For a safe, economic and ecological final disposal of spent nuclear fuel (SNF), the fuel has to be characterised for decay heat, neutron and gamma-ray emission rate and reactivity. The main challenge of final depositories is to predict these characteristics in timescales from post-irradiation to millennia. This requires a full confidence in the predictive power of the theoretical models and simulation tools, including the nuclear data. In addition, the predictions strongly rely on the correctness of the declared history of the assembly.
Within this framework we aim at understanding how the neutron emission of a spent fuel pellet, originating from an assembly with well-known original characteristics and history, can be used to validate part of the nuclear data and to verify the declared history of a SNF. Therefore, the development of a dedicated neutron detection device and signal processing algorithms are needed and being developed within a SCK•CEN – JRC collaboration.