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Saito, Hiroshi
JAEA-Review 2016-009, 80 Pages, 2016/07
JAEA-Review-2016-009.pdf:8.28MB
Environmental remediation has been conducted in closed Ningyo-toge Uranium Mine, after decades of mine-related activities. During the remediation, whole procedure, priority, necessary investigations and specific methods have been examined, and issues are clarified which should be solved in the future. For that, it has been recommended that opinions are exchanged among specialists in related fields overseas, and information and their experience are referred. As part of the activities, Ningyo-toge Environmental Engineering Center has been involved continuously in IAEA ENVIRONET, multinational network for environmental remediation. Also, bonds are tightened among participants and IAEA by exchanging opinions and sharing the issues. In parallel, literature survey has been conducted to supplement the information obtained through ENVIRONET and to clarify additionally-required information and targeted sites. The expected information are obtained from the site-visits and now being organized.
Saito, Hiroshi; Sato, Yasushi*; Sakamoto, Atsushi*; Torikai, Kazuyoshi; Fukushima, Shigeru; Sakao, Ryota; Taki, Tomihiro
JAEA-Technology 2015-063, 119 Pages, 2016/03
JAEA-Technology-2015-063.pdf:86.2MB
Ningyo-toge Environmental Engineering Center has been conducting environmental remediation of the Ningyo-toge Uranium Mine, after decades of mine-related activities were terminated. Its purposes are to take measures to ensure safety and radiation protection from the exposure pathways to humans in future, and to prevent the occurrence of mining pollution. As part of the remediation, upstream part of the Yotsugi Mill Tailings Pond, the highest prioritized facility, has been remediated to fiscal year 2012. Multi-layered capping has been constructed using natural material, after specifications and whole procedure being examined in terms of long-term stability, radiation protection, economics, etc. Monitoring has been carried out to confirm the effectiveness of the capping, in terms of settlement, dose and radon exhalation rates, etc. Monitoring of drainage volume of penetrated rainwater is planned. Accumulated data will be examined and used for remediation of downstream part of the Pond.
Sasao, Eiji
ESI-News, 32(4), p.155 - 162, 2014/08
This report compiled the information on distribution and mode of occurrence of uranium deposit was compiled from the published data. Distribution of uranium deposit suggests that geological environments suitable for geological isolation are widely distributed in the Japanese Islands, despite their location in a geologically active area. The mode of occurrence of the uranium deposits indicates that formation of uranium-bearing mineral as well as sorption is expected in both sedimentary and crystalline rocks. The functioning of the natural barrier would be expected in various geological environments in the Japanese Islands, because mineralization and sorption are regarded as a barrier function to retard the migration of radionuclides in HLW, and because of the uranium deposits in the various rock types.
Narumi, Issei
Science & Technology Journal, 12(5), p.50 - 51, 2003/05
no abstracts in English
*
JNC TN1400 2001-011, 129 Pages, 2001/07
JNC-TN1400-2001-011.pdf:7.51MB
no abstracts in English
Sasao, Eiji; Okubo, Seisuke*
JNC TN7450 2000-019, 42 Pages, 2000/11
JNC-TN7450-2000-019.pdf:1.16MB
no abstracts in English
*
JNC TN1400 2000-006, 68 Pages, 2000/07
JNC-TN1400-2000-006.pdf:2.18MB
no abstracts in English
*
JNC TJ7420 2000-001, 14 Pages, 2000/02
JNC-TJ7420-2000-001.pdf:0.27MB
no abstracts in English
Isobe, Hiroshi
Genshiryoku Bakkuendo Kenkyu, 5(1), p.67 - 72, 1998/08
no abstracts in English
*
Environment & Innovation in Mining and Mineral Technology, 1, p.181 - 191, 1998/00
no abstracts in English
Isobe, Hiroshi; Hidaka, Hiroshi*; Onuki, Toshihiko
Mat. Res. Soc. Symp. Proc., 506, p.687 - 694, 1998/00
no abstracts in English
*; Murakami, Takashi*; Kogure, Toshihiro*; Isobe, Hiroshi; Sato, Tsutomu
Mat. Res. Soc. Symp. Proc., 506, p.839 - 846, 1998/00
no abstracts in English
Yanase, Nobuyuki; Sato, Tsutomu; ; Sekine, Keiichi
Radiochimica Acta, 82, p.319 - 325, 1998/00
no abstracts in English
Sato, Tsutomu; Yanase, Nobuyuki; I.S.Williams*; W.Compston*; M.Zaw*; T.E.Payne*; P.L.Airey*
Radiochimica Acta, 82, p.335 - 340, 1998/00
no abstracts in English
Iida, Yoshimasa
Donen Giho, (104), p.135 - 140, 1997/12
Uranium ore in the Athabasca region, Canada, is highly variable in density. This is due to large variations in the grade of high-density uranium and associated metalliferous minerals, and also to changes in porosity. As it is not practical to take accurate measurements of dry bulk density values of a large number of samples. As a result of investigation on actual ore samples, it has been found practical to estimate the dry bulk density of ore from measured wet bulk density and grain density calculated from chemical data.
Kobayashi, Takao
PNC TN1510 97-001, 56 Pages, 1997/05
no abstracts in English
