Monitoring spent nuclear fuel repositories with passive gamma emission tomography

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• Tatiana Alessandra Bubba (University of Bath)
• Tuesday 16 May 2023, 16:00-17:00
• Seminar Room 1, Newton Institute.

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RNTW03 - New tomographic methods using particles

Verification of spent nuclear fuel is a prerequisite for disposal in a geological repository. The verification method needs to be reliable and quick and allow non-destructive investigation of the fuel assemblies to ensure the integrity of the fuel prior to disposal. Recently IAEA has approved Passive Gamma Emission Tomography (PGET) to be used as a tool in rod-level examination of assemblies. In this talk, I propose a method based on simultaneous reconstruction of activity and attenuation images with sufficient prior information, formulating the reconstruction as a constrained minimization problem with a data fidelity term and regularization terms. The approach is shown to produce clear reconstructions which allow for a highly reliable classification of spent, missing, and fresh fuel rods. Several reconstruction examples from measured data will be presented in the talk.

This talk is part of the Isaac Newton Institute Seminar Series series.

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