Evaluation of a Long Range Particle-in-Cell Transport and Diffusion Model Based on an Analysis of the Chernobyl Reactor Accident [open pdf - 419KB]
"Work described in this presentation was accomplished over an eighteen month period after the Chernobyl accident, during which time model calculations were compared to environmental measurements supplied by the WHO as well as several individual countries. Results of these calculations and comparisons to measurements have been published in several reports with the most complete description of these studies provided by Lange, 1988. Using the source term data shown in Table 1, the spatial distribution of material released from the Chernobyl reactor is shown by Figure 1. After four days (Figure 1.b) material is moving in three major directions: (1) the lowest layer, within the first 1500m, is dispersed over Eastern Europe and Scandinavia, (2) another large collection of particles located above about 4 km are moving toward the Middle East, and (3) the third group of particles are moving east toward Japan. By day 10 (Figure 1.d) material has reached the western United States and is spreading over most of the Northern Hemisphere with the exception of eastern North America"
National Atmospheric Release Advisory Center: https://narac.llnl.gov/
Evaluation of Atmospheric Dispersion Models Applied to the Release from Chernobyl. Vienna, Austria. November 14-16, 1988