ML19322E702
| ML19322E702 | |
| Person / Time | |
|---|---|
| Site: | 07105939 |
| Issue date: | 02/20/1969 |
| From: | King W GENERAL ELECTRIC CO. |
| To: | Beth Brown US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19322E697 | List: |
| References | |
| NUDOCS 8004020137 | |
| Download: ML19322E702 (12) | |
Text
-.
OO February 20, 1969 O
Mr. 3 P. Brown Irradiated Fuels' Branch Division of Materials Licensing U.S Atomic Energy Commission Washington, D. C.
20545
Dear Blake:
Enclosed are pencti changed drawings on the remaining containers designating jacket tie down bolts. Please note that one drawl:y, (No. 106D3981) repre-seats three different containers. The official modifications to the applications C) are in the mail to Mr. Chitwood, excluding the mudified drawings. These will
' ' v' be forwarded when they' become available.
As requested, an analysis was performed according to the data sheets attached.
Both the Models 1500 and 700 containers were evaluated as being'most severe' cases. As the analyses show, the resulting forces acting on the jacket and pallet structures are less than the yield strength of the rnaterials used in these members.
Sincerely, Walter H. King g
Administrator Licensing y
Vallecitos Nuclear Center l
WHK: msg l
Enclosures l
1 0
- .o.
i: oie. A s aiun R s s Ti m o st A. TzuCK. EED %/tTH di ATtc LOAD 6 Ci:
106. 56, w 2C, A5 6+Dw/tsh N!o PAZT OF TM 6A-54 C A>J YtELD UdtE55 Tt4E vJHOLE N/EizT\\ CAL. Fo22 L-5 COWCEtsWAi cD oW otslE ED6i:
CE: TnE PALLE T lts! WRtGM 3
CASE.
THE PALLET WouLD SELD.
THis C.ALI OWLY Occ_L.\\R ii= THE CABLES FF ^K ArslD allow!
THE d.AsK To ROTAi ci. THE CASLES W \\LL. NiOT ERSAK 3 AMO ME PALLET WILL mot '(iELD Uw1DE.g TMESE L0 ADEtsi625 o "ned Fesc.e5 M $t i a
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WHER C. 6 15 LcADED As S H O W bl FLMD tF P
WILL E'MO PALUE.T
~
lF F
15 Fad.Tud i:oRGE R]R p =
0.~74 AWD T
is t c45iod Itd CABLE F=p (Zq + Tsia 45")
6og - F)/g,4g.
T=
F =,s< ['Z g + (log-F) i w 46 *)
F= g (23 + (to g-1:))
F =p [Zg + log - F )
\\
1500 SERtlES cov% vGe (l+p.)F = l2p g s c, is, coo (b s e
q F3
% 600 lb5 T"=
ho g - F) '
O 707
(\\so,000
%,50 o)/ 0007
'T =
/
T=
104.000 bs C2.,coe ib s T=ce w
i cm, CA.i3LE WodT TSReox So ASSEMS q C/StT 12cLL o9 s
'RcTAn.
So y F_.E TIC ti L FDECE wILL C,c N To UdiFet?H COMPRE65 td.16 OF 7
~dFAMG
'P NJ EET.
~-c 2 C E r
P=
h +
tsiW 46 103,50o lbs co.opre.essted P=
'30, oc o t '73,500
=
700 SErhE.5 Cou m t use_
7 l
ss' b
T M cTio W 45-Il
~
Q
^
TQg ggg h
F is T 9 e v E r n c. A t. gsacneJ FbECE WNiCH in ydtPngty as i xtsu i c o o/se Tda Aea a=
nae mSE OF' TNE mu_en 2.
'nf5 CA6d VX = g 3-A i.6 FouMD tu HAwg M.E. HA.ubacM mse 3 34 FDR GTA-Tic CoMidt nod 6 4
P (6
FP-.iGTIOM
- cPN
~6ETsJEEd PAU 5.T $@
r-
'Teu ct' EsDo
8 g 8,9 e
700 seines cosm oMGk F= p [2g +Tsw As')
r-cos-F34 o.
F =p (zg + tog-F) h tj<. ) f' = ( 2 A( = 0. M S=
2.4, 000 \\ h s -
l ~74 i= = 12 [.7 4) (g, oco) t2(o.M)(% coa),
)ZZ, 4co (ks F=
I. A l
T' l O % - F-O. ~7 07 T-74 0 r 0 00 - l '2.2.,(CO,
I L fo, 5 0 0 O ~} O'7 na i
c f e.ar 7:
83, soo 6 swe.toAo CASLE w29r 3Ri.A4.,
"So ASSEMBLY GA.QY 2.oLL OR R;7N c e
\\t E R T\\d a L.
i: C R 4 =_.
\\ viLt. C, J t 4-a C o M P C B r.; 6 i O A
.m' ".1M 4.
- 49 000 + i I 7, Go o ' l Gi, /o 00 b s C ) ~' 7'f.
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e O 4*
O EXHIBIT B BOLT ANALYSIS 4
GENERAL ELECTRIC SHIELDED CONTAINER MODEL 1500 The analytical method presented in the Container Drop Test Analysis
"~
following pages was used in determining the size and number of carbon steel bolts required to hold the protective jacket to D-d the rest of the packaging for each of the GE contatoer applications now being evaluated by the AEC.
t Given: 1.
Container We ight............................
15, 00 0 lbs.
2.
D ro p He i g ht.................................
30 ft.
3.
Bolt Properties:
Carbon Stl. Grade 5 or equivalent Y ie ld Str e n gth............................. 74, 0 0 0 lb s. / Ln 2
Shear Yield Strength........................ 5 5, 5 00 lbs. / in 4.
L o ad in g at Im p a ct...........................
130 G's Problem:
Deter:ntne the size and number of carbon steel bolts required to hold the package together under conditions generated by a 30 foot drop test striking the test aurface at the worst possible I
pos ition.
Model:
l 1O O
FIGURE 1
Salutten:
The worst caso drcp tact occurs wh2n the containne to dropped in the position shown in Figure 1*.
After Initially striking the pallet edge and deforming it upwards, the container will strike the test surface with the center of gravity directly above a point on the bolt circle of the jacket flange.
The maximum force that can be exerted on the edge of the pallet la that force necessary to yleid the pallet. Refer to Figure 1 and Figure 2.
O-W = Pallet Width FIGURE 2 IM
= O b
(2) 22 l 1 7 YF W
(}
Fb b
where:
Pallet thickness, y in.
t
=
59,000 lb/In s yp
=
W
=
60in.
2 eyp Wt y
1 4L g
59,000 (60) (} }
F
=
g 4 (10)
F
=
22,150 lb.
3 d
F
,5yu W t
=
2 4L 2
.O
- 59. 000 (60> <+ >2 r
=
2 4 (40)
F
=
5,530 lb.
2 See, also, Appenciix 1.
(1) Flugge, W., Handbook of Engineering Mechanics, McGraw-Hill, New York, N. Y. (1962), p. 49 -
O
-2
Thf maximum ferco rsquired to ytald tha pallst tbsut the edge of the jacket is 22,150 lb. Notice that the horizontal bolt at C
(Figure 1) is loaded only with 5,530 lbs. Any loading on the vertical hold down bolts is insignificant at this stage.
n.
The container tnoves downward making impact at point B
In the process, energy is expended in (1) crushing the energy absorption angles, (2) in tending to shear the tie block and.
iO
==11 > w tas a 'h h=rt
= 18 its.
a (3) t 1 at s *s-vertical bolts holding the jacket to the pallet.
Since the center of gravity is directly over the point of impact, no rotacional momentum wilt occur.
The impact force will exert a shearing stress on the collar and tie-block welds. In order for the cask to exert a shearing force on the vertical hold-down bolts, it must first fall the collar and tie-block welds allowing the cask' to contact the jacket. However, O
we witt nestece sur ferce en the weids. and censider the she rtn2 force acting only on the vertical bolts.
The F force will impart on1y a small tensile load on the ver-y tical bolts at impact. After 1:npact, the container is free to rotate either onto its pallet or onto its side. These minor tensile stresses were neglected in the analysis.
The shearing force, F, (see Figure 1) is equal to 920,000 lbs.
g F,
(No. of G's) (Weight) Sin 0
=
F, 130 (15,000) (Sin 28.1 *)
=
F, 920,000 lbs.
=
I O,
2-
'A ni rsquires ons aron to rootoc cas coscitag torco sm A
=
F
=
F
=
900,000 K
0.75 Y.5.
0.75 (74,000)
- 16. 67 In.2 A
=
A 1-1/2 diameter bolt has a shaft area of 1.765 in.
Ten 1-1/2 diameter bolts are sufficient.
920,000 j
O' 3
s 17.66 52,000 lb/in.2 S,
=
i For the 1500 series cask assembly hold down system, use 10 1-1/2 6 UNC x 2A x 2 in. long, Grade 5, carbon steel bolts.
Note: After impact at Point B, the assembly will fall onto its pallet or its side.In e ither case, the forces generated on O_,, ;
the bolts will be.ne.gugtble.
/
,O I
I e
, APPENDDC 1 O
DISCUSSION:
The container system was analyzed la three different drop test positions.
The three positions were:
Position 1.
Assembly striking the surface with the center of gravity O,
atre *tv as e 4 sortz tat a ia a=wn soit (i.e. * ** *se pallet hitting 28 degre,es above horizontal.
Position 2.
Assembly striking with the pallet in the horizontal position.
Position 3 Assembly striking with the pallet in the vertical position.
In order to provide for a conservative analysis, many energy absorbing aspects of the container systecs were neglected. The following effects were neglected:
1.
Deflection and shearing of the pallet collar and tie block welds.
Z.
Friction force between the pallet plate and jacket flange e-caused by preloading the vertical bolts, which would help '
resist shearing forces through the bolts.
3.
Energy absorption in bending the pallet was not considered in the worst case.
4.
The strengthen effects of the eight gussets (font per side) were ignored in this analysis.
Position 1.
This is the worst case condition and the maximum stresses were gene.- ;sd in the vertical bolts.
Position Z.
The container system was analyzed in this position and the stresses generated in the vertical bolts were less than 5,000 lb/in.
O 5-
recstt:n a.
A na consamor oy ssen wco ennty==u wasa was p.ases sa ua=
vertical position and tbs maximum shearing stresses gen-erated in the vertical bolts were less than 9,000 lb/in.
CONCLUSION:
Ten - 1 1/2 Inch diameter 6 UNC - ZA x 2 inch long bolts will hold the jacket and pallet assembly together through a 30 foot drop test.
O 6
0 O
6.
g O
'$# A EXHIBIT C CRITICALITY ANALYSIS i
i f
f f
f
<. e,....
G E N E R Ai. Ch E LE CTR IC
- * "^"
ENERGY GENERAL ELECTRIO COMPANY. VALLECITos NUCLEAR CENTER, VALLECITOs RoAo DIVISION PLEAsANTON. CALIFORNIA 94566. Phone (415) 862 2211 P.O.
Drawer B May 3,1976 Mr.
C. B. MacDonald, Chief Transportation Branch Division of Fuel Cycle and Material Safety Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Ref. 1)
License SNM-960 Docket 70-754
- 2) NRC Certificate of Compliance # USA /5939/B( ).
Dear Mr. MacDonald:
The General Electric Company, Vallecitos Nuclear Center (VNC), has for several years transported the Model 1500 Series shipping container under Amendment 71-50 to License SNM-960 and Certificate of Compliance # USA /
5939/B().
The fissile content of shipments in this container has been limited to 15 grams or less.
VNC now requests that the fissile li rits be changed to 300 gms Pu or 500 gms U-235 or a prorated ratio of the two such that:
Grams U-235, Grams Pu. <
l.0*
500 300 The cask would be shipped as Fissile Class III.
The Density Analogue Method as described in Section 5.4.4 of the SNM License Application for VNC, Docket 70-754, April 10,1966 was used to calculate the number of containers critical. Although this method is normally used to calculate the number of units for transport under Class II, it was used in this case to demonstrate that two casks together would remain suberitical.
Of course, a single cask containing the 300/500 gram limit would be suberitical under all circumstances.
l l
. a 9. s.
GEN ER AL h ELECTRIC
~
Mr. C. B. MacDonald May 3,1976 The material was assumed in the calculation to be either pure Pu-239 or U-235. The fissile material was homogenized with water to fill the volume of the cask cavity (7" in diameter by 25" in length).
This was done to permit wet loading, if necessary.
Criticality parameters were taken from TID-7028, June, 1964.
The calculations indicate the following safe numbers of containers:
Material Quantity Safe Number Pu-239 0.3 Kg 22 U-235 0.5 Kg 115 This calculation and approach is consistent with that used for the approved G.E. Models 100 (Cert. # USA /5926/B( )F), 200 (Cert. # USA /5971/B( )F), and 1600 (Cert. # USA /9044/B( )F) containers.
Because of operating considerations, VNC requests the NRC to forward the necessary revised Certification prior to July 1,1976.. If your staff has any questions concerning this application, please contact this office at any time. Thank you.
Sincerely, s
G. E. Cunningham Sr. Licensing Engineer gb D
W8 'en 6,,
e EXHIBIT D LEAK TEST DATA
. e.
Je Model 1500 Qualification Test The new 1500 seal (G.E. Drawing Number 12904690).was tested to determine its ability to seal at 15 psig to a sensitivity of 10-3 ata cm /sec.
3 The seal was installed on the 1504 cask and the lid bolts tightened to 60 20 feet pounds of torque.
The cask was then lowered into the RHO pool
( <2" of water covering the lid). The cask was pressurized to 15 psig and held for 15 minutes.
The seal area was then inspected for bubbling.
None was detected.
It can therefore be concluded that the model 1500 seal is capable of sealing at 15 psig per ANSI 14.5-1977(I) to a sensitivity of 10-3 atm cm /sec.
3
/)
// Mt4 R. G. Sears Equipment Engineering vec (1)
American National Standard for leakage tests on packages for shipment of radioactive materials.
i 1
15.639
-