26.08.2010
Very deep – below 4 km – borehole is one of the design options for the U.K.’s HLW geological disposal facility. It is assumed that heat resulting from the radioactive decay can be used to melt the surrounding rocks which would create a capsule, sarcophagus on cooling down and crystallisation of granite. Melting of surrounding rocks could result in sinking or floating of waste canisters depending on difference in the densities of waste and rock, therefore additional buffer inserts have to be used to compensate such a difference.
06.08.2010
Montenegro, which is now an independent state, resulted from the disintegration of Socialist Federal Republic of Yugoslavia. Montenegro is one of most attractive European countries famous for its beautiful coasts on Adriatic See, mounting karsts and the Europe’s deepest canyon, the Tara Canyon dug in limestone deep up to 1,300 m. Montenegro, which was declared an ecological state, has recently hosted the Regional Training Course for Waste Management Operators on Radioactive Waste Management - Pre-Disposal Technologies.
03.08.2010
Slovakia started its vitrification programme in 1997 putting into operation HLW vitrification facility VICHR. This facility was designed to immobilise 31 m3 of aqueous HLW which resulted from storage of spent fuel in a 3 to 5% solution of chromate and dichromate of potassium (K2CrO4 and K2Cr2O7, so caled chrompik). Main HLW contaminants were fission products such as 134, 137Cs and 90Sr.
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