METHOD FOR ESTIMATION OF CONCENTRATION OF PLUTONIUM IN AIR OVER CONTAMINATED SOIL IN CONDITIONS OF ITS EQUILIBRIUM CONTENT IN SOIL-AIR MEDIUM Russian patent published in 2001 - IPC

FIELD: radiation hygiene, in particular, indirect determination of plutonium in air in the conditions of its equilibrium content in soil-air medium. SUBSTANCE: the method consists in measurement of the specific activity of plutonium in samples of soil surface, measurement of the load in mass and calculation of the product of the plutonium specific activity and load by mass. The plutonium specific activity in samples of soil surface is measured at a fixed depth, mainly equal to 5 cm, then using the measured parameter, the plutonium specific activity in air dust correlating with it is determined by formula: where: - plutonium specific activity in air dust, Bk•kg^-1, q0-5p

- plutonium specific activity in a fixed soil layer, 5 cm deep, Bk•kg^-1. EFFECT: enhanced accuracy of estimation of plutonium concentration in air, reduced cost of estimation. 2 cl, 1 tbl