JOPSS - Search Results

Journal Articles

Ferroaxial transitions in glaserite-type compounds; Database screening, phonon calculations, and experimental verification

Yamagishi, Shigetada*; Hayashida, Takeshi*; Misawa, Ryusuke*; Kimura, Kenta*; Hagihara, Masato; Murata, Tomoki*; Hirose, Sakyo*; Kimura, Tsuyoshi*

Chemistry of Materials, 35(2), p.747 - 754, 2023/01

https://doi.org/10.1021/acs.chemmater.2c03540

Times Cited Count：9 Percentile：67.40(Chemistry, Physical)

Journal Articles

Morphological reproductive characteristics of testes and fertilization capacity of cryopreserved sperm after the Fukushima accident in raccoon ()

Komatsu, Kazuki*; Iwasaki, Tsugumi*; Murata, Kosuke*; Yamashiro, Hideaki*; Goh, V. S. T.*; Nakayama, Ryo*; Fujishima, Yohei*; Ono, Takumi*; Kino, Yasushi*; Shimizu, Yoshinaka*; et al.

Reproduction in Domestic Animals, 56(3), p.484 - 497, 2021/03

https://doi.org/10.1111/rda.13887

Times Cited Count：13 Percentile：83.05(Agriculture, Dairy & Animal Science)

We have established an archive system of livestock and wild animals from the surrounding ex-evacuation zone. Wildlife within the alert zone have been exposed to low-dose-rate (LDR) radiation for a long and continuous time. In this study, we analysed the morphological characteristics of the testes and in vitro fertilization (IVF) capacity of cryopreserved sperm of raccoons from the ex-evacuation zone of the FDNPP accident. This study revealed that the chronic and LDR radiation exposure associated with the FDNPP accident had no adverse effect on the reproductive characteristics and functions of male raccoons.

Journal Articles

Current status of decommissioning activities in JAEA; Second midterm plan from FY2010 to FY2014

Tachibana, Mitsuo; Murata, Masato; Tasaki, Tadayuki; Usui, Hideo; Kubota, Shintaro

Proceedings of 21st International Conference & Exhibition; Nuclear Fuel Cycle for a Low-Carbon Future (GLOBAL 2015) (USB Flash Drive), p.1987 - 1996, 2015/09

230 various types of nuclear facilities were constructed in JAEA's R&D Institutes or Center until the establishment of the JAEA in 2005. The JAEA has efficiently and systematically decommissioned nuclear facilities that would no longer be required after the establishment of the JAEA. Decommissioning of nuclear facilities in each JAEA's R&D Institutes or Center was continued based on the second midterm plan of the JAEA from FY2010 to FY2014. Decommissioning of 2 nuclear facilities was completed during the second midterm. This report describes current status of decommissioning activities in the JAEA during the second midterm and outline of the decommissioning plan in the third midterm.

Journal Articles

Study of an aqueous process using hydrochloric acid for radioactive waste containing uranium

Ohashi, Yusuke; Tsunashima, Yasumichi; Murata, Masato

Proceedings of 2nd International Conference on Sustainable Development through Nuclear Research and Education (Nuclear 2009) (CD-ROM), p.161 - 168, 2009/05

Solid and liquid radioactive waste derived from various research such as technology development for uranium refining and conversion stored currently totals 1500tons. NaF waste, used as an absorbent of UF $_{6}$ contains about 20-30wt% uranium. CaF $_{2}$ waste, which is generated from the disposal of waste water including fluoride, contains up to 20wt% uranium. Most of these are classified as intermediate disposal waste. Hence it is necessary to recover uranium to dispose waste as a shallow ground disposal waste. Dissolution experiments were carried out by charging CaF $_{2}$ waste and NaF waste into 1N HCl. The dissolution rates of CaF $_{2}$ waste and NaF waste were 99.8% and 100% respectively. The recovery rates of uranium from CaF $_{2}$ solution and NaF solution were 98.2% and 99.7% respectively. It was confirmed that we could dispose these waste reasonably.

JAEA Reports

Extraction and separation of uranium from simulated uranium-containing liquid wastes of Ningyo-toge environmental engineering center

Mitamura, Hisayoshi; Naganawa, Hirochika; Nagano, Tetsushi; Yanase, Nobuyuki; Hanzawa, Yukiko; Shimojo, Kojiro; Matsubara, Tatsuo; Mita, Yutaka; Taki, Tomihiro; Murata, Masato

JAEA-Research 2008-113, 27 Pages, 2009/03

JAEA-Research-2008-113.pdf:31.84MB

An effective mass processing equipment using solvent extraction method, named "emulsion flow extractor," is the most promising apparatus for removal and recovery of uranium from liquid waste originated from decontamination of uranium-contaminated fluoride waste in the uranium conversion test facility and of used gas centrifuges in the uranium enrichment facility at Ningyo-toge environmental engineering center. Prior to application of the emulsion flow extractor for actual uranium-containing liquid waste, properties of some phosphorous extractants for extraction and separation of uranium and constituents from simulated liquid wastes were examined through batch tests. These preliminary tests revealed that D2EHPA would be a promising candidate for extractant used for treatment of the actual uranium-containing liquid wastes, and that the extractants with a surfactant like AOT would not be useful.

JAEA Reports

None

Takamiya, Kazuhiro; Murata, Masato

JNC TY6440 2004-002, 47 Pages, 2005/03

JNC-TY6440-2004-002.pdf:0.7MB

None

JAEA Reports

None

Takamiya, Kazuhiro; Murata, Masato

JNC TY6440 2004-001, 37 Pages, 2005/03

JNC-TY6440-2004-001.pdf:0.62MB

None

JAEA Reports

Examination of Area Precipitaion in the Hiyoshi-gawa and Garaishi-gawa catchments

Murata, Masatoshi*; Miyahara, Tomoya*; Odagawa, Shinya*

JNC TJ7400 2005-048, 111 Pages, 2004/03

JNC-TJ7400-2005-048.PDF:12.01MB

In this study, some area precipitaions that were calculated Representation value method, Average rainfall method and Weighted average method was compared with runoff of these catchments. Calculation area method precipitaion was estimated by the correlation coefficient.

JAEA Reports

Additional Selection of Everpotranspiration and Precipitation Measurement Points considered characteristic of catchiment, in Surface Hydrological Investigation.

Miyahara, Tomoya*; Odagawa, Shinya*; Murata, Masatoshi*

JNC TJ5400 2004-001, 93 Pages, 2004/01

JNC-TJ5400-2004-001.pdf:12.38MB

The Horonobe Underground Research Center carried out surface hydrological investigation as a part of Horonobe Underground Research Laboratory project. This report describes the examination, was additional selection of everpotranspiration and precipitation measurement points in surface hydrological investigation. In this study, characteristic analysis of catchment carried out Shimizu River catchment and divided into three catchments of Penke-Ebekorobetu River catchment. Consequently, in surrounding catchment of the Horonobe Underground Research Laboratory site, it became clear that topography is low relief and highest forest type is broadleaf tree stands. The result which examined the applicability of the Everpotranspiration calculation method, applicability of profile method and Bowen's ratio thermal balance method in broadleaf tree forest, and applicability of Penman method in pastureland were high. Moreover, three additional everpotranspiration measurement sites and three additional precipitation measurement sites is selected using these results, in surrounding catchment of the Horonobe Underground Research Laboratory site.

JAEA Reports