ML20057B254
| ML20057B254 | |
| Person / Time | |
|---|---|
| Site: | 07109222 |
| Issue date: | 09/15/1993 |
| From: | Chappell C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Ramsey T SCIENTIFIC ECOLOGY GROUP, INC. |
| References | |
| NUDOCS 9309210053 | |
| Download: ML20057B254 (2) | |
Text
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NRC FC NRC; PDR..
NMSS r/f STSB r/f STSB:CJW 71-9222 Scientific Ecology Group, Inc.
ATTN: Mr. Timothy B. Ramsey P.O. Box 2530 1560 Bear Creek Road Oak Ridge, TN 37831-2530
Dear Mr. Ramsey:
This refers to your application dated January 26, 1993, as supplemented June 10, 1993, requesting renewal of Certificate of Compliance No. 9222 for the Model No.14-215 shipping package.
In connection with our review, we need the information identified in the enclosure to this letter.
Please advise us within 30 days from the date of this letter when this information will be provided. Additional information requested by this letter j
should be submitted in the form of revised pages.
If you have any questions regarding this matter, we would be pleased to meet with you and your staff.
Dr. Carl Withee is the project manager for our review of your application.
Dr. Withee may be contacted at (301) 504-2358.
i Sincerely, Original Signed by Cs;t R. Chnpell Cass R. Chappell, Section Leader 4
Cask Certification Section Storage and Transport Systems Branch Disision of Industrial and Medical Nuclear Safety, NMSS
Enclosure:
As stated OFFC STSB k
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NAME CJWithe HWLeeh([
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nl 71-9222 SEP 151993 Encl to ltr dtd:
lhe following additional information is needed for the proposed optional 1-1/4" x 5 threads per inch Acme type screw threads on the ratchet binder:
1.
Note 21 on Drawing No. STD-02-077, Rev. 8, specifies a minimum yield strength of 125,000 psi for the Acme ratchet binder bolt (Item 34).
However, the yield strength of the bolt material, ASTM A320, Gr. L-7, is only 105,000 psi.
Specify any change in material for the Acme bolt or explain this apparent discrepancy.
2.
When the bolt threads changed from 12 UNF to 5 threads per inch, the threads on other connected parts must also be changed (i. e. Items 32 and 33). The application should demonstrate the adequacy of these items and show that the rated capacity of the ratchet binder will not be reduced.
3.
The equation used to check the bolt strength for the 1-1/4" x 5 threads per inch Acme thread is only applicable for unified screws threads (page 2-59 of the application). Provide a sketch of the Acme thread and justify applying the equation for unified screw threads to the Acme type thread.
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