Wet and dry deposition of Chernobyl releases

摘要: The passage of the Chernobyl plume over United Kingdom in May 1986 led to deposition radionuclides on ground by wet and dry processes. Here we analyse rainfall during published monitoring data obtained afterwards, show that levels deposited 137Cs can be closely related intercepting plume. was present atmosphere mostly as particulate species with mechanisms dominating. In contrast, 131I vapour phase material, reported grass cow's milk both were important. therefore shows a different geographic pattern 137Cs, is not so rainfall. We have calculated washout factors for locations where there are deposition, air concentrations From these interpolated atmosphere, total has been estimated at each 4,000 rain gauge stations Kingdom. results presented contours compared measurements parts country. Estimates less than or equal 1% releases from