Improved Passive Gamma Emission Tomography image quality in the central region of spent nuclear fuel.

ABSTRACT: Reliable non-destructive methods for verifying spent nuclear fuel are essential to draw credible nuclear safeguards conclusions from spent fuel. In Finland, spent fuel items are verified prior to the soon starting disposal in a geological repository with Passive Gamma Emission Tomography (PGET), a uniquely accurate method capable of rod-level detection of missing active material. The PGET device consists of two highly collimated detector banks, collecting gamma emission data from a 360° rotation around a fuel assembly. 2D cross-sectional activity and attenuation images are simultaneously computed. We present methods for improving reconstructed image quality in the central parts of the fuel. The results are based on data collected from 2017 to 2021 at the Finnish nuclear power plants with 1

SUBMITTER: Virta R 

PROVIDER: S-EPMC9304420 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature