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Sugo, Yumi; Taguchi, Mitsumasa; Nagaishi, Ryuji; Sasaki, Yuji; Hirota, Koichi; Morita, Yasuji
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 26, 2009/12
The radiolytic stabilities of the organic extractants for the separation of actinides have been commonly evaluated by the irradiation with 
-rays as the most convenient method. However in the actual partitioning process of HLW, the extractants will be exposed to alpha-particles emitted from actinides, as well as beta- and -rays from various fission products. In this study, alpha-radiolysis of 
-tetraoctyldiglycolamide (TODGA) in 
-dodecane was investigated by the irradiation with helium ion beam accelerated by a tandem accelerator using the TC1 irradiation apparatus in the TIARA facility. The sample was also irradiated with 
Co -rays for comparison of the radiation chemical yields between 
- and -rays. It was found that TODGA had almost fourfold resistance to -rays, as compared with -rays. This result suggests that the radiolytic degradation of TODGA has been hitherto overestimated only by the irradiation with -rays.
Yamada, Keisuke; Uno, Sadanori; Chiba, Atsuya; Yokoyama, Akihito; Saito, Yuichi; Ishii, Yasuyuki; Sato, Takahiro; Okubo, Takeru; Agematsu, Takashi
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 168, 2009/12
no abstracts in English
Sr solvent impregnated resin against irradiationHoshi, Harutaka; Kikuchi, Takahiro; Morita, Yasuji; Kimura, Takaumi
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 24, 2009/12
Minimization of radioactive waste from reprocessing process of spent nuclear fuel is strongly desired. We develop an advanced technology for separation of heat generating elements (Cs and Sr) from high level waste to optimize radioactive waste by its characteristics. Some novel solvent impregnated resins (SIRs) were prepared and these SIRs indicated promising ability to separate Cs and Sr from other typical fission products dissolved in nitric acid solution. These adsorbents contacting with nitric acid solution were exposed to ray in a vial. After the irradiation, adsorbents were filtrated through a membrane filter. The adsorption capacity was examined by using irradiated adsorbents after drying. It is concluded that both SIRs maintained their high selectivity for Cs and Sr, respectively, after irradiation. Decreasing ratio of adsorption capacity by irradiation can be estimated from these results. It contributes significantly for conceptual design of separation plant.
-ray irradiationNogami, Masanobu*; Sugiyama, Yuichi*; Kawasaki, Takeshi*; Harada, Masayuki*; Kawata, Yoshihisa; Morita, Yasuji; Kikuchi, Toshiaki*; Ikeda, Yasuhisa*
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 25, 2009/12
As a part of the development of a novel reprocessing system for spent FBR fuels based on the precipitation method, influence of concentrations of HNO
on the stability by -ray irradiation was examined for 
-
-butyl-2-pyrrolidone (NBP), a candidate precipitant for the first precipitation step for selectively precipitating U(VI). The residual ratios of the samples for HNO solutions up to 3 M were found to be decreased identically, where ca. 20% of NBP was degraded after the irradiation of 1 MGy. It was found that the degradation of the samples of 6 M HNO is more distinguished, where ca. 30% was degraded after the irradiation of 0.1 MGy. As the result of the investigation of the degradation mechanism of NBP, it was revealed that the degradation started from the cleavage of the pyrrolidone ring of NBP by the addition of oxygen atom, followed by the formation of chain monoamides and C4 compounds by the continuous addition of oxygen, leading to the generation of oxalic acid.
Watanabe, Satoshi; Hashimoto, Kazuyuki; Watanabe, Shigeki; Iida, Yasuhiko*; Hanaoka, Hirofumi*; Endo, Keigo*; Ishioka, Noriko
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 109, 2009/12
no abstracts in English
CdIto, Sayuri; Suzui, Nobuo; Kawachi, Naoki; Ishioka, Noriko; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 104, 2009/12
CO
and positron emission tomographyKawachi, Naoki; Kikuchi, Kaori*; Watabe, Hiroshi*; Suzui, Nobuo; Ishii, Satomi; Ishioka, Noriko; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 101, 2009/12
Suzui, Nobuo; Nakamura, Shinichi*; Ito, Sayuri; Kawachi, Naoki; Ishioka, Noriko; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 102, 2009/12
Cd translocation in Tobacco plantsNakamura, Shinichi*; Suzui, Nobuo; Ishioka, Noriko; Kawachi, Naoki; Ito, Sayuri; Hattori, Hiroyuki*; Chino, Mitsuo*; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 103, 2009/12
Agematsu, Takashi; Uno, Sadanori; Chiba, Atsuya; Yamada, Keisuke; Yokoyama, Akihito; Saito, Yuichi; Ishii, Yasuyuki; Sato, Takahiro; Okubo, Takeru; Yokota, Wataru; et al.
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 175, 2009/12
Three electrostatic accelerators of TIARA were operated smoothly in FY 2008, and all the planned experiments were carried out except those canceled by users. The yearly operation time of the tandem accelerator, the single-ended accelerator and the ion implanter amounted to 2009, 2426 and 1882 hours, respectively. Regarding the tandem accelerator, the control system was renewed, and the unstable acceleration voltage caused by mechanical vibration reduced by adjusting the driving mechanism of the pellet chains. The SF
gas for the single-ended accelerator was purified, and its storage tank was repainted. As to the ion implanter, Bi ion, which was requested by users, was successfully generated and accelerated with intensity of 0.5
A.
Iida, Yasuhiko*; Hanaoka, Hirofumi*; Watanabe, Satoshi; Watanabe, Shigeki; Ishioka, Noriko; Yoshioka, Hiroki*; Yamamoto, Shinji*; Paudyal, P.*; Paudyal, B.*; Higuchi, Tetsuya*; et al.
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 108, 2009/12
Yokota, Wataru; Sato, Takahiro; Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Kamiya, Tomihiro
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 165, 2009/12
The fast single-ion hit system is being developed using the focusing microbeam system at the TIARA cyclotron of the Takasaki Advanced Radiation Research Institute, JAEA. The highest hit rate of 25/s, 2.5 times as high as the goal value, was achieved using a microbeam of 260 MeV-Ne beam last fiscal year. However, a couple of subjects to be solved for practical single-ion irradiation were found. One was multiple hits at the same targeted point, which appeared at several percent of the total hit number. The percentage has been lowered to less than 1% by improving the time response of the detection system of the single-ion hit. The other is a miss hit around a targeted point, which appears at more than ten percents of the total hit number. The measured phenomena relating to the miss hit suggest that it may concern scattering of ions by the micro slit of the focusing system.
N-labeled nitrogen gas tracer and the imaging of nitrogen fixation in soybean nodulesIshii, Satomi; Suzui, Nobuo; Ito, Sayuri; Ishioka, Noriko; Kawachi, Naoki; Matsuhashi, Shimpei; Otake, Norikuni*; Oyama, Takuji*; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 106, 2009/12
Kikuchi, Kaori*; Kawachi, Naoki; Ishii, Satomi; Suzui, Nobuo; Ito, Sayuri; Ishioka, Noriko; Honda, Ichiro*; Fujimaki, Shu
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 105, 2009/12
Br-m-bromobenzylguanidine (Br-MBBG) for in vivo imaging of neuroendcrine-tumor with PETWatanabe, Shigeki; Hanaoka, Hirofumi*; Liang, J. X.; Iida, Yasuhiko*; Watanabe, Satoshi; Endo, Keigo*; Ishioka, Noriko
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 107, 2009/12
1 surface studied by reflection high-energy positron diffractionFukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 145, 2009/12
no abstracts in English
-ray irradiation facilitisHaruyama, Yasuyuki; Kaneko, Hirohisa; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; Takagi, Masahide*; Hirai, Toshiyuki*; et al.
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 176, 2009/12
no abstracts in English
-ray irradiation facilitiesKaneko, Hirohisa; Haruyama, Yasuyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; Takagi, Masahide*; Hirai, Toshiyuki*; et al.
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 177, 2009/12
no abstracts in English
Nakasone, Akari; Kawai, Maki*; Kiyosue, Tomohiro*; Narumi, Issei; Uchimiya, Hirofumi*; Ono, Yutaka
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 65, 2009/12
Hase, Yoshihiro; Okamura, Masachika*; Takeshita, Daigaku*; Narumi, Issei; Tanaka, Atsushi
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 66, 2009/12
