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Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Suzuki, Masahiro; Satone, Hiroshi*; Suzuki, Michitaka*
no journal, ,
To reduce the hold-up of the nuclear material in the glove box and the external exposure dose, the development of the technology of the powder adhesion prevention by the nanoparticle coating to the glove box component has been proceed. The adhesion between the uranium dioxide particles and the substrates of the acrylic, stainless steel and hypalon rubber, which was coated with nanoparticles using a silica nanoparticle-containing hydrophobic modifier was measured and evaluated. In the case of an acrylic substrate, it was found that the application of the coating significantly reduces the lower limit of the particle-substrate adhesion to about one tenth, and the adhesion preventing effect of the uranium dioxide powder can be obtained. This method is considered to be effective for the reduction of the hold-up of the nuclear material in the glove box and the external exposure dose.
Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Tokura, Ryoma*; Satone, Hiroshi*; Suzuki, Michitaka*
no journal, ,
To reduce the hold-up of the nuclear material in the glove box and the external exposure dose, the development of the technology of the powder adhesion prevention by the micro-fabrication and nanoparticle coating to the glove box component has been proceed. The prevention effect of powder adhesion and adhesion force of micro-fabricated stainless steel and acrylic, polycarbonate and stainless steel coated with nanoparticle were evaluated. The atomic force microscope was used for measuring the adhesion force between the unmodified and micro-fabricated stainless steel surface and the colloidal probe. In the case of unmodified, the adhesion force was about 2.03 nN, whereas when the micro-fabricated, the adhesive force was reduced to about 1.16 nN. This method is considered to be effective for the reduction of the hold-up of the nuclear material in the glove box and the external exposure dose.
Hayashizaki, Kohei; Omi, Koyo; Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Satone, Hiroshi*; Suzuki, Michitaka*
no journal, ,
To reduce the retention of the nuclear fuel materials in the glove box and the external exposure dose, the technology of the powder adhesion prevention by the surface micro-fabrication on the glove box components has been developed. In this study, a stainless steel specimen, which is a glovebox component material, was subjected to surface microfabrication, and measurements and evaluations were carried out concerning adhesion and powder adhesion prevention effects. A stainless steel specimen that was unmachined and several specimens with different surface roughnesses that had been micro-fabricated on their surfaces were used to perform surface roughness and adhesion measurement tests by atomic force microscopy. The average adhesion force tended to decrease as the surface roughness increased. In this study, it was found that surface micro-fabrication of stainless steel had a certain effect on preventing powder adhesion.