Discuss the manner in which movable obstructions to vent flow (such as insulation, ducting, plugs, and-seals) were treated. Provide analytical and experi-j mental justification' that vent areas will not be.
partially or completely plugged by displaced objects.
Discuss how insulation for piping and components was considered in determining volumesJand vent areas.
c). Provide the projected area used to calculate these loads and' identify the location of the area projections-~
on plan and section drawings in the. selected coordinate system. This information should be presented in.such.
a manner.that confirmatory evalua' ions of the loads ands t
moments can be made.-
4 d) Provide the peak and. transient loadings on-the major components'used to establish the adequacy of the 'sup-ports design. This should include ~the' load forcing
l-functions (e.g... f (t), f,(t), fy (t)): and-transient moments (e.g., M (t), Mx. (t),- My (t)) as re- -
solved about a specific,-' identified ~ coordinate. system..
me% A
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o 480.05
Response
The response to items a) and b) is provided in revised Section 6.2.1.2 c.
The contribution to the total design force or moment loading from any individual node may be evaluated using the dimensions and coordinate system provided in Part d), plus the design nodal pressure information provided in Tables 6.2-12, 6.2-13, and Figures 6.2-29 and 6.2-30.
d.
Force and moment components on the biological shield wall were evaluated based on an inside diameter of 13'-9 ".
The coordinate system is as shown in Figure A.
The moment arm reference elevations are-shown in Figures B and C.
Resultant shears and moments for the design loading time steps are given in Figure D.
WW*
i 1
s
...m
...u.
e
_,,,.ee**
1 nX2 X3 (90')
XI (180')
FIGURE A RIGHT HAND CO-ORDINATE SYSTEM UTILIZED FOR BIO WALL ANNULUS PRESSURIZATION LOADINGS
4 VOL.
NODES 4
43,44,45,46, 47,48,49
~
1r i
JL i
R 40,41,42 P
36,37,38,39, a
u 29,30,31,32, P
R 33,34,35 A
1 u
Jk 22,23,24,25,'
P
, P THRUST R
26,27,28 a
n u
d i
R 19,20,21
, P
'g 15,16,17,18, n
p "o
, r st L
8,9,10,11, 3
R p
k 2
12,13,14 n
mi ir g
a
=
L 5
y 1,2,3,4,5,6,7
%p
. n
'a.
r R,r u
u v
v o
v ir EL. 610'-6" n
0
't FIGURE B FORCE MOMENT ARMS ON BIO WALL FOR ANNULUS PRESSURIZATION DUE TO FEEDWATER LINE BREAK
1 YOL.
NODES
,d P
t g
26,27,28,29 n
,r J6 P
E 20,21,22,23 w---
0 a
~
,e JL
=
P "a
16,17,18,19 4----
n 1r Jl l
p
=
11,12,13,14,15
'g 2
9
,r 3
ik "o
, 6,7,8,9,10,h (25)
P 4
=
4---
N 5
E
,P THRUST u
- q d
e.
m 1,2,3,4,5,M (25) d,
=
n EL. 610 '-6 "
,r 0,r
,r 1r 1r 1r 1r
'r _
d E
ir FIGURE C FORCE MOMENT ARMS ON BIO WALL FOR ANNULUS PRESSURIZATION DUE TO RECIRC. DISCHARGE AND SUCTION LlHE BREAKS
l i
5 SHEAR MOMENT TIME STEP BREAK (KIPS)
(IN-KlP)
(SEC)
FEEDWATER 2713.5 1,123,300.0 0.500 RECIRC. SUCTION 1380.5 286,137.0 0.024 RECIRC. DISCHARGE 1865.4 385,443.0 0.024 f
1 i
l 4
5 l
FIGURE D RESULTANT 810 WALL FORCES AND MOMENTS DUE TO ANNULUS PRES $URlZATION r-e
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