The results are within a factor of 2e5 of the observations for gamma
dose rates (0.52 and 0.85 for FAC2 and FAC5), and 5e10 for deposition (0.31 for FAC2, 0.73 for FAC5 and
0.90 for FAC10). A sensitivity analysis is also made to highlight the most sensitive parameters. A source
term comparison is made between IRSN’s estimation, and those from Katata et al. (2012) and Stohl et al.
(2011). Results are quite sensitive to the source term, but also to wind direction and dispersion parameters.
Dry deposition budget is more sensitive than wet deposition. Gamma dose rates are more
sensitive than deposition, in particular peak values