JOPSS - Search Results

JAEA Reports

Development of denitration technique for MA-type bituminized waste product by aqueous leaching method

Irisawa, Keita; Komatsuzaki, Toshio; Kawato, Yoshimi; Sakakibara, Tetsuro; Nakazawa, Osamu; Meguro, Yoshihiro

JAEA-Technology 2015-008, 28 Pages, 2015/03

JAEA-Technology-2015-008.pdf:13.63MB

In JAEA, 16,671 drums of intermediate-radioactive bituminized waste products (BWPs) have been stored in asphalt solidification storages. As a way of reduction of uncertainty in assessment of disposal of the BWPs, a processing technique of separation of nitrate salts from the BWP by means of an aqueous leaching method was studied. As elemental techniques for the denitration process, (1) crushing techniques of a BWP and (2) denitration techniques for the crushed BWP by the aqueous leaching method were investigated. In order to promote leaching amounts of nitrates, the BWP was crushed, and the grain size distribution was investigated by sieving. Moreover, leaching behaviors of nitrate, nitrite and elements as radionuclides including in the BWP were investigated.

JAEA Reports

Development of refilling techniques of LA-type bituminized waste products

Irisawa, Keita; Komatsuzaki, Toshio; Kawato, Yoshimi; Sakakibara, Tetsuro; Nakazawa, Osamu; Meguro, Yoshihiro

JAEA-Technology 2014-039, 28 Pages, 2014/12

JAEA-Technology-2014-039.pdf:6.13MB

In JAEA, 13,296 drums of low-radioactivity bituminized waste products (BWPs) have been stored in asphalt solidification storages. In order to effectively utilize the space of the BWP in a repository site, we studied refilling techniques of the BWP from the drum to a box-shaped container. Tentative processes, which we devised, consisted of (1) take-off of BWP from the drum, (2) separation of a post filling part from BWP and (3) filling of BWP to a box-shaped container. Two methods for each process were selected, and work efficiencies of the methods were investigated by using a synthetic BWP.

Journal Articles

Limiting and breaking of fault current on fusion devices

Matsuzaki, Yoshimi

Denki Gakkai Gijutsu Hokoku, (709), p.54 - 58, 1999/01

no abstracts in English

Journal Articles

Limiting, controlling and interrupting of fault current in the tokamak device

Matsuzaki, Yoshimi; Aoyagi, Tetsuo; Watanabe, Kazuhiro; Isono, Takaaki; Miyachi, Kengo

SA-95-45,HV-95-128, 0, p.49 - 57, 1995/12

no abstracts in English

Journal Articles

Modifications to VME-bus system on thyristor controllers of the JT-60U power supplies

Aoyagi, Tetsuo; ; Matsuzaki, Yoshimi

Denki Gakkai Rombunshi, D, 115(1), p.13 - 20, 1995/00

https://doi.org/10.1541/ieejias.115.13

no abstracts in English

JAEA Reports

Preliminary design study of a steady state tokamak device

Miya, Naoyuki; *; Ushigusa, Kenkichi; Oikawa, Akira; Imai, Tsuyoshi; ; Nishitani, Takeo; Matsuzaki, Yoshimi; Kuriyama, Masaaki;

JAERI-M 92-140, 156 Pages, 1992/09

JAERI-M-92-140.pdf:4.19MB

no abstracts in English

JAEA Reports

Comparison between a steady-state fusion reactor and an inductively driven pulse reactor

*; Horiike, Hiroshi; Kuroda, Toshimasa*; Matsuzaki, Yoshimi; Shimomura, Yasuo; Sugihara, Masayoshi

JAERI-M 92-056, 53 Pages, 1992/04

JAERI-M-92-056.pdf:1.22MB

no abstracts in English

Journal Articles

New digital control systems of poloidal field power supplies for JT-60 upgrade

Matsuzaki, Yoshimi; Aoyagi, Tetsuo; ; ; *;

Fusion Technology 1990, p.1482 - 1486, 1991/00

no abstracts in English

Journal Articles

Fabrication and test of the Nb $_{3}$ Sn Demo Poloidal Coil(DPC-EX)

Ando, Toshinari; Hiyama, Tadao; Tsuji, Hiroshi; Takahashi, Yoshikazu; Nishi, Masataka; Tada, Eisuke; Yoshida, Kiyoshi; Okuno, Kiyoshi; Koizumi, Koichi; Nakajima, Hideo; et al.

Fusion Technology 1990, p.243 - 247, 1991/00

no abstracts in English

Journal Articles