ML19344F250
| ML19344F250 | |
| Person / Time | |
|---|---|
| Site: | 07106400 |
| Issue date: | 08/15/1980 |
| From: | Austin M BABCOCK & WILCOX CO. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 17099, NUDOCS 8009150019 | |
| Download: ML19344F250 (4) | |
Text
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9 DOCKETED 9
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USNRC Babcock &Wilcox 6
Aue 2 61980 > sr-necieer ueteoeis ousion p-609 North Warren Avenue, Ap0I:o. Pa.15613 M Al' ON
, DCCKET CLEM,
Te:ephore: (412) 842-o111 Y'
N August 15, 1980
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Mr. Charles E. MacDonald, Chief Transportation Certification Branch 5
9 Division of Fuel Cycle and Material Safety 3
U. S. Nuclear Regulatory Commission U
Washington, D.C.
20555 j
g Docket No.:
71-6400 U,
Dear Mr. MacDonald:
Reference is made to our letter dated July 10, 1980 and to telephone con-versations of August 1, 1980 between Messrs. P. J. Defilippi and M. A. Austin of Pa. Operations and Messrs. R. Odegaarden and R. Chapel of your office.
Enclosed herewith is the information requested in the above referenced telephone conversations and is submitted as additional information in support of the amendment request contained in the referenced July 10, 1980 letter.
This information concerns the Certificate of Compliance No. 6400 for the Model 6400 ("Supertiger") shipping container.
Specifically, Enclosure I provides a discussion of the safety significance of items identified in the referenced July 10, 1980 letter, and Enclosure II is the revised drawing which incorporates these identified items.
It is our understanding that the enclosed information should be sufficient to permit approval of the above-referenced request. However if additional information is required, please contact me as soon as possible.
Due to the urgency of this matter, your prompt consideration is requested and will be greatly appreciated.
Very truly yours, 19Mputsc PJD/MAA/gd Michael A. Austin, x=
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Manager, Technical Control
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8009150ott 17099 The Babceck & Wilcox Cempany / Established 1867
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ENCLOSURE I Discussion of safety significance of deviations from Protective Packaging, Inc. Drawing No. 32106-1 as identified in the July 10, 1980 letter to Mr. C. E. MacDonald (NRC) from M. A. Austin (Pa Ops).
1.
Drawing No. 32106-1 indicates that the " internal cavity panel" is to be flat within 3/16 inch. Our Model 6400 container has side panels in the internal cavity which are flat to within 1 inch, and the floor panel is flat to within 7/16 inch.
(Drawing location: G4).
2.
Drawing No. 32106-1 indicates that the " external container panels" are to be flat within 1/4 inch.
Our Model 6400 container has said panels which are flat to within 35/64 inch.
(Drawing location: G5).
Discussion:
Relative to these items, a visual examination of the inner cavity and both internal and external panels has verified no breaching of panel integrity and indicates all welds to be sound and free of cracks.
Therefore, the deviations from the flatness specifications have not adversely affected the integrity of the shipping package and are deemed to be of no safety significance.
3.
Drawing No. 32106-1 indicates a " dowel pin length" of 2 inches 1/8 inch.
Our Model 6400 container has a dowel pin length of 1-3/8 inch.
(Drawinglocation: C4).
4.
Drawing No. 32106-1 indicates a " bolt pocket size" of 6 inches 1/8 inch. Our Model 6400 container has a bolt pocket size of 5-3/4 inches.
(Drawing location:
C4).
Discussion:
Relative to these items, although deviating from the drawing specifica-tion, these assumed dimensions do not effect the integrity of the shipping package and are deemed not to be of safety significance.
5.
Other general characteristics of our Model 6400:
a.
hside cavity door contains thirty-four (34)-1/2 inch diameter
'olts.
c Dis :ussion:
The number of bolts on the inside cavity door is specified as one bolt every 10 inches (on centers) with the dimensions of the inside cavity
[
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'e ENCLOSURE I Page 2 door being 79'1/4 inches x 79 1/4 inches. Considering this data, thirty-four.(34) bolts exceeds the drawing specification, there-fore a safety discussion is'not necessary.
b.
Inside cavity door has three (3) hinges.
Discussion:
The number of hinges on the inside cavity door is not specified on.
Drawing flo. 32106-1; therefore three (3) hinges are deemed adequate and therefore this item has no safety significance.
c.
Inside cavity door plate thickness is.255 inches.
Discussion:
Given the acceptat,lefractional tolerance of 1/8 inch on Drawing No. 32106-1 our cavity door thickness of.256 inches is within the tolerance, therefore no safety discussion is necessary.
d.
Inside cavity door gasket thickness is.260 inches.
Discussion:
The inside cavity door gasket thickness is not specified on Drawing
.10, 32106-1, therefore our gasket thickness of.260 inches is deemed adequate and therefore this item is of no safety significance.
e.
A purge hole is present in the center of the inside cavity door.
Discussion:
i A 1/8 MPT. pressure fitting and cap is specified on Drawing No..
32106-1. -Our shipping unit does have such a fitting as specified, therefore no safety discussion is necessary.
This fitting was previously misrepresented as a " purge hole" in the July 10, 1980 letter to Mr. C. E. MacDonald.
- f.. Outer container door plate thickness is.370 inches.
Discussion:
The outer container door plate thickness is specified as 3/16" and our door plate thickness exceeds that which is specified; therefore the integrity of the container is enhanced.
s,
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3 ENCLOSURE I'
Page 3'
g.
Outer container door has fourteen (14) - 1 inch diameter bolts.
Discussion:
Fourteen (14) 1 inch bolts was an error in our July 10, 1980 letter-the number of bolts should have been ten (10).
Drawing No. 32106-1 specifies the outer container door to be bolted in "typ. 10 places".
Considering the foregoing, this item is not a deviation and therefore a safety discussion is not necessary.
h.
Outer container door has two (2) hinges with a grease fitting in each hinge.
Discussion:
This item meets the specification on Drawing No. 32106-1 and exceeds i
the specification by additionally being equipped with grease fittings.
The addition of the grease fittings does not affect the safety of the container.
i 1.
Plywood on the inside of the outer door is.350 inches thick.
Discussion:
This dimension is within the tolerances specified for commercially.
available plywood and that indicated en Drawing No. 32106-1.
There-fore, this item is considered to be of no safety significance.
j.
Four (4) re-enforcement steel plates are welded on the inside cavity back wall (refer to the figure provided as Enclosure No.1).
Discussion:
. Although not specified on Drawing No. 32106-1, the addition of the four (4) re-enforcement steel plates may strengthen the integrity.
of the shipping package, thusly enhancing its safety.
II 17C09
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