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JAEA Reports

Changes in tensile property and X-ray parameter for carbon fiber after high temperature heat-treatment

Saito, Tamotsu; Baba, Shinichi; Eto, Motokuni

JAERI-Research 99-070, p.21 - 0, 2000/01

JAERI-Research-99-070.pdf:1.32MB

no abstracts in English

JAEA Reports

Basic characteristics of radiophotoluminescence glass dosimeter

*; Murakami, Hiroyuki

JAERI-Tech 94-034, 43 Pages, 1994/12

JAERI-Tech-94-034.pdf:1.65MB

no abstracts in English

Journal Articles

Thermal aging and steam exposure effect on electrical insulation resistance for EPR irradiated by $$gamma$$-ray in vaccum and in oxygen under

; Seguchi, Tadao; Yoshida, Kenzo

EIM-84-136, p.75 - 84, 1984/00

no abstracts in English

Journal Articles

Fusibility of poly(N-carboxy $$alpha$$-amino acid anhydride)materials treated under pressure-heat conditions and in vitro-in vivo degradation of hot-pressed materials

Asano, Masaharu; ; Kaetsu, Isao; *; *; *; *

J.Macromol.Sci.,Part A, 21(5), p.561 - 582, 1984/00

no abstracts in English

Journal Articles

JAEA Reports

Crosslinking of Polyvinyl Alcohol Film by Irradiation

*; Yamaguchi, Koichi; Machi, Sueo

JAERI-M 6068, 16 Pages, 1975/03

JAERI-M-6068.pdf:0.58MB

no abstracts in English

Oral presentation

Advantages of molten salt processing for volume reduction of Cs-contaminated soil; Structure change of weathered biotite by the reaction with NaCl-CaCl$$_{2}$$ mixed salt

Shimoyama, Iwao; Honda, Mitsunori; Kogure, Toshihiro*; Okamoto, Yoshihiro; Yaita, Tsuyoshi; Suzuki, Shinichi

no journal, , 

X-ray fluorescence (XRF) and X-ray diffraction (XRD) were employed to study bulk composition and structure changes of weathered biotite (WB) before and after low-pressure sublimation processing with NaCl-CaCl2 mixed salt. XRF showed that almost all Cs was desorbed from Cs-saturated WB after heating at 700 $$^{circ}$$C under a low-pressure (14 Pa) and XRD showed that WB disappeared and augite appeared as the dominant product. We propose a new idea, Cs-free mineralization method, for reduction of Cs-contaminated soil in Fukushima based on these results.

Oral presentation

Proposition of Cs free mineralization for reduction and reuse of contaminated soil

Shimoyama, Iwao; Honda, Mitsunori; Kogure, Toshihiro*

no journal, , 

The decontamination method has not been established for soil contaminated with radioactive Cs. We adopted weathered biotite (WB) which sorbed non-radioactive $$^{133}$$Cs as a model contaminated soil and applied heating treatment to the WB at 700$$^{circ}$$C under a low pressure condition of 14 Pa with NaCl-CaCl$$_{2}$$ mixed salt. X-ray fluorescence analysis showed that almost all Cs and K were removed from the sample at 700$$^{circ}$$C and Ca became dominant with temperature. X-ray diffraction spectra largely changed after the heating treatment indicating some phase transition from WB. Transmission electron microscopy analysis clarified that augite was the dominant product after the heating treatment at 700$$^{circ}$$C. These results suggest a model that Ca derived from the mixed-salt induced the formation of augite, and that K$$^{+}$$ and Cs$$^{+}$$ were eliminated from the product as these large-size cations cannot constitute augite. Based on this model, we propose Cs free mineralization which can achieve decontamination and reuse of soil in Fukushima.

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