ML20003H644
| ML20003H644 | |
| Person / Time | |
|---|---|
| Site: | 07109070 |
| Issue date: | 03/16/1981 |
| From: | NUCLEAR PACKAGING, INC. |
| To: | |
| Shared Package | |
| ML20003H638 | List: |
| References | |
| 18840, NUDOCS 8105060558 | |
| Download: ML20003H644 (5) | |
Text
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INSTRUCTIONS FOR INCORPORATING REVISION 3 Q
AMENDMENTS TO MODEL N-55 APPLICATION, DATED MARCH 16, 1981 Insert new page 1-21 Remove old page 1-21
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Add new page 1-21a Insert new page 1-51 Remove old page 1-51 Insert new Drawing X-60-200D Remove old Drawing No.
Rev. C X-60-200D, Rev. B
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Revicion 3 March 16, 1981 drum's integrity.
Af ter reviewing the damage, it was concluded that the package performance could be improved through a small modification to the inside shell configuration.
The prototype interior ends were flat.
On impact the flanged heads of the drum were de-flected down until contact was made with the interior shell.
This represented the najority of the drum deflection.
There-fore, by preshaping the package interior to more closely match the drum lid exterior, localized deflection would be nearly eliminated.
Loading would be more uniformly distributed and reacted in simple compression.
As a result, the design has been modified to include localized support. (Refer attached sketch).
It can be concluded from the photos that the drum maintained its integrity following three 30 foot drops and experienced no loss of contents.
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l Subsequent 30 foot drop tests were conducted in 1980.
These tests were conducted in the identical manner but with two l
changes to the package.
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I The first change was to actually incorporate the referenced fiberglass liner.
This liner more closely matched the con-figuration of the drum than the one used during the initial I
prototype testing.
Its configuration was identical to that shown on the basic Safety Analysis Drawing.
1-21 l
R2 vision 3 March 16, 1981 The second change was the replacement of the 2 inch thick honeycomb with the basic rigid foam.
This was done in order to simplify construction and improve lateral shear capability.
3 Four 30 foot drops were conducted.
Overpack deformations were nearly identical to those found in previous tests.
The only significate variation was the reduction in damage to the fiberglass liner and drum.
The liner showed no_ indication of cracking (Ref. Page 1-20).
Deformation to the drum was significantly less and, as a result, survived a 15 psig pressure with no indication of leakage.
Therefore, we conclude that the removal of the honeycomb improves the performance of the package.
Packages manufactured after March, 1981, will incorporate this revision.
- 1. 7. 7.
Puncturc A 40 inch drop onto a 6 inch diameter pin produced a local in-l dentation of approximately one inch.
Examination of the drum showed no apparent effects from the drop.
It can be concluded that the drum experienced no detrimental effects from the puncture test.
1-21a
Revici:n 3 March 16, 1981 Appendix 1.10.1 l
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