Inventory of 238Pu and 239, 240Pu in the soil of Czechoslovakia in 1990

The cumulative deposition of 238Pu and 239, 240Pu by the end of 1990 in grassland, undisturbed for the last 40 years, was determined at 50 sites in Czechoslovakia. The cumulative deposition of 238Pu and 239, 240Pu ranged from ≈ 0.5 to 6.2 and from 10.2 to 108.2 Bq m−2, respectively. The mean value of the cumulative deposition of 238Pu and 239, 240Pu were 1.7 and 49.3 Bq m−2, respectively. No significant contribution to the cumulative deposition of 238Pu and 239,240Pu originating from the Chernobyl accident was found at any site and no significant decrease of 239, 240Pu at sites in the northwest parts of the Czech Republic with long-term, high incidence of acid rain was found either.