Development of a mobile modular system for the detection of special nuclear material (MODES-SNM)

The project MODES-SNM, Modular DEtection System for Special Nuclear Material, is presented in this paper. Its main objective is the development of a mobile and modular detection system specially designed for SNM, i.e. highly enriched Uranium and weapon grade Plutonium, but with the capability of detecting and identifying radioactive sources. The MODES-SNM prototype is defined as a Portable Radiation Scanner following the IAEA classification that can be used in primary or secondary lines of control depending on the operational need as fixed or mobile system. High pressure noble gas scintillation detectors for neutrons and gamma rays are employed in the detection system.