Plant on the premises of the reprocessing plant Karlsruhe for the vitrification of the around 60 m3 liquid high active waste solution stored there. This waste comes from the operation of the reprocessing plant Karlsruhe where a total of 208 t spent nuclear fuel was reprocessed between 1971 and 1990. The 60 m3 fission product solution contain about 8 t solids, including 504 kg uranium and 16.5 kg plutonium. The total activity of this liquid high active waste amounts presently to about 1,018 becquerel. The glass melting furnace of the vitrification plant is electrically heated and keeps the molten mass bath of a special boron silicate glass at a temperature of approx. 1,150 °C. The liquid waste is added to this bath where the liquid component evaporates and the radioactive solids are embedded in the molten glass mass. The latter containing radioactivity is filled into 1.3 m high 150 l steel canisters. Following cooling, the canisters are welded gas-tight. This solidification enables a volume reduction from 60 m3 to barely 20 m3. On June 22, 2010 the vitrification of the 60 m3 fission product solution was completed, producing a total of 122 canisters.