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JAEA Reports

Survey report of regulation trend relate to uranium bearing waste in an international organization and foreign countries

Ouchi, Masaru; Takebe, Shinichi; Kawatsuma, Shinji; Fukushima, Tadashi*

JAEA-Review 2012-019, 186 Pages, 2013/02

JAEA-Review-2012-019.pdf:11.86MB

We have reviewed information about justification for establishing uranium bearing waste acceptance for near surface disposal (trench and concrete pit disposals) in foreign countries, to intend to discuss clearance level and disposal of uranium bearing waste in Japan. Most of EU countries have adopted the unconditional clearance level 1 Bq/g described in EU Guidance RP 122 Part 1 and IAEA Safety Guide RS-G-1.7 for uranium wastes. And in the case of special landfill burial, the conditional clearance level about 10 Bq/g (equivalent to exemption level) has been adopted in Germany, Sweden and UK.

JAEA Reports

Manual for collecting management data concerning decommissioning of nuclear facilities

Tachibana, Mitsuo; Fukushima, Tadashi*; Ishigami, Tsutomu

JAEA-Testing 2010-001, 43 Pages, 2010/07

JAEA-Testing-2010-001.pdf:1.49MB

The DENESYS has been developed to support examination of decommissioning plan aiming to use management data and experiences obtained through decommissioning of nuclear facilities effectively. In the development of the DENESYS, it is important efficiently to collect, and to analyze management data obtained from actual decommissioning of nuclear facilities. Then, collecting items of management data needed to examine decommissioning plan were extracted. And en efficient collecting method of the extracted collecting items was examined based on the JPDR decommissioning project. As a result, collecting items are work management data, waste management data. These data would be collected by suing daily work management report, waste record, and secondary record data in each JAEA site. In this report outline of collecting items and collecting method for decommissioning of nuclear facilities were described. And manual for collecting management data was introduced.

Journal Articles

Integrated experiments of electrometallurgical pyroprocessing with using plutonium oxide

Koyama, Tadafumi*; Hijikata, Takatoshi*; Usami, Tsuyoshi*; Inoue, Tadashi*; Kitawaki, Shinichi; Shinozaki, Tadahiro; Fukushima, Mineo; Myochin, Munetaka

Journal of Nuclear Science and Technology, 44(3), p.382 - 392, 2007/03

 Times Cited Count:22 Percentile:81.84(Nuclear Science & Technology)

Electrometallurgical pyroprocessing is a promising technology to realize actinide fuel cycle. Integrated experiments to demonstrate electrometallurgical pyroprocessing of plutonium oxide in continuous operation were carried out. In each test, 10 to 20 g of PuO$$_{2}$$ was reacted with Li reductant to form metal product. The reduction products were charged in the anode basket of the electrorefiner with LiCl-KCl-UCl$$_{3}$$ electrolyte. With using the anodes, deposition of uranium on the solid cathode was carried out, when PuCl$$_{3}$$ concentration was low. After Pu/U ratio in salt electrolyte was increased enough, plutonium and uranium were recovered simultaneously on the liquid cadmium cathode. By heating up the deposits for distillation of the salt and the cadmium, U metal or Pu-U alloyed metal were obtained as residues in the crucible. It was first result to demonstrate the recovery of metal actinides in the continuous operation of pyroprocessing of oxide fuels.

Journal Articles

Comprehensive cost estimation method for decommissioning

Kudo, Kenji; Kawatsuma, Shinji; Rindo, Hiroshi; Watabe, Kozo; Tomii, Hiroyuki; Shiraishi, Kunio; Yagi, Naoto; Fukushima, Tadashi; Zaitsu, Tomohisa

Proceedings of 14th International Conference on Nuclear Engineering (ICONE-14) (CD-ROM), 8 Pages, 2006/07

Japan Atomic Energy Research Institute (JAERI) played a leading role in basic research in the field of atomic energy research and development, while Japan Nuclear Cycle Development Institute (JNC) did a major role in FBR cycle development and high level waste disposal. Following the Government's decision in December 2001, JAERI and JNC was merged as of October 1st, 2005. The new organization, Japan Atomic Energy Agency (JAEA), is an institute for comprehensive R&D for atomic energy, and is the largest research and development institute among Governmental R&D organizations. Its missions are basic research on atomic energy, R&D for nuclear fuel cycle, decommissioning of own facilities and disposal of waste, contribution to safety and non-proliferation, etc. The JAEA owns a number of nuclear facilities: research reactors such as JRR-2 and Joyo, prototype reactors such as ATR "Fugen" and FBR "Monju", fuel cycle plants such as Uranium Enrichment Demonstration Plant at Ningyo-Toge, MOX fuel plants at Tokai, Reprocessing Plant at Tokai, and Hot Laboratories such as JRTF and FMF. As a part of preparation of the mergence, JNC and JAERI have jointly developed a comprehensive cost estimation method for decommissioning, based on decommissioning and refurbishing experiences of JAERI and JNC. This method involves more estimation parameters from typical decommissioning activities than before, so as to make it more reliable. JAERI and JNC have estimated the total cost for decommissioning by using this method, and concluded that the cost would be 600 billion yen (approx. 5 billion USD).

Oral presentation

Study of safety analysis for decommissioning in nuclear cycle facility, 1

Kawatsuma, Shinji; Yagi, Naoto; Fukushima, Tadashi; Annen, Sotonori*; Sato, Hiroshi*; Murakami, Tsunekazu*; Hosaka, Katsumi*

no journal, , 

no abstracts in English

Oral presentation

Study of safety analysis for decommissioning in nuclear cycle facility, 2

Kawatsuma, Shinji; Yagi, Naoto; Fukushima, Tadashi; Annen, Sotonori*; Sato, Hiroshi*; Murakami, Tsunekazu*; Hosaka, Katsumi*

no journal, , 

no abstracts in English

Oral presentation

None

Kawatsuma, Shinji; Funabashi, Hideyuki; Yagi, Naoto; Kudo, Kenji; Tsujimura, Seiichi; Fukushima, Tadashi

no journal, , 

no abstracts in English

Oral presentation

Development of clearance level verification evaluation system, 1; Fabrication of function for evaluating radionuclide concentration

Tachibana, Mitsuo; Shiraishi, Kunio; Fukushima, Tadashi; Naito, Akira; Ishigami, Tsutomu

no journal, , 

no abstracts in English

Oral presentation

Proposal of uranium bearing waste disposal

Kawatsuma, Shinji; Takebe, Shinichi; Ouchi, Masaru; Kozawa, Kazushige; Yagi, Naoto; Sato, Kazuhiko; Morimoto, Yasuyuki; Fukushima, Tadashi; Ishibashi, Makoto*

no journal, , 

no abstracts in English

9 (Records 1-9 displayed on this page)
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