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DOE-STD-3028-2000
6.3
Contained Materials
6.3.1
Container Fill Gas
1. The atmosphere within any of the containers (including the convenience container, if
used) shall not react adversely with the sealed containers or contained materials.
Examples of atmospheres that may be used include argon, neon, nitrogen, and air.
2. The atmospheres within the inner and outer containers shall not preclude leak-
testing of the containers.
6.3.2
Mass of Contained Materials
1. The total mass of 233U and other associated fissile species shall not exceed
(a) 5.4 kg (11.9 lbm) for metal or 9.1 kg (20 lbm) for oxide per container, or (b) the
limits specified in site-specific nuclear criticality safety programs, policies, and
procedures for storage.
2. The mass of contained materials shall be limited further when needed to ensure that
the bounding pressure of the inner and outer cans (calculated using the Aggregate
Pressure Equation [Equation B.9] in Appendix B) is less than the respective
container Design Pressure.
3. In cases where multiple limits exist, the most restrictive limit shall be applied.
6.3.3
Packaging Process
1. Readily removable foreign materials, such as metal fasteners and other debris, shall
be removed from the material to be stored prior to packaging.
2. The oxide sample taken for verification (Criterion 6.1.2.3) shall be as representative
as possible of the material placed in the sealed container at the time of packaging. If
the material is to be stored in a convenience can for some time before packaging,
and the provisions of Criterion 6.1.4.1 apply, the sample shall be as representative
as possible of the material to be placed into a closed container.
3. Contained materials shall be packaged in such a way as to prevent corrosion or
adverse effects on the structural integrity of the inner or outer container.
4. Only chemically and isotopically similar materials should be combined in an inner
container or convenience container and packaged for storage.
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