An uncertainty/sensitivity analysis of MACCS code

An uncertainty/sensitivity analysis performed with the MACCS computer code for the early health effects associated with a severe nuclear reactor accident is described. Results obtained in this study indicate that (1) the impact of consequence modeling uncertainty in an integrated risk assessment may be significant; (2) dominant variables involving early health effects include scaling for horizontal dispersion, population relocation time, dry deposition velocity, and groundshine shielding; (3) the models in MACCS related to early health effects are implemented correctly; and (4) model resolution may be improved by finer radial gridding. 32 refs., 5 tabs