ML19263B102
| ML19263B102 | |
| Person / Time | |
|---|---|
| Site: | 07105552 |
| Issue date: | 12/27/1978 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Mott W ENERGY, DEPT. OF |
| References | |
| NUDOCS 7901050087 | |
| Download: ML19263B102 (3) | |
Text
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UNITED STATES
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C. 20555
.o DEC 2 71978 -
FCTR:WHL 71-5552 4
U.S. Department of Energy ATTN: Dr. William E. Mott Washington, DC 20545 Gentlemen:
This refers to your letter dated July 31, 1978, requesting our review of the Model Gas Cylinder Fire Impact Shield package.
In connection with our review of this package, we need the information identified in the enclosure to this letter.
Please advise us when this informati_on will be provided.
Sincerely, h)S Charles E. MacDonald, Chief Transportation Branch Division of Fuel Cycle and Material Safety
[
Enclosure:
As stated cc:
DOE, Oak Ridge Operations Office ATTN: Mr. William H. Travis P.O. Box E Oak Ridge, TN 37830 7tolosooa7 c
4 Model Gas Cylinder Fire Impact Shield Package 71-5552 Enclosure to ltr dtd: DEC 2 71978 DRAWINGS AND SPECIFICATIONS 1.
Provide drawings or specifications for the primary containment vessel.
The drawings or specifications should identify all significant safety features, such as: dimensions, materials of construction, welds, seals and valves.
2.
Provide drawing or specifications to identify the various lead shield configurations proposed for this package.
STRUCTURAL / CONTAINMENT 1.
Evaluate the performance of the impact shield lid closure design for the 30 foot drop test. We note that the protective overpack used for comparison (Appendix B of Report No. ORNL/ENG/TM-5, Oct.1977) is similar, but has a much different lid closure design.
2.
Evaluate the effects of the 30 foot free fall test on the primary containment vessel.
Determine the containment capabilities of the package for the accident damage conditions, and normal conditions of transport. Regulatory Guide 7.4 may be used to establish con-tainment criteria, and to provide a method of demonstrating accept-ability.
SHIELDING 1.
Show that the shielding effectiveness of any proposed lead shield configurations are not substantially reduced as a result of the normal conditions of transport.
2.
Show that the requirements of 10 CFR 571.36(a)(1) are met for any proposed lead shield configurations.
TESTING AND MAINTENANCE Provide a containment testing and maintenance program. Tests should include initial, periodic and preshipment containment tests. A main-tenance schedule for inspection, testing and component replacement should be provided.
_2-Regulatory Guide 7.4 may be used for establishing containment tests before first use and for periodic testing. For assembly verification it is recommended that a test of sufficient sensitivity to limit the maximum release to a Type A quantity in 10 days be used, however, a leak test sensitivity greater than 1 x 10 3 atm-cm /sec, would not be required.
3 The minir,ium sensitivity of 1 x 10~1 atm-cm /sec (air at 1 atm and 25 C 3
leaking to a 10 2 atm ambient) as specified in ANS1 fil4.5 should be met.