Photofission tomography of nuclear waste packages

Being able to characterize and classify nuclear waste packages is crucial for an appropriate mode of storage. The alpha-activity due to the presence of actinides inside the packages can be determined using non-destructive active (NDA) methods. CEA-LIST is developing one of those, based on fission induced by photons that allows us to quantify the global mass of actinides in large concrete packages and localize it by the means of a tomography using delayed particles emitted after the fission process.