METHOD OF DETERMINING RADIATION ENVIRONMENT AFTER EMISSION OF RADIOACTIVE SUBSTANCES INTO ATMOSPHERE Russian patent published in 2013 - IPC G01T1/169 

FIELD: physics.

SUBSTANCE: in order for the cloud projection to indicate the contaminated region with radiation levels higher than the minimum hazardous dose rate of gamma-radiation, the critical value of the level of an echo signal is used when constructing cloud boundaries from probing results, wherein distribution of radiation levels is approximated and the maximum dose rate of gamma-radiation P_(M)1 and the dose rate field dispersion σ_(P)1 ² along g_i are established; coefficients are determined; radiation level distribution parameters along lines g₁, which are orthogonal projections of lines ℓ_i on the earth's surface are predicted; P_(M)i=K_аJ_(М)i; where i≥2, on each line g_i at a distance where P_gr is the gradient value of the safe dose rate of gamma-radiation, from the projection of the centre of the cloud (x_ci, y_ci); points A_i and B_i are determined; the boundary of the area of radioactive contamination is determined sections A_IB_I, A_nB_n, as well as A_iA_i+1, B_iB_i+1, where i≥1.

EFFECT: shorter time for determining the real environment using the available amount of equipment.

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