Tom has a PhD in Geographic Information Systems and Environmental Modelling. He is responsible for both the methodology and development of the Level-3 (off-site consequences) Probabilistic Safety Analysis Code PACE, for evaluating the consequences of radiation accidents. Tom also develops and maintains the ERMIN model in collaboration with European partners; ERMIN assesses the long term doses and the consequences of decontamination in contaminated urban areas and has been implemented international nuclear accident decision support systems.