The proposed Ruprechtov NAS site is situated in a Tertiary basin in the western part of the Czech Republic. Advantages of this site are:
  • the site fulfils requirements for commence-ment of natural analogue studies,

  • the site is characterised on basic level (geology, groundwater hydrology and chemistry),

  • site access (drilling & sampling) for the study period is ensured,

  • possibility of using information that can be acquired during commencement of kaolin mining planned some hundreds of meters from proposed boreholes (opening expected in 2 years).


Loch Lomond, Scotland

The main geological units at the site are

  • Soil (Quaternary),
  • Volcanodendritic layers (Tertiary),
  • Kaolin and,
  • Underlying granite.

The sediments are mainly composed of quartz, kaolinite, montmorillonite, pyrite, ana-tas/rutile, gypsum, siderite etc. Characteristic feature of the site is the heterogeneity of sediments at small scale. Unevenly distributed U accumulations occur in Eocene - Miocene clays in the depth of 10-40 m. The highest content of U was found at the level of 350 mg.kg-1 (approx. 4500 Bq.kg-1).