The ECOSYS-87/FDMT model has been successfully transferred to the ECOLEGO modelling platform. Data have been collated, primarily for element-dependent/radioecological parameters such as, soil to plant transfer factors and animal to feed transfer coefficients, to provide a ‘current state-of the-art’ update to the original ECOSYS-87/FDMT model. Unlike previous considerations of this model we have also collated underlying statistical information for parameters that enable uncertainty and sensitivity analysis. The Excel files available here present the parameters as uploaded into the ECOLEGO implementation of FDMT.