ML19263D059
| ML19263D059 | |
| Person / Time | |
|---|---|
| Site: | 07109023 |
| Issue date: | 03/01/1979 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Williams C NL CHEMICALS (USA), INC. |
| References | |
| NUDOCS 7903200593 | |
| Download: ML19263D059 (3) | |
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UNITED STATES
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- j W ASHINGTON, D.
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a s..v MAR 011979 FCTR: RHO 71-9023 NL Industries, Inc.
ATTN:
Mr. C. E. Williams P.O. Box 2046 Wilmington, DE 19899 Gentlemen:
This refers to your application dated October 10, 1978, requesting an amendment to the Model No. NLI-10/24 packaging approval.
In connection with our review, we need the information identified in the enclosura to this letter.
Please advise us within thirty (30) days from the date of this letter when this infonnation will be provided. The additional information requested by this letter should be submitted in the form of revised pages to the original Safety Analysis Report in order to preserve the continuity of your application.
If you have any questions regarding this matter, we will be pleased to meet with you and your staff.
Sincerely,
.9 Char es
. acDonald, Chief Transportation Branch Division of Fuel Cycle and Material Safety
Enclosure:
As stated 7903g999 3 L
NL INDUSTRIES, INC.
MODEL NO. NLI-10/24 PACKAGING Encl to ltr dtd:
'M' 01 1979 STRUCTURAL Inner Closure Lifting Lugs Either show that no lateral forces will be applied to the eyebolts on the inner closure head or revise the analysis (page. X1-2-5) to include the stresses produced by the horizontal component of the lifting force.
Cask Tie-Down System Either delete the improved presentation (including text and drawings) and revert to those previously approved or identify and evaluate changes to the t12-down/ impact limiter design and provide a set of drawings that show the changes in a way that is straightforward and consistent with the
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previous designation system.
Thermal Stresses
- 1) Confirm that the cask end temperatures reported on page X1-3-3A for normal conditions and page X1-4-3A for accident conditions are identical to the values used at corresponding points on the cask to calculate stresses due to thermal gradients and differential thermal expansion.
- 2) Confirm that changing the PWR basket diameter from 44.790 inches to 44.79 inches on Drawing No. 70652F, Sheet 1, will not result in contact between the basket and the inner shell (see Figure 5, page X1-3-29).
PWR Spacer Plug
- 1) The 28-1/4-inch dimension is incorrectly shown on the sketch on page X1-4-73.
- 2) Describe the procedure that will be used to assure that the PWR spacar length is suff.c;c t to prevent excessive movement of the fuel (pg. Al-4-71 and note (1) on Drawing No. 70655F). Also, describe the procedures that will be used to assure the PWR spacer plug is placed in the proper angular orientation (i.e., is not rotated 90 degrees from position shown on drawing.
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NL Industries, Inc.- 3) The length of absorber material shown on the sketch in the SAR (pg. X1-4-71) does not agree with the length shown on Drawing No. 70652F, Sheet 1.
- 4) State the exposure time used to obtain a 68% reduction factor for A16061-T6 material from MIL HDBK-5 and justify that this value is appropriate.
MISCELLANEOUS Provide a complete page tabulation, giving each page number and associate page revision number.
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