Abstract
An idea is presented in which passive gamma emission tomography of irradiated nuclear fuel is developed to enable quantitative information of the spatial activity distribution of selected isotopes within the fuel rods of the assembly. The idea is based on using well-known calibration sources mounted in the measurement device during measurement. The image reconstruction would include the sources, thereby enable quantification of the activity distribution. Should the idea be proven viable, the outcome would be valuable to the global community dealing with characterisation of nuclear fuel in terms of safety, security, safeguards and fuel development.
Highlights
One reason why passive gamma emission tomography is useful for nuclear fuel characterisation is that the measurements can be performed non-destructively without touching or dismantling the fuel assembly
For passive gamma emission tomography applied to nuclear fuel, the images produced in the mathematical reconstruction of the measurement data are usually of a qualitative or relative nature
Backholm et al (2020) have tested simultaneous reconstruction of the spatial distributions of both attenuation and activity, still producing images with relative data used for classification of the presence or absence of a nuclear fuel rod
Summary
One reason why passive gamma emission tomography is useful for nuclear fuel characterisation is that the measurements can be performed non-destructively without touching or dismantling the fuel assembly. For passive gamma emission tomography applied to nuclear fuel, the images produced in the mathematical reconstruction of the measurement data are usually of a qualitative or relative nature.
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