Passive neutron albedo reactivity measurements of spent nuclear fuel

نویسندگان

چکیده

The upcoming disposal of spent nuclear fuel in Finland creates new challenges for safeguards. Part the national safeguards concept geological repositories, developed by STUK — Radiation and Nuclear Safety Authority, is non-destructive assay (NDA) verification all items before disposal. proposed system a combination PGET (Passive Gamma Emission Tomography), PNAR Neutron Albedo Reactivity) weight measuring NDA-instruments. takes pin-level image fission products inside assembly verifies multiplication assembly, quantity that correlates with fissile content. approved IAEA (International Atomic Energy Agency) measurements, but feasibility has not yet been established. A first its kind prototype instrument was built collaboration coordinated STUK. This paper concludes results measurements BWR (Boiling Water Reactor) July 2019. Based on ability to detect presence material repeatable manner reasonable amount time demonstrated. Furthermore, able differences between partially fully assemblies, axial within single assembly.

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ژورنال

عنوان ژورنال: Nuclear Instruments and Methods in Physics Research

سال: 2021

ISSN: ['1872-9576', '0168-9002']

DOI: https://doi.org/10.1016/j.nima.2020.164707