Microscopic structural analysis of lead borate-based glass

Atsushi Mukunoki, Tamotsu Chiba, Yasuhiko Benino, Tomofumi Sakuragi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The development of an iodine immobilization technique that can retain radioactive iodine in a waste form for a long period and constrain its leaching into pore water is necessary in order to secure the long-term safety of geological disposal of transuranic waste. Lead borate glass vitrified at a low temperature is regarded as a promising material for immobilizing the Iodine-129 that is recovered from spent AgI filters used in reprocessing plants in Japan. Structural models of lead borate-based glass were constructed by the Reverse Monte Carlo (RMC) method based on experimental information from such sources as neutron and high-energy X-ray diffraction, XAFS, and 11B MAS NMR spectroscopic analyses. The neutron structure factors [SN(Q)] and X-ray structure factors [SX(Q)] that were calculated by RMC and measured by J-PARC/MLF-BL20 and SPring-8/BL04B2 suggest that RMC results are consistent with experimental measurements and reveal that structural information of neutrons is indispensable for analyzing the surrounding boron structures.

Original languageEnglish
Pages (from-to)339-344
Number of pages6
JournalProgress in Nuclear Energy
Volume91
DOIs
Publication statusPublished - Aug 1 2016

Keywords

  • Iodine
  • Lead borate glass
  • Neutron structure factor
  • Reverse Monte Carlo method

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Waste Management and Disposal
  • Safety, Risk, Reliability and Quality

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