In contrast to fossil See 'nuclear fuel'. the See 'nuclear fuel'. in nuclear reactors cannot be converted “in one go” since the See 'nuclear fuel'. undergoes changes during its use in the System used to initiate, maintain and control a fission chai... which require the See 'nuclear fuel'. elements to be exchanged. The See 'nuclear fuel'. which has not been spent and the generated Plutonium - the 94th element in the classification of elemen... may be recovered by Application of chemical processes to separate the valuable s... the removed See 'nuclear fuel'. elements. Light water reactors have a burnup of 45,000 to 50,000 Megawatt day per tonne; unit for the thermal energy output f... of Natural radioactive element with the atomic number 92. The n.... This means that about 45 to 50 kg of fissionable material per tonne of In accordance with the definition of the German Atomic Energ... used have been fissioned and 360 to 400 million kWh of electricity have been generated at a Thermal power plant, primarily used for electricity generati... Ratio of machine output and input. The efficiency is related... of 34%.