ML19312E634
| ML19312E634 | |
| Person / Time | |
|---|---|
| Site: | 07109079 |
| Issue date: | 05/20/1980 |
| From: | Mallory C HITTMAN NUCLEAR & DEVELOPMENT CORP. (SUBS. OF HITTMAN |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML19312E635 | List: |
| References | |
| 16376, NUDOCS 8006050433 | |
| Download: ML19312E634 (3) | |
Text
hj[
Nu ea &
Development _
Corporation 9190 Red Branch Road Columbia, Maryland 21045 Refer to:
301/730-7800
/ h+
s IIN-5838
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May 20, 1980 Mr. Charles MacDonald Transportation Branch U.S. Nuclear Regulatory Commission 9217 Maryland National Bank Building Washington, DC 20555 Subj ect:
Certification of IINDC Modei 100 Series 2 Shipping Cask
Reference:
ilNDC Model liN-100 Series 2 Radioactive Materials Package Certificate of Compliance No. 9079, Rev. 4 Package Identification No. USA /9079/A
Dear Mr. MacDonald:
It is requested that the referenced Certificate of Compliance be amended.
Enclosed are eight (8) copies of IINDC Drawing Nos. C001-5-9122, Rev.1, C001-5-9123, Rev. 1, and C001-5-9124, Rev. 1.
These drawings replace llNDC Drawing No. C001-4-9199, Rev. E, Sheet 1 of 7 referenced in the current Certificate of Compliance.
Attachment A lists the changes which have been made in the drawings. As discussed in the May 7,1989 meeting at your offices, the drawings have been revised to show the critical features of the cask which are part of the safety analysis.
Features which do not affect the safety of the package are shown as typical and are made optional both with respect to usage and mtterials of construction. The purpose of this revision is to assure confonnance with the Certificate of Compliance with respect to safety features and to avoid questions of ampliance with respect to accessory equipment and other non-safety related appurtnances.
Enclosed please find our check in the amount of $150 for the processing of this revision as a minor amendment under Category lle.
Your cooperation in the processing of this amendment is most appreciated.
Shoul.' you have any questions or require further infonnation, please contact m?.
cry tru y yours, Cltr es
. Ma ry Vice Presit nt ', Engineering alf Enclosures s
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9 Attachment A Radioactive Materials Package Certificate of Compliance No. 9079 HNDC Model HN-100 Series 2 A.
General It is requested that Revisien No. 5 of the Certificate of Compliance be issued to cover the following changes in the referenced drawings for the package:
1.
Paragraph Sa(3) should be revised to read:
"The packaging is fabricated in accordance with Hittman Nuclear
& Development Corporation Drawings Numbers: C001-5-9122, Revisi'.,n 1; C001-5-9123, Revision 1, and C001-5-9124, Revision 1."
2.
These three drawings incorporate those design details and 6imensions which are part of the safety analysis of this package. Miiimum dimensions have been specified for critical items.
3.
Design details and dimensions which are not critical and are not part of the safety analysis of the package have been shown as typical with approximate and/or reference dimensions.
4.
Accessory items which are not part of the safety analysis are shown as optional with respect to usage and materials of construction.
5.
Permissable repair procedures which make the cask design more conservative than originally designed are included on the drawings.
These revisions are intended to more clearly distinguish those features related to safety from items which are not safety related. The purpose of this revision will be to avoid questions relative to compliance related to non-safety related features.
B.
Drawing No. C001-5-9122, Rev.1 1.
This drawing replaces Drawing No. C001-4-9119, Rev. E, Sheet 1 of 7.
It includes the detail of the cover lifting lugs shown on Sheet 5 of 7; the shield plug lifting lugs shown on Sheet 6 of 7; and the cover hold down lugs shown on Sheet 4 of 7.
2.
Reference dimensions and weld designations have been added to the closure details for the cask cover and shield plugs.
3.
The guide pins for the shield plug cover are designated as optional both with respect to usage and material of construction.
9 a
Page 2 Attachment A No. 9079 4.
Approximate and/or reference dimensions are shown on the cask body and covers where the exact dimensions and/or tole ance are not critical to the safety analysis.
5.
The part numbers have been removed since these refer to manufacturing shop drawings.
6.
The gasket for the primary lid is specified to have a minimum thickness of k inch and a minimum width of 3/8 inch. This gasket is timinally wider and is cut to fit inside the spacer ring and around the guide pins, when used, while maintaining the minimum thickness. The thickness of the gasket is increased as necessary to provide an adequate closure based on the manufacturing tolerances of individual shipping packages.
C.
Drawing No. C001-5-9123, Rev.1 1.
This drawing replaces Drawing No. C001-4-9119, Rev. E, Sheet 2 of 7.
It includes the ratchet binder bracket and cask tiedown bracket shown on Sheet 3 of 7.
2.
Approximate and/or reference dimensions ate shown for non critical parts.
3.
The cask cover guide pins are optional both with respect to usage and materials of construction.
4.
The spacer strip is specified to have a minimum thickness of 1/8 inch and a minimum width of 1/2 inch except at the guide pins. The amount of material removed to fit the spacer strip around the guide pins will have an insignificant effect on the required area for the spacer strip included in the safety analysis.
D.
Drawing No. C001-5-9124, Rev. 1 1.
This drawing replaces Drawing No. C001-5-9110, Rev. E, Sheet 7 of 7.
2.
Dimensions on washers, holes and other non critical attachment have been remov d.
3.
Three permissable repair options are specified for the replacement of the shield plug studs in holes which have damaged threads.
a.
IIeli coil inserts use material with strength equal or greater than the stud material and the larger diameter increases the effective shear area at the root of the thread.
b.
Where possible, holes are tapped deeper to provide equivalent thread engagement with the use of longer studs.
c.
Large studs are used when "a" or "b" cannot be used.
This requires increasing the diameter of the holes in the shielo plug lid. The large holes do not significantly affect the strength of the lid.
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