ML20128E598
| ML20128E598 | |
| Person / Time | |
|---|---|
| Site: | 07105597 |
| Issue date: | 06/25/1985 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Garrison R ENERGY, DEPT. OF |
| References | |
| NUDOCS 8507050394 | |
| Download: ML20128E598 (2) | |
Text
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Department of Energy ATTH: tir. Roy F. Garrison DP-122.2 Washington, DC 20545 Gentlemen:
This refers to your application dated July 31, 1978, as amended, requesting approval of the Model No. Tungsten Shielded Cask packaging.
In connection with our review, we need the infomation 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. The additional infomation requested by this letter 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.
Sincerely, 0;
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13 Charles E. NacDonald, Chief Transportation Certification Branch Division of Fuel Cycle and Material Safety, ?!!!SS l
Enclosure:
As stated Distribution: w/enci WHLake DTHuang CRMarotta Docket File 8507050394 850625 NRC PDR PDR ADOCK 07105597 IE HQ C
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Depu.*tnent of Encrgy
!!odel f!o. Tungsten Shielded Cask Packaging Docket !!o. 71-5597 Encl to ltr dtd:
l.
Identify the components and provide the calculations which support the 34-square inch shear area used for the closure.
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2.
Discuss why the shear ring weld need not be addressed for the 30-foot free drop. Note:
Item Ho. 3.d of our letter dated October 12, 1932, requested analysis of the shear ring weld.
- 3.
Demonstrate that the dynanic test data (stress-strain, Fig.1.1 of theSAR)areusedconservatively. It is not evident that the dynamic test data when applied to the Tungsten Shielded cask are appropriate. Because of the geometric dependence, applicability of the test data should be considered and non-conservative use of the dynanic data should be precluded.
4.
The detailed analysis of the closure studs and bolts should be provided for the 30-foot free drop. He also note the predicted maximum stress for the studs (41,095 psi) exceeds the reported yield stress (30/100 psi). Use of criteria above the yield stress for closure bolting is not acceptable for denonstrating package performance analytically.
5.
The as-built drawings should be revised to include the 1/4-inch thick shear washers.
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