Probability safety assessment (PAS-Level 13) and emergency planning

To assess the radiological and health consequences of hypothetical accidents of Paks NPP the PC COSYMA program Divas used. Probabilistic runs with cyclic sampling (using 144 samples) have been carried out. In the calculations 16 sectors (22.5 degrees each) and 10 distance bands (from 0.4 to 450 km) were used. Detailed calculations were performed on the border of an exclusion zone of 3 km around the reactor. Whenever the estimated maximum value of early dose exceeded the [units of countermeasure criteria, the impact of protective measures on the early and late health effects have also been calculated. The code has been previously adapted to Hungarian circumstances (using site specific data on meteorology and population). The DATA library of PC COSYMA is filled with actual data on agricultural productivity using a grid of 10 km x 10 km taken from the Statistical Yearbook of Hungary. (author)