Patent ID: 8536515

Claim:
A method for determining a radiation dose emitted in a real or simulated way by a source of fissile material in an installation, characterized in that it comprises the following steps: using one or more dosage sensors distributed in the installation to obtain measurements indicative of fission in the installation, using a computer to: determine the number of fissions which occur, versus time, in the fissile material of the source, determine attenuation coefficients of the materials which form the vertical walls and the floors of the installation and more generally, of any screen which may be placed on the trajectory of the emitted radiation, determine from descriptive geometrical data of the installation between a source plane (P E ) substantially perpendicular to the vertical walls of the installation and which contains a point source (E) representative of the radiation source and a viewing plane (P V ) parallel to the source plane, a set of characteristic planes (P j ) perpendicular to the source plane and each containing the point source (E) and at least one junction edge between two vertical walls of the installation; angularly scan (θ) the characteristic planes around an axis (Z p ) perpendicular to the source plane and passing through the point source (E) in order to define at least one calculation plane (P C ); determine for the calculation plane, a set of characteristic lines (Q j ), each characteristic line passing through the point source (E) and through at least one point located at the junction of two junction edges; on a calculation line (D) located at the intersection of the viewing plane and of the calculation plane, determine positions of intersection points between the calculation line and the characteristic lines; among the intersection points present on the calculation line, selecting intersection points Δ j located in open air zones of the installation; calculate the radiation dose d(Δ j ) present in each point Δ j , from the number of fissions versus time, from a distance which separates the point source (E) from the point Δ j and from attenuation coefficients of the constitutive materials of the verticals walls and/or floors and/or of any screen separating the point source (E) from the point Δ j .