Use of high energy gamma emission tomography for partial defect verification of spent fuel assemblies. Final report on the Task FIN A98 of the Finnish Support Programme to IAEA Safequards

摘要

The possibility to use passive gamma emission tomography for revealing non-destructively the rod structure of spent BWR fuel assemblies has been studied in cooperation with the Finnish Support Programme to the IAEA Safeguards (task FIN A98) and the Technical University of Budabest in Hungary. The ultimate goal is to develop partial verification methods for verification of spent nuclear fuel. The task included experimental measurements of irradiated BWR assemblies using underwater measurement techniques together with computer analysis of the measured data as well as computer simulation of tomographic measurements. The results obtained show that rod-level partial defect verification of spent LWR fuel assemblies is feasible using computed gamma emission tomography. This report describes the results of this project. (orig.). (7 refs., 29 figs., 2 tabs.). (Atomindex citation 25:037535)