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Journal Articles

Current status of R&D activities and future plan and role of JAEA's two generic URLs

Koide, Kaoru; Osawa, Hideaki; Ito, Hiroaki; Tanai, Kenji; Semba, Takeshi; Naito, Morimasa; Sugihara, Kozo; Miyamoto, Yoichi

Annual Waste Management Symposium (WM 2015), Vol.5, p.3631 - 3645, 2015/00

JAEA has promoted R&D on HLW geological disposal technology. JAEA launched the Mizunami and the Horonobe URL Projects to cover the diversity of geological environments in Japan. The Mizunami URL Project is a geoscientific research project in the crystalline rock environment. The Horonobe URL Project consists of geoscientific studies and R&D on geological disposal technology in the sedimentary rock environment. Both URL projects have been planned to proceed in three overlapping phases, Surface-based investigation Phase, Construction Phase and Operation Phase. Currently, the construction of research galleries in both of the Mizunami and the Horonobe URLs has been completed to 500 m and 350 m depths, respectively. JAEA will promote R&D activities in Phase III including study of the long-term evolution of the geological environment, and contribute to international cooperation, development of human resources and communication amongst stakeholders through both URL projects.

Journal Articles

Performance improvements of H$$_{2}$$ production reactor for open-cycle thermochemical IS process

Kubo, Shinji; Onuki, Kaoru; Naito, Masaaki*; Tachibana, Yukio

Nihon Kikai Gakkai 2009-Nendo Nenji Taikai Koen Rombunshu, Vol.3, p.151 - 152, 2009/09

Merits of open-cycle thermochemical processes are characterized as compared with closed-cycle thermochemical processes to make water-splitting by unnecessity of high-temperature equipments, acceptable low thermal efficiency than water electrolysis to produce hydrogen, and conversions of unwanted materials into valuable materials. This study focuses a open cycle process to produce hydrogen and sulfuric acid from water and sulfur dioxide which is obtained from sulfur of general industry wastes. Improvement of hydrogen iodide decomposition rate by absorptions of reactant of iodine into active carbon was adapted to measure thermal burden on hydrogen production section. A heat requirement to drive a hydrogen production reactor with active carbon was estimated to be 194 kJ/mol-H$$_{2}$$, thereby heat input of total process was reduced from 6380 without active carbon to 1480 kJ/mol-H$$_{2}$$ with that.

Journal Articles

Progress towards the establishment of integrated safeguards in Japan

Naito, Kaoru; Ogawa, Tsuyoshi*; Osabe, Takeshi*

Proceedings of 42nd INMM Annual Meeting, 12 Pages, 2001/00

no abstracts in English

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