Low level radioactive solid wastes generating from nuclear power plant are classified into air and liquid-filter, articles of consumption, various parts of replacement and consumption materials generating during periodical inspections, and so on. Therefore it is difficult to define such wastes univocally, because waste forms and contamination conditions are different respectively.
  In order to bury these wastes into a shallow land disposal site, it is necessary to understand waste properties, and to establish reasonable fabrication technology of waste package.
  We sampled and discriminated representative wastes at the power plants, and determined specifications of simulative wastes. Then we made confirmation test of fabrication technology of waste package through making full-scale simulative packages experimentally on the basis of reasonable waste package classification in consideration of conformity to technical criteria, and we examined non-destructive radioactivity measurement for waste packages. This report describes the outline of these studies.

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  To contribute good understanding of geo-hydrogeological structure in and around the Koongarra uranium deposit, the borehole TV logging and the three dimensional groundwater flow analysis were conducted. The results of the borehole TV measurement showed directional trends in the schistosity represented folds which were the most characteristic structure in the site scale. This fold structure was in accord with the directional trends in fracture and fracture frequency, and the axes of the interference test drawdown. The three dimensional ground water flow analysis was taken into account the hydraulic anisotropy which derived from the assumption that the direction normal to schistosity agree with minimum hydraulic conductivity. The result of analysis showed that directions of ground water flow agreed with drawdown axes, and the conceptual model of hydrogeological structure governed the site scale fold was verified.

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