ISIS Neutron and Muon Source Data Journal

Structure determination of compounds for the immobilisation of Iodine-129 and Technetium-99

Abstract: 99Tc (half life 2.13 x 105 years) and 129I (half life 15.7 x 106 years) are abundant and long lived products of nuclear fission, with yields of 6% and 0.7% respectively for thermal fission of 235U. These radionuclides are of particular concern in closed nuclear fuel cycles, since the long half life and high production rate, combined with solubility and bioaccumulation. Future advanced nuclear fuel recycle strategies demand disposition of 99Tc and 129I in a robust wasteform, and isolation from the bio-sphere, in a deep geological disposal facility for 10E6 - 10E7 years. We have endeavoured to address this challenge, exploring the synthesis, structure and properties of ceramics for 129I and 99Tc disposition. Here, we propose to determine the structures of seven such ceramic compounds, within three families, using neutron powder diffraction, with natural isotopic abundance I and 99Tc.

Principal Investigator: Dr Neil Hyatt
Experimenter: Miss Sarah O'Sullivan
Local Contact: Dr Ronald Smith
Experimenter: Dr Martin Stennett
Experimenter: Dr Shikuan Sun
Experimenter: Dr Daniel Bailey

DOI: 10.5286/ISIS.E.RB1920341

ISIS Experiment Number: RB1920341

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Neil Hyatt et al; (2020): Structure determination of compounds for the immobilisation of Iodine-129 and Technetium-99, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920341

Data is released under the CC-BY-4.0 license.