[en] The problems associated with reprocessing oxide LMFBR fuel elements result from the higher plutonium content, the higher fission product content and the higher level of thermal decay power; their consequences on the Purex process are well recognizable. Reprocessing LMFBR elements by the conventional Purex process technique is considered to be feasible. If the cooling time of LMFBR fuel elements amount to one year or more, it is only the higher plutonium content which determines the process flowsheet. The necessary chemical steps for reprocessing co-precipitated oxides have been developed at Karlsruhe for this case. The mechanical head end still needs to be developed on a technical scale, as does the management of safety against criticality. If reprocessing is to follow a cooling time of less than 200 days, as envisaged in the original planning for LMFBR fuel elements, the efficiency of offgas treatment and the reliable operation of fas contactors in the first extraction cycle still have to be tested. (orig.)