ML19345C090
| ML19345C090 | |
| Person / Time | |
|---|---|
| Site: | 07105768 |
| Issue date: | 10/28/1980 |
| From: | BABCOCK & WILCOX CO. |
| To: | |
| Shared Package | |
| ML19345C087 | List: |
| References | |
| 17816, NUDOCS 8012030863 | |
| Download: ML19345C090 (5) | |
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- TABLE OF PAGE REVISIONS AND ADDITIONS 1.
Page Replacement a.
Replace existing page 1-2 with the revised page 1-2 dated October 28, 1980.
b.
Replace existing page 2-1 with the revised page 2-1 dated October 28, 1980.
c.
Replace existing page 3-2 with the revised page 3-2 dated October 28, 1980.
2.
Page Additions a.
Add the new page 3-3 dated October 28, 1980.
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17816 8012030M3 i
Total contents not to exceed 250 pounds, with the U-235 content not to exceed four (4) kilograms.
1.2.2.2 Uranium compounds which will not decompose at temperatures 0
up to 750 F.
Uranium may be enriched to a maximum 5 w/o in the U-235 isotope. The maximum H/U atomic ratio, con-sidering all sources of hydrogenous material within the inner container shall not exceed 1.5.
Total contents not to exceed 250 pounds, with the U-235 content not to exceed five (5) kilograms. Four (4) steel drums containing not more than 1.3 kilograms.U-235 each shall be packaged in the shipping insert within the inner container as shown in Westinghouse Electric Corporation Sketch SKA-252-1 (Appendix F to this application) and Drawing C7108010. The steel drums shall be constructed in accordance with U. S. Military Standard MS 24347 with a maximum ID of 8-1/2" and a nominal height of 15.4".
1.2.2.3 Uranium oxide pellets, enriched to a maximum of 4.0 w/o in the U-235 isotope. The maximum H/V atomic ratio, considering all sources of hydrogenous material within the inner container, shall not exceed 3.0.
The contents described herein shall be contained in either:
a.
Metal inner containers having 9-3/4_" diameter, or b.
The inner container shown on NUMEC Drawing 10-F-676 (Appendix D to this application).
Total contents not to exceed 250 pounds, with the U-235 content not to exceed 4.0 kilograms.
The inner container shown in Babcock & Wilcox Drawing 10-F-771 shall be secured with twelve (12),1/2" diameter bolts only when utilizing method b. above.
1.2.2.4 Uranium oxide enriched to a maximum 4 w/o in the U-235 isotope. Chemically-bound or physically-bound water in mixtures is permitted.
Slips or slurries that exhibit a visually discernible liquid second phase are prohibited.
Total contents not to exceed 200 pounds, with the U-235 content not to exceed 2.95 kg. The contents shall be contained within two (2) 9.75 inch diameter by 12 inch high sealed metal cans. Empty metal cans will be used to make up the remaining space within the inner container.
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1-2 October 28, 1980
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CHAPTER 2.0 STRUCTURAL EVALUATION 2'.l Structural Design-This section provides the. structural design and evaluation for the conter,ts described in Sections 1.2.2.1, 1.2.2.2,-.l.2.2.3a, and 1.2.2.4 of this application.
2.1.1 Discussion This package utilizes design concepts which are similar to those used in the design of the NUMEC LA-36 and Pu-10-1 packages. ~The outer shell consists of two 16 gauge 22.5" diameter (nominal) steel drums welded end-to-end to fom a package approximately 74" long. The-inner container is an
-11.5 diameter (maximum), 16 gauge (nominal) steel cylinder with a flanged. closure consisting of a 1/2 inch thick (minimum) bolted flange and flange cover. A minimum of six 1/2"-13 NC bolts are used to seat a 1/8' inch thick Ancher Packing. Company " Target" or ".125" gasket which is provided to assure a leak-tight closure. Six tightly closed Fiberpak drums contain the uranium oxide. These drums have a nominal 9.5 ' inch diameter. Vermiculite is used to provide themal and mechanical insulation for the gasketed inner container which is positioned with a minimum of 12 steel spring spacers.
The top insulation plug may be fabricated of Unibestos. At i
least 5 inches of vermiculite insulates the inner container i
from the drum, except at the bottom where its thickness may be 4 inches. (1) The maximum weight of the packaging and contents is approximately 575 pounds.
2.2' General-Standards (2)'
2.2.1 Positive. Closure-i The outer cover is secured by either a 12-gauge-bolted closure ring or six (6).1/2"' diameter bolts.
l 2.2.2 Lifting Devices No lifting devices are' incorporated as a structural part of the package or its lid.
2.2.3 Tie Down Devices No tie downLdevices are incorporated as a structural part of l
the. package.
2.2.4. Structural Standards for.Large Quantity Packaging
.Not applicable.
2-1 0ctooer 28,-1980
3.3 For the contents described in 1.2.2.3 and assuming uniformly spaced unclad rods of full density 002 on a square pitch, a.
An individual shipping container fully flooded and the rods (at the optimum pitch) homogeneous 1y mixed with polyethylene at the optimum concentration has a maximum K-effective + 2 a 0.978 +-
0.013, which is subcritical at the 95% confidence level.
b.
An array of undamaged shipping containers no larger than 20 x 20 x 7 (2400 units) with no moderation as described in 3.1.b has a K-effective + 2 o of 0.982 + 0.009, which is subcritical at the 95% confidence level.
c.
An array of damaged shipping containers no larger than 14 x 14 x 4 (784 units) with no vermiculite between the inner and outer con-tainers and an optimum volume fraction water of 0.03 in this region as well as between shipping containers has. a maximum K-effective + 2 o of 0.984 + 0.009, which is subcritical at the 95% confidenZ'e level.
d.
With rods in the rectangular metal container (7.25" x 9" x 63")
an evaluation was performed as in 3.3.c with a resulting maximum K-effective + 2 o of 0.832 + 0.009, which is subcritical at the 95% confidenEe level.
3.4 For the contents described in 1.2.2.4.
a.
The individual container has a maximum cf two cans or one-half the material described in 3.3.a which has a maximum K-effective
+ 2 a 0.978 +.013.
b.1 An array of undamaged shipping containers no larger than 20 x 19 x 6 (2280 units) with one can per container and with no modera-tion as described in 3.1.b has a K-effective + 2 o of 0.982 +-
.011 which is suberitical at the 95% confidence level.
b.2 An array of damaged shipping containers no larger than 14 x 14 x 4.(784 units) with one c'an per container, fully flooded and with no vermiculite between the inner and outer containers has a K-effective + 2 o of 0.965 + 0.010 which is subcritical at the 95% confidenEe level.
c.1 An array of undamage.d shipping containers no larger than 6 x 6 x 2 (72 units) with two cans per container and with no moderation as described in 3.1.b has a K-effective + 2 e of 0.967 + 0.010 which is subcritical at the 95% confidence level.
c.2 An array of damaged shipping containers no larger than 5 x 4 x 2 (40 units) with two cans per container, fully flooded and with no vermiculite between the inner and outer containers has a K-effective + 2 o of 0.978 + 0.012 which is subcritical at the 95% confidenEe level.
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3-2 October 28, 1980
i 3.5. Fissile Class II
' The maximum number of shipping containers that could be tr sported due to weight limitations imposed by governmental transportation regulations would be less than 100. Five times that number, or 500 units, is less-than the smallest damaged or undamaged array allowed.
fh0=0.5 Thus:
Tharefore, any package describec in this application except for 3.4.c.1 and 3.4.c.2 would be assigned a transport index of 0.5.
For 3.4.c.1 and 3.4.c.2,' one-fifth the undamaged array,14 is smaller than one-half the damaged array, 20 hence 50 = 3.57 cr 3.6 transport units would be assigned.
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