Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Goto, Ichiro; Kofuji, Hirohide; Oriuchi, Akio; Watanabe, So; Takeuchi, Masayuki
Proceedings of 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017) (CD-ROM), 6 Pages, 2017/04
JAEA has been working on partition of minor actinides from high-level liquid wastes (HLLW) generated in the reprocessing by extraction chromatography technology. This technology utilizes 50 micro m porous silica particles coated by styrene-divinylbenzene copolymer in which an extractant for MA recovery is impregnated as adsorbent. Adsorption/elution performance of the adsorbent depends on sizes of the particle and pore of the particle. In this study, spray drying granulating experiments with various operating conditions and with different experimental apparatuses were carried out to find an appropriate condition to control the sizes of the particle and the pore.
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Nagai, Takayuki; Sasage, Kenichi
no journal, ,
no abstracts in English
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi
no journal, ,
Vitrification procedure for the extraction chromatography using porous silica covered with extractant were examined. In this method, it was expected that minor actinide (MA) were separated from high level radioactive liquid waste using extractant CMPO and/or HDEHP. In this study, vitrified adsorbent with simulated high level liquid waste were prepared and evaluated from some viewpoints of high level waste form properties. As the results, selected adsorbent were generally well vitrified and had enough chemical durability.
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi
no journal, ,
no abstracts in English
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi
no journal, ,
The extraction chromatography technique has been developed as the minor actinides (MA) recovering method from high radioactive liquid waste generating in the reprocessing process. MA adsorbent was made of porous silica covered with polymer and MA extractant, therefor it could be used as the raw material of vitrified high level waste directly and final waste volume could be drastically reduced. In this study, the vitrification properties were evaluated for the silica based adsorbent containing polymer, extractant and waste simulant.
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi
no journal, ,
no abstracts in English
Kofuji, Hirohide; Watanabe, So; Goto, Ichiro; Oriuchi, Akio; Takeuchi, Masayuki; Kobayashi, Hidekazu; Sasage, Kenichi
no journal, ,
Vitrification procedure for extraction chromatography using porous silica particles covered with extractant was investigated. In this method, minor actinides (MAs) were separated from high-level radioactive liquid waste by extractant CMPO and/or HDEHP. In this study, thermal degradation behavior and vitrification properties were evaluated from the viewpoints of high-level wasteform properties using porous silica adsorbent impregnated with extractant CMPO and HDEHP. As the results of various experiments, suitable vitrification procedure for MA/RE adsorbents was clarified and selected adsorbent was generally well-vitrified and had enough chemical durability.