Development Of Sprayed Backfill Technology
Author(s)
J. Pacovský & J. Šťástka
Abstract
It is envisaged that sprayed backfill technology will be used to fill the access
galleries of deep geological repositories for radioactive waste produced by
nuclear power plants. This technology has already been experimentally tested at
several locations outside the Czech Republic. The basic sprayed material consists
of bentonite, a natural ecological material which fulfils all the quality demands
required in the construction of deep geological repository engineered barriers
including, in particular, swelling capacity, impermeability, high plasticity and
self-healing ability. It is anticipated that spraying will serve for backfilling those
underground spaces inaccessible to ordinary machinery. The space filled by
sprayed backfill must prevent the penetration of hazardous radionuclides to the
same extent as those spaces backfilled with hand- and mechanically-compacted
natural bentonite or its mixture with crushed rock.
Keywords: radioactive waste, engineered barrier, sprayed backfill, shotclay,
bentonite.
Keywords
radioactive waste, engineered barrier, sprayed backfill, shotclay,
bentonite
Related Book
Other papers in this volume
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