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JAEA Reports

Experiments of sodium nitrate liquid waste treatment by biological method

Takahashi, Kuniaki; Meguro, Yoshihiro; Kawato, Yoshimi; Kuroda, Kazuhiko*; Ogawa, Naoki*

JAEA-Technology 2008-084, 12 Pages, 2009/02

JAEA-Technology-2008-084.pdf:1.06MB

Low level liquid waste discharged from a Reprocessing Facility includes sodium nitrate. In the case that it is directly solidified with cement and so on and then the solidified waste are disposed under the ground, sodium nitrate soaks into the environment through underground water layer. We planned to apply the biological treatment system that many ordinary industrial plants are running in the field of waste water treatment to reduce nitrate. We carried out degradation experiments of nitrate for 4wt% sodium nitrate solution by biological method. To solve the assignments that biological treatment technology has, we tested and obtained the results as shown below; (1) The amount of sludge ash could be cut down a tenth as much as usual. The disposal cost reduction of secondary waste is just in sight. (2) Treatment performance could be improved up to 7 kg-N/m$$^{3}$$/d from 4 kg-N/m$$^{3}$$/d. It could be expected the more compact system by improvement of the membrane set into the biological treatment tanks.

Journal Articles

Investigation of Radioactive Inventory in the TRU Solid Wastes Generated from the Tokai Reprocessing Plant

Sakakibara, Tetsuro; Tsutomu, Tanabe,; Takahashi, Kuniaki; Akutsu, Shigeru; Kojima, Hiroshi; Sakashita, Akira*; Kuroda, Kazuhiko*

Proceedings of International Waste Management Symposium 2005 (WM 2005), 0 Pages, 2005/00

Focusing on the cover layer materials (as the Radon Barrier Materials), which could have the effect to restrain the radon from scattering into the air and the effect of the radiation shielding, we produced the radon barrier materials with crude bentonite on an experimental basis, using the rotary type comprehensive unit for grinding and mixing, through which we carried out the evaluation of the characteristics thereof.

Oral presentation

Evaluation of radioactivity in wastes from Tokai reprocessing plant, 4; Correlation between Tc-99 and Cs-137, 1

Sakakibara, Tetsuro; Kohanawa, Osamu; Akutsu, Shigeru; Kojima, Hiroshi; Sakashita, Akira*; Kuroda, Kazuhiko*; Kino, Kenichiro*; Saigusa, Moriyuki*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of radioactivity in wastes from Tokai reprocessing plant, 5; Correlation between activation products and Co-60, 1

Kino, Kenichiro*; Saigusa, Moriyuki*; Sakashita, Akira*; Kuroda, Kazuhiko*; Sakakibara, Tetsuro; Kohanawa, Osamu; Akutsu, Shigeru; Kojima, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Development of biological treatment of high concentration sodium nitrate waste liquid

Takahashi, Kuniaki; Meguro, Yoshihiro; Kawato, Yoshimi; Ogawa, Naoki*; Kuroda, Kazuhiko*; Shibata, Katsushi*

no journal, , 

An electrolytic reduction, chemical reduction, and biological reduction have been picked up as a method of nitrate liquid waste treatment system exhausted from the reprocessing. As a result of comparing them, it was shown that the biological treatment was the most excellent method in safety and the economy.

Oral presentation

Development of efficient dissolution technology for FBR MOX fuel, 5; Endurance test of the bearing for rotary dram type continuous dissolver

Katsurai, Kiyomichi; Kondo, Yoshikazu; Washiya, Tadahiro; Myochin, Munetaka; Kuroda, Kazuhiko*; Nishikawa, Hideaki*; Takizawa, Takeyuki*; Yamashita, Kazuhiko*

no journal, , 

This report presents a knowledge getting from endurance test of the bearing for rotary dram type continuous dissolver which is under development as one of the Fast Reactor Cycle technology Development Project in JAEA. Non lubricant type bearing is preferable to endure heavy radiation environment but abrasion of the bearing is concerned due to heavy weigh and low swing motion. Small scale of the endurance test of the bearing using 4 types of candidates including all-ceramics and hybrid ceramics roll bearing, carbon slide bearing and air bearing was implemented. This report demonstrates the test results of the screening and a way of the improvement for select one.

Oral presentation

Development of basic cutting technology for the FBR fuel disassembly; Evaluation of applicability of laser cutting technology

Shimada, Takashi*; Kitagaki, Toru; Tasaka, Masayuki*; Washiya, Tadahiro; Tsubota, Shuho*; Kohata, Yukifumi*; Nishikawa, Hideaki*; Kuroda, Kazuhiko*

no journal, , 

no abstracts in English

Oral presentation

Development of mechanical cutting technology for FBR fuel disassembly; Research of stable cutting condition for the mechanical cutting technology

Kuroda, Kazuhiko*; Kitagaki, Toru; Higuchi, Hidetoshi; Tasaka, Masayuki*; Washiya, Tadahiro; Toya, Yuichi*; Nishikawa, Hideaki*; Karatsu, Fumiaki*

no journal, , 

no abstracts in English

Oral presentation

Development of efficient dissolution technology for FBR MOX fuel, 9; Endurance test of the bearing for rotary dram type continuous dissolver

Katsurai, Kiyomichi; Washiya, Tadahiro; Onishi, Hiroyuki*; Kuroda, Kazuhiko*; Nishikawa, Hideaki*; Nakatani, Tatsuya*; Yamashita, Kazuhiko*; Yoshimine, Chihiro*

no journal, , 

This report presents the knowledge acquired by the endurance test of the bearing used for the rotary drum type continuation dissolver under development as part of Fast Breeder Reactor Cycle technology Development Project (FaCT project). The bearing used for a dissolver is used on high radiation environment and the severe conditions of high load low swing motion operation. In order to check the endurance of the bearing in such conditions, the endurance test of the small scale of hybrid roll bearing using the lubricant which imitated carbon slide bearing as a-less lubricous type, and imitated radiation and heat degradation as a lubricous type was carried out, and the applicability to dissolver bearing was evaluated.

Oral presentation

Working Group Session "IRPA Practical Guidance for Engagement with the Public on Radiation and Risk"

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Etani, Reo*; Chikamoto, Kazuhiko*; et al.

no journal, , 

This working group has been translating into Japanese the publication "Practical Guidance for Engagement with the Public on Radiation and Risk" by IRPA in 2020. This publication was made with the theme of public understanding, which was one of key issues that the consultation by IRPA to its member societies identified as most necessary in the radiation protection system. The translated guidance is supposed to be distributed to radiation protection experts and relevant communities in Japan who may be interested in public understanding. The purpose of this symposium is to share the working progress and important points of the guidance.

Oral presentation

Activity report from IRPA Practical Guidance for Engagement with the Public on Radiation and Risk Working Group

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Takahara, Shogo; Etani, Reo*; et al.

no journal, , 

The WG has translated the "Practical Guidance for Engagement with the Public on Radiation and Risk" ("IRPA Guidance") issued by the International Radiation Protection Association ("IRPA") to its member societies in 2020. "Practical Guidance for Engagement with the Public on Radiation and Risk" (hereinafter referred to as "IRPA Guidance") published by the International Radiological Protection Association (hereinafter referred to as "IRPA") in 2020 for its member societies, and to provide the information to radiation protection experts and other interested.

Oral presentation

Planning session from IRPA Practical Guidance for Engagement with the Public on Radiation and Risk Working Group

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Kawaguchi, Isao*; Etani, Reo*; et al.

no journal, , 

The WG has translated the "Practical Guidance for Engagement with the Public on Radiation and Risk" ("IRPA Guidance") issued by the International Radiation Protection Association ("IRPA") to its member societies in 2020. "The content of the IRPA guidance was presented at a symposium organized by the Health Physics Society of Japan in June 2020. The content of the IRPA guidance was presented at the Health Physics Society planning symposium held in June 2020, where many experts attended and provided feedback. In this planning session, we will focus on public engagement and related specific examples and situations related to public engagement.

12 (Records 1-12 displayed on this page)
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