Neutron Methods for Detecting Enriched Uranium in a Sample

Abstract

We considered the main passive and active neutron methods for detecting fissile material in a sample which are used for example, in inspection installations and in the control of waste from the nuclear fuel cycle. Calculations are presented to assess the possibilities of using these methods to detect enriched uranium. The Differential die away analysis is considered in detail. A model has been developed for detecting the presence of U²³⁵ in a sample by using DDAA with Geant4 [1] software package. In the developed model, a criterion for determining the mass of U²³⁵ is proposed and verified. The proposed model and criterion can significantly simplify the process of developing and optimizing the parameters of expensive devices for detecting fissile substances by creating a digital model.