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Miyazaki, Yasunori; Sano, Yuichi
Hoshasen Kagaku (Internet), (112), p.27 - 32, 2021/11
no abstracts in English
Kubo, Shinji; Yoshida, Mitsunori; Sakurai, Makoto*; Tanaka, Kotaro*; Miyashita, Reiko*
Bunri Gijutsu, 35(3), p.148 - 152, 2005/05
no abstracts in English
/He mixed gas under room temperatureTanzawa, Sadamitsu; Hiroki, Seiji; Abe, Tetsuya
Shinku, 46(3), p.154 - 157, 2003/03
no abstracts in English
Saito, Kyoichi*; *; *; Sugo, Takanobu
Kagaku Kogaku, 58(7), p.553 - 558, 1994/00
no abstracts in English
Sugo, Takanobu
Nihon Kaisui Gakkai-Shi, 47(4), p.235 - 241, 1993/00
no abstracts in English
Radioisotopes, 21(2), p.145 - 153, 1972/02
no abstracts in English
Fukaya, Yuji; Ohashi, Hirofumi
no journal, ,
Investigation on the reduction of HLW of HTGR have been performed. First, The number of waste packages and repository footprint of HLW of HTGR, which have an advantage in reduction of waste due to high burn-up and high thermal efficiency, were evaluated and compared with those of LWR. As a result, the number and footprint is reduced by 60% for direct disposal, and by 30% for disposal with reprocessing. Second, the disposal method and scenario are optimized for HLW of HTGR. With horizontal emplacement and extending cooling time of 40 years, the repository footprint is reduced by 50% for direct disposal, and by 80% for disposal with reprocessing. Furthermore, the number of waste packages can be reduced by 60% with partitioning, the repository footprint can be reduced by 90% with horizontal emplacement and extended cooling time about 150 years.
Yamaguchi, Akira*; Matsumura, Tatsuro; Ikeda, Takao*
no journal, ,
no abstracts in English
Sasaki, Yuji; Matsumiya, Masahiko*
no journal, ,
In Japan, the decreases of radioactive waste and its toxicity in HLW are noticed. Thus we need to recover Cs and Sr of heat source and Mo and platinum group metals of limiting factor to produce solidified glass, and treat them by proper method. From these ideas, it is important to develop the four-group partitioning process that JAEA conducted energetically. We focus on the recovery of actinides and fission products by solvent extraction method, and explain the outline in this conference.
Sugawara, Takanori
no journal, ,
JAEA has set the following three items as the pillars of research and development; (a) Nuclear 
Renewable synergy, (b) Making nuclear energy itself sustainable, and (c) Diversification of nuclear energy use (Ubiquitous). In particular, to make the use of nuclear energy sustainable, research and development on recycling of radioactive waste has been initiated. In this presentation, the following three contents will be presented; (1) the use of unburnable uranium in storage batteries, (2) the use of elements in spent fuel, and (3) power generation from heat and radiation. In addition, ideas for recycling that may be related to nuclear data will be introduced.
