ML19322E627
| ML19322E627 | |
| Person / Time | |
|---|---|
| Site: | 07109135 |
| Issue date: | 02/27/1980 |
| From: | Richardson H NUCLEAR SYSTEMS, INC. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 8004020025 | |
| Download: ML19322E627 (9) | |
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l February 27, 1980 j
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h tH Mr. Charles E. MacDonald, Chief 3
G Transportation Certification Branch W
Division of Fuel Cycle and Material Safety 3o U. S. Nuclear Regulatory Commission y
Washington, D. C.
20555
REFERENCE:
Docket No. 71-9135
Dear Mr. MacDonald:
Enclosed are it e s to be inserted into the application for NRC Certificate of Compliance application on " Century" model devices manufactured by Gac:ma Industries, These enclosures should allow you to complete the review process of this r
application. We have specifically responded to each requirement on the following pages:
1.
Delete detailed drawings - Appendix C Replace all drawings in Appendix C with enclosed drawings.
821-1001-438 Original Century S 821-1001-439 Original Century SA 821-1001-440 Original Universal S 821-1001-441 Original Universal SA 2.
Revision for page 0.2 This revision deletes specific drawing numbers for components.
l Denotes nominal weight for these packages.
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~ y'd L 15638 PROGRESS THROUGH INNOVATION 4004020 0 3 6 I
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'..g Mr. Charles E. MacDonald, Chief Page Transportation Certification Branch Division of Fuel Cycle and Material Safety U. S. Nuclear Regulatory Comission Washington, D. C.
.20555 M
February 27, 1980 <;
3.
Revisiotr for pages 7.7A and 7.7B
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This revision addresses the rationale for specific i:1 pact points for the drop and puncture test. Page 7.7B is a' graphic showing the orientation of the device injboth the drop and the puncture test.
Thank you for your prbpt consideration of these revisions, we urgently need these approvale:,i j
Yours truly,
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.x GAMMA INDUSTRIES J
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Harry D. Richardson Radiation Safety Officer EDR/dt Enclosures 4
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0.2 Packaging specifications elong with analysis and test results are detailed within this documeat.
0.2 Package Description All devices presented in this report are similar.
They are com-prised of common major items.
1.
Depleted uranium shielding containing an "S" tube of stainless steel or zircaloy.
2.
Steel cylindrical ca. sing 3.
Cellular polyurethane foam to fill cavity between the casing and uranium.
4.
Lock box assembly 5.
~ Handle 6.
-Nameplate Nominai.. weight of the package in the proper shipping configuration is 45 pounds.
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I 7.7A Additional information requested by Mr. Charles E. MacDonald on September 11, 1979 -
1.
Provide justification that the hypothetical accident 30-foot drop and puncture tests were performed such that maximum damage to the lock-box assembly was sustained.
INTRODUCTION Large numbers of these devices have been used for many yearc.
In accident conditions on highways and construction projects these " Century" models have been run over by trucks and tractors, dropped onto concrete slabs from heights ap-proaching 100 feet, dropped into ocean depths from pipeline barges, et al with no breaches of shielding integrity being reported to Gamma Industries.
Devices with similar construc-tion are being used at ocean depths exceeding 1,000 feet. It l
is believed that the stresses imposed in these situations is greater than those stresses. imposed by the drop test and puncture test.
The rationale for selecting impact conditions for imposing maximum damage to shielding integrity follows:
a.
Drop Test from 30 feet The device was suspended and dropped with an 3ttitude that the lockbox safety cap would be the initial im-pact point with the device center of gravity verti-cally above the impact point.
It is believed this would cause maximum stress upon the lockbox and the bolts which secure the lockbox to the steel housing.
Any other attitude would result in generating a mo-ment causing rotation about the impact point, thereby decreasing the stresses upon the lockbox, bolts, and the housing.
b.
Puncture First, it is inconceivable that the drop from 40 inches vpon a 6 inch diameter steel bar could cause any damage uo a. device like the " Century".
Second, in attempting to determine which impact point would be likely to inflict the most damage, it was believed appropriate to select a drop from 40 inches e
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7.7B with a direction and attitude which would cause maximum stress on the lockbox " flanges" and the bolts.
The drop was made in such a manner that the initial impact point upon the steel bar was near the outer end of the lockbox.
This would provide the maximum bending moment upon the lockbox and also provide shear stresses upon the bolts.
No adverse results to hielding integrity were ob-served after these tests were completed.
1 P UNC T U R E-IMPACT ORIENTATION TESTS i
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