Leachability and Thermal Properties of Ceramic Solid Forms Immobilizing Cesium and/or Strontium

Hitoshi Mimura; Teppei Hirabayashi; Masaki Ozawa

Leachability and Thermal Properties of Ceramic Solid Forms Immobilizing Cesium and/or Strontium

Hitoshi Mimura, Teppei Hirabayashi, Masaki Ozawa

ENG - Quantum Science and Energy Engineering

Research output: Contribution to conference › Paper

Abstract

Solid forms immobilizing nuclides were prepared from Cs-mordenite and Sr-A zeolite by calcination at 1,200°C for 1 h. Cesium and strontium were fixed in the crystal phases of pollucite (CsAlSi₂O₆) and Sr-feldspar (SrAl₂Si₂O₈), respectively. The leachability of Cs and Sr was rather high in 0.1 M HNO₃ leachant, while the leached percentage was lowered in 0.1 M NaOH, 0.1 M NaCl and deionized water. The recrystallized phases formed on the surface after leaching in 0.1 M NaOH resulted in the lowering of the leachability of Cs and Sr. The thermal conductivities (k) of solid forms of Cs-MOR, Sr-A, (Cs,Sr)-A and Al-matrix (calcined Cs-mordenite dispersed in Al metal matrix) were determined to be 0.83-1.00, 0.55-0.64, 0.83-1.01 and 47 W/(m·K), respectively. The central temperature of solid forms with the same diameter was in the order of Sr-A > Cs-MOR > Al-matrix.

Original language	English
Pages	615-622
Number of pages	8
Publication status	Published - 2003 Dec 1
Event	International Conference - Nuclear Energy for New Europe 2003, Proceedings - Portoroz, Slovenia Duration: 2003 Sep 8 → 2003 Sep 11

Other

Other	International Conference - Nuclear Energy for New Europe 2003, Proceedings
Country	Slovenia
City	Portoroz
Period	03/9/8 → 03/9/11

ASJC Scopus subject areas

Nuclear Energy and Engineering

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Mimura, H., Hirabayashi, T., & Ozawa, M. (2003). Leachability and Thermal Properties of Ceramic Solid Forms Immobilizing Cesium and/or Strontium. 615-622. Paper presented at International Conference - Nuclear Energy for New Europe 2003, Proceedings, Portoroz, Slovenia.

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title = "Leachability and Thermal Properties of Ceramic Solid Forms Immobilizing Cesium and/or Strontium",

abstract = "Solid forms immobilizing nuclides were prepared from Cs-mordenite and Sr-A zeolite by calcination at 1,200°C for 1 h. Cesium and strontium were fixed in the crystal phases of pollucite (CsAlSi2O6) and Sr-feldspar (SrAl2Si2O8), respectively. The leachability of Cs and Sr was rather high in 0.1 M HNO3 leachant, while the leached percentage was lowered in 0.1 M NaOH, 0.1 M NaCl and deionized water. The recrystallized phases formed on the surface after leaching in 0.1 M NaOH resulted in the lowering of the leachability of Cs and Sr. The thermal conductivities (k) of solid forms of Cs-MOR, Sr-A, (Cs,Sr)-A and Al-matrix (calcined Cs-mordenite dispersed in Al metal matrix) were determined to be 0.83-1.00, 0.55-0.64, 0.83-1.01 and 47 W/(m·K), respectively. The central temperature of solid forms with the same diameter was in the order of Sr-A > Cs-MOR > Al-matrix.",

author = "Hitoshi Mimura and Teppei Hirabayashi and Masaki Ozawa",

year = "2003",

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day = "1",

language = "English",

pages = "615--622",

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T1 - Leachability and Thermal Properties of Ceramic Solid Forms Immobilizing Cesium and/or Strontium

AU - Mimura, Hitoshi

AU - Hirabayashi, Teppei

AU - Ozawa, Masaki

PY - 2003/12/1

Y1 - 2003/12/1

N2 - Solid forms immobilizing nuclides were prepared from Cs-mordenite and Sr-A zeolite by calcination at 1,200°C for 1 h. Cesium and strontium were fixed in the crystal phases of pollucite (CsAlSi2O6) and Sr-feldspar (SrAl2Si2O8), respectively. The leachability of Cs and Sr was rather high in 0.1 M HNO3 leachant, while the leached percentage was lowered in 0.1 M NaOH, 0.1 M NaCl and deionized water. The recrystallized phases formed on the surface after leaching in 0.1 M NaOH resulted in the lowering of the leachability of Cs and Sr. The thermal conductivities (k) of solid forms of Cs-MOR, Sr-A, (Cs,Sr)-A and Al-matrix (calcined Cs-mordenite dispersed in Al metal matrix) were determined to be 0.83-1.00, 0.55-0.64, 0.83-1.01 and 47 W/(m·K), respectively. The central temperature of solid forms with the same diameter was in the order of Sr-A > Cs-MOR > Al-matrix.

AB - Solid forms immobilizing nuclides were prepared from Cs-mordenite and Sr-A zeolite by calcination at 1,200°C for 1 h. Cesium and strontium were fixed in the crystal phases of pollucite (CsAlSi2O6) and Sr-feldspar (SrAl2Si2O8), respectively. The leachability of Cs and Sr was rather high in 0.1 M HNO3 leachant, while the leached percentage was lowered in 0.1 M NaOH, 0.1 M NaCl and deionized water. The recrystallized phases formed on the surface after leaching in 0.1 M NaOH resulted in the lowering of the leachability of Cs and Sr. The thermal conductivities (k) of solid forms of Cs-MOR, Sr-A, (Cs,Sr)-A and Al-matrix (calcined Cs-mordenite dispersed in Al metal matrix) were determined to be 0.83-1.00, 0.55-0.64, 0.83-1.01 and 47 W/(m·K), respectively. The central temperature of solid forms with the same diameter was in the order of Sr-A > Cs-MOR > Al-matrix.

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