Development of the desalting method for gross alpha activity determination (Contract research)

Koike, Yuko; Yamada, Ryohei; Nagaoka, Mika; Nakano, Masanao; Ono, Yosuke; Suitsu, Yuichi

JAEA-Technology 2021-011, 39 Pages, 2021/08

JAEA-Technology-2021-011.pdf:1.56MB

In the Analyzed Liquid Treatment Facility of Japan Nuclear Fuel Co., Ltd. (JNFL) MOX Fuel Fabrication Plant (J-MOX), the interfere by salts with the analysis of gross alpha activity concentration analysis will be caused during the treatment process. Therefore, JNFL devised the desalting method using a solid-phase extraction chromatography. Japan Atomic Energy Agency carried out the experimental study to confirm the validity of this desalting method for the treatment liquid based on the contract with JNFL. This study consists of three experiments as follows: Step 1 - Selection of an optical solid-phase extraction agent, Step 2 - Evaluation of variation optical solid-phase extraction agent, and Step 3 - Application of the imitation liquid waste. The result of Step 1 determined the solid-phase extraction agent (InertSep ME-2) and the optimum condition (aspiration method by manifold (about 5-10 mL/min), 3M nitric acid as eluent, pH: 5, and no adjustment of ionic valence). Then, the result of Step 2 and 3 made sure the validation of this method by obtaining over 70% recovery for the imitation liquid waste sample of the Analyzed Liquid Treatment Facility of J-MOX.

Detecting distribution pattern of latent hydrothermally altered zones by geobotanic remote sensing

Koike, Katsuaki*; Uchiyama, Kyosuke*; Koide, Kaoru

Joho Chishitsu, 23(2), p.68 - 69, 2012/06

Hydrothermally-altered zones frequently collapse in intense rain and are intimately related to genesis of heavy metal mineralization. Therefore it is very important to investigate their distributions from the viewpoints of disaster prevention and mineral resource exploration. This study developed a new vegetation index (VIGS) for detecting abnormalities of vegetation induced by differences in soil chemistry and soil moisture related to hydrothermally-altered zones. The VIGS includes the green and mid-infrared bands, which are highly sensitive to vegetation water stress. To validate its availability, this VI was applied in a landslide prone area (Hachimantai) and a gold deposit area (Hishikari Mine) using Landsat TM data. As a result, it was found that the VIGS is very useful to detect abnormalities of vegetation related with hydrothermally-altered zones because abnormalities of vegetation coincide with landslides and hydrothermally-altered zones associated with gold mineralization.

Induction of mutations affecting pollen formation by ion beam irradiation to hort (cv. White Aga)

Kondo, Masayoshi*; Koike, Yosuke*; Okuhara, Hiroyuki*; Oda, Masayuki*; Hase, Yoshihiro; Yoshihara, Ryohei; Kobayashi, Hitoshi*

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 67, 2008/11

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2008-055.pdf

no abstracts in English

Study on expanding mutation of flower organ of lily

Kondo, Masayoshi*; Koike, Yosuke*; Kobayashi, Hitoshi*; Hase, Yoshihiro; Yokota, Yuichiro

no journal, , 

no abstracts in English

Induction of male sterility in lily by ion-beam irradiation

Kondo, Masayoshi*; Koike, Yosuke*; Okudera, Yosuke*; Miyajima, Toshinari*; Nomizu, Toshikazu*; Hase, Yoshihiro; Yokota, Yuichiro; Kobayashi, Hitoshi*

no journal, , 

no abstracts in English