[en] Highlights: • Quantitative thermal imaging for Intermediate Level Waste container “fingerprinting”. • Determination of Intermediate Level Waste container internal temperatures. • Reliable determination of Special Nuclear Material containers surface temperature. • Non-radiance surface thermometry for the long term monitoring of SNM containers. • Remote identification of anomalous temperature 3 m³ ILW packages in stores. Many established nuclear power producing countries are currently decommissioning first and increasingly second-generation power producing plants and fuel processing facilities. This has led to a growing inventory of different containers and packages containing radioactive waste and other nuclear materials, as well as storage of spent fuel. Here we describe research to establish in-situ yet remote health monitoring techniques based on novel temperature measurement methods for different containers and racks used to hold different nuclear waste forms, special nuclear materials and spent fuel.

[en] This paper describes the steps taken to assess the potential of a solvent extraction process for separating plutonium from neptunium. The plutonium, namely ²³⁸Pu, is of importance because it is the isotope used in making radioisotope thermoelectric generators and radioisotope heaters and is obtained by irradiating ²³⁷Np targets in a high neutron flux environment. After the neptunium targets have been irradiated, the targets could then be processed by solvent extraction methods