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Criticality Analysis of Pu and U Accumulations in a Tuff Fracture Network

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A00000000-01717-0200-00050_MOL.19980216.0260.pdf (10.67 MB) 10.67 MB

The objective of this analysis is to evaluate accumulations within the thermally altered tuff surrounding a drift. The evaluation examines accumulation of uranium minerals (soddyite), plutonium oxide (Pu01), and combinations of these materials. A hypothetical model of the tuff is used to provide insight into the factors that affect criticality for this near-field scenario. The factors examined include: the size of the accumulation, the fissile composition of the accumulation, the water or clayey material fraction in the accumulation and the water fraction in the tuff

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