TOMOGRAPHY USING NEUTRON RADIOGRAPHY PHOTOGRAPHS FOR A BEAM OF SEVERAL FUEL PINS

A method of tomography by neutron radiography has been developed at the Centre d’Etudes Nucleaires de Grenoble (Grenoble Centre for Nuclear Studies) with a view to examining beams of several fuel pins during irradiation. During this study, the emphasis was made principally on establishing a physical model of the neutron radiography measurements, so as to enable appropriate codes of reconstruction to be written. We also studied the conditions for use of classical reconstruction codes after appropriate processing of the readings.