AbstractThis paper presents results of dose estimates for the most exposed individual due to a daily release of 10 Ci tritium in oxide form from a fusion plant. Twenty-one models were selected from the literature. Since they employ varying assumptions about key parameters, a 500 fold range of dose estimates results: 0.15 and 75 μSv/a. The main reasons for the large range are differences in stack height and assumptions on the atmospheric dispersion, quality factor Q, climate and ratio of the ingestion and inhalation doses. A proposal for narrowing down the predictions to the range 2–5 μSv/a (Q = 1) is given. A short overview of model results on population and global doses is also given.