Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Suzuki, Masahiro; Tachihara, Joji; Takato, Kiyoto; Okita, Takatoshi; Satone, Hiroshi*; Suzuki, Michitaka*
Mechanical Engineering Journal (Internet), 8(3), p.21-00022_1 - 21-00022_9, 2021/06
To reduce the hold-up of the nuclear fuel materials in the glove box and the external exposure dose, the technology of the MOX powder adhesion prevention by the nanoparticle coating to the acrylic panels of the glove box has been developed. The surface analysis by means of atomic force microscopy (AFM) showed that the acrylic test piece surface coated with nanoparticles had a higher root mean square roughness value than that non-coated with nanoparticles. Due to the formation of nano-sized tiny rugged surface, the nanoparticle coating reduced the minimum adhesion force between the UO
particles and the acrylic test piece surface with the smallest particle size of about 5 
m where desorption was observed, by about one-tenth. Moreover, the nanoparticle coating reduced the amount of the MOX powder adhering to the acrylic test piece to about one-tenth. In this study, it was found that applying the nanoparticle coating to the acrylic panels of glove box can prevent the adhesion of nuclear fuel materials. This method is effective for reducing the hold-up of the nuclear fuel materials in the glove box, the external exposure dose and improving the visibility of the acrylic panels.
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.
