ML20133E704
| ML20133E704 | |
| Person / Time | |
|---|---|
| Site: | 07109192 |
| Issue date: | 08/27/1985 |
| From: | Jerome Murphy ANEFCO, INC. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 25702, NUDOCS 8510090505 | |
| Download: ML20133E704 (4) | |
Text
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LNEFCQ ANEFCOINC. l %?som oe877 203.233 33s8 August 27, 1985 RETURN TO 396-SS U.S. Nuclear Regulatory Commission
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Transportation Certification Branch Division of Fuel Cycle and Material Supply Washington, D.C.
20555 Attention:
Charles E. MacDonald Mail Stop 396 SS 3
35
Subject:
Model AP-300 Type A Package g
Docket No. 71-9192 3
5
Dear Mr. MacDonald:
i Disregard page 2.4-14f which was sent to you on August 23 and replace the enclosed page 2.4-14f. revision 7.
Inadvertently an incorrect hof.X was inserted in the formula.
The correct number results in a greater safety factor.
Thank you for your cooperation and time.
Very truly yours, ANEFCO Inc.
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The shell material can resist the stresses due to the maximum tie-down circumferential moment with a factor of safety of 1.23.
Stresses Resulting From the Longitudinal' Moment, M g
The circumferential stresses [/ at Point B are obtained as follows:
The above steps are repeated using the appropriate graphs from the reference.
Nj Mj 0.015 From Graphs:
= 3.0
=
M /R,p L M i
g h*
(
L 1183.5
(.0) (41.1875)2(1.25)(.29)
=
M(/R,2y R,2Ty T
4 l
N4 j
p p = 5.77 ksi l
4 1
6(1183.5)
=
=(0.015) 2 (41.1875)(.29)(1.25)'
P /R,p R
pT T
g m
6M4=
5.71 ksi 2
T
= 5.77 + 5.71
= 11.48 ksi The longitudinal stresses 6 x at Point B are obtained as follows:
l The above steps are repeated using the appropriate graphs from the reference.
N M
1*4
.025
=
From Graphs:
y jp g
p 2
F /R k
1383.5 x
x
" 1*4 y=
P /R,2p R,2pT (41.1875)2(.29)(1.25) g 1
N[
= 2.69 ksi i
2.4-14e Revision 7 - 8/22/85
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L
- '~
6(1183.5
= 0.25 (41.1875)(.29)(1.25)2
=
T
'L!m E R,E T 6M
= 9.51 ksi 2
T
{
= 2.69 + 9.51 = 12.2 ksi The shear stress resulting from the circumferential load at Point B is:
V
= 4.82 ksi y/
" 4C T (4
2 0)(1.25) y The combined stress intensity at Point B is calculated:
_vz
+4[x4
+
(Q 4)
S = b (6j + 6x
- v,
~P S = h (11. 48 + 12. 2
+
(11.48 - 12.20)
+ 4(4.82)2_
S = 16.67 ksi
=3*
= 2.28 (FS)Y 16.67 The shell material can resist the stresses due to the maximum tie-down longitudinal moment with a factor of safety of 2.28.
Therefore, the governing stress in the shell resulting from tie-down loads is the combined stress intensity at Point A due to the circtunferential moment.
The stress calculations assume that there is no support from the inner shell or the lea 6 between t2e shells when the maximum tie-down loading is applied.
The factors of safety calculated are therefore conservative.
I i
i 2.4-14f Revision 7 - 8/22/85
.