Advanced nuclear reactors and tritium impacts. Modeling the aquatic pathway

► We focused on nuclear reactors as potential sources of tritium contamination. ► Tritium impacts of accident release were evaluated in a predictive way. ► Hydrodynamic circulation with inverse modeling procedures provided reliable results. ► Increase of pumping rates could be used in the first days to accelerate dilution. ► Data gaps for assessing OBT dynamics in tropical aquatic ecosystems are addressed.