In this work, KINAC demonstrates the feasibility of using neutron interrogation in safeguards and verification of spent nuclear fuel (SNF) in a dry canister. In particular, they adopted a tomographic approach to explore the unique signatures of emitted neutrons for dry cask inspection through a lab-scale demonstration.
The Arktis S670e He-4 scintillation detectors with borated polyethylene collimators were utilized to measure neutrons. A 1/ 10 th model cask was also built to mock-up the dry cask and a 252 Cf source was placed inside the model cask as a test bench. While having 252 Cf source inside the cask, the projection data were collected from 0° to 360° at 10° interval. Then, a MATLAB script was used to perform image reconstruction through the filtered back projection. Finally, MCNP simulation was performed to intercompare the experimental results with computational ones.