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<p>This study investigated the development of a new cementitious waste form for stabilizing the radioactive liquid waste containing boric acid enriched in <sup>10</sup>B isotope (<sup>10</sup>B-EBA), an advanced neutron-absorbing material used to control nuclear fission reactions in nuclear power plants (NPPs). This was compared with natural boric acid (<sup>11</sup>B-NBA). Cementitious specimens were prepared using Portland cement (PC), boric acid (BA), and caesium chloride (CsCl). Leachability tests followed the ASTM C1308-08_2017 protocol. The elemental composition of the leachates was determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES), and the mineralogical analysis of the solidified matrices was conducted by X-ray diffraction (XRD). The mineral phase development was also examined using scanning electron microscopy (SEM). The findings show that both caesium incorporation and boron enrichment significantly influence the mineralogy and leaching characteristics of cementitious waste forms. Cement specimens made with NBA showed higher leachability of the main cementitious elements (Ca, Si, S) and B than those made with <sup>10</sup>B-EBA.</p>

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Leaching characteristics of cementitious matrices containing B-10 enriched boric acid and caesium

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Emanuel Nkotya,
  • Aldo Kitalika,
  • Mojtaba Rostamiparsa,
  • Gabriel Iklaga,
  • Csaba Szabó,
  • Péter Völgyesi,
  • Zsuzsanna Szabó-Krausz

摘要

This study investigated the development of a new cementitious waste form for stabilizing the radioactive liquid waste containing boric acid enriched in 10B isotope (10B-EBA), an advanced neutron-absorbing material used to control nuclear fission reactions in nuclear power plants (NPPs). This was compared with natural boric acid (11B-NBA). Cementitious specimens were prepared using Portland cement (PC), boric acid (BA), and caesium chloride (CsCl). Leachability tests followed the ASTM C1308-08_2017 protocol. The elemental composition of the leachates was determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES), and the mineralogical analysis of the solidified matrices was conducted by X-ray diffraction (XRD). The mineral phase development was also examined using scanning electron microscopy (SEM). The findings show that both caesium incorporation and boron enrichment significantly influence the mineralogy and leaching characteristics of cementitious waste forms. Cement specimens made with NBA showed higher leachability of the main cementitious elements (Ca, Si, S) and B than those made with 10B-EBA.