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Tsukada, Kazuaki; Sato, Nozomi; Watanabe, Satoshi; Ishioka, Noriko; Hatsukawa, Yuichi; Hashimoto, Kazuyuki; Kin, Tadahiro*; Kawabata, Masako; Saeki, Hideya; Nagai, Yasuki
no journal, ,
no abstracts in English
-ray analysis with time-of-flight methodToh, Yosuke
no journal, ,
no abstracts in English
Yasuda, Kenichiro; Suzuki, Daisuke; Kanazawa, Kazuhito; Miyamoto, Yutaka; Esaka, Fumitaka; Magara, Masaaki
no journal, ,
In order to detect of undeclared activities in nuclear facilities, we develop to technique of safeguards environmental sample analysis in JAEA. As part of this effort, isotope ratio analysis of individual MOX particle was performed using by TIMS without chemical treatment. It is possible to estimate an age determination of plutonium purification by a combination of the plutonium isotope ratios and (Pu-238+Am-241)/(Pu-239+Pu-240) alpha activity ratios were obtained by the alpha spectrometry. Since the plutonium particle size is more than 1
m due to the influence of self-absorption, exactly measurement of the activity ratios has been difficult. Therefore, we were examining how to acid dissolution in the plutonium particles on the TIMS filament before alpha spectrometry.
-ray analysis at J-PARC/MLF/ANNRIKimura, Atsushi
no journal, ,
no abstracts in English
Miyamoto, Yutaka; Yasuda, Kenichiro; Magara, Masaaki
no journal, ,
The authors accomplished the development of technique for sequential separation of U, Th, Pb, and the lanthanides using a single anion-exchange column and mixed media consisting of hydrochloric acid, nitric acid, acetic acid, and hydrofluoric acid in the previous work. Composition of eluents for separation of Pu and Th was optimized to accomplish the sequential separation of multi-elements including Pu. The mixture of Pu and Th was successfully separated by a single anion exchange column with acetic acid-HCl-HF mixed-media.
Furuta, Sadaaki; Ikeda, Koki; Mikake, Shinichiro; Imaeda, Yasuhiro; Nagasaki, Yasushi; Suzuki, Hajime; Nomura, Yukihiro
no journal, ,
no abstracts in English
Takeuchi, Erina; Atarashi-Andoh, Mariko; Nishimura, Shusaku; Nakanishi, Takahiro; Tsuzuki, Katsunori; Koarashi, Jun; Matsunaga, Takeshi
no journal, ,
no abstracts in English
Be and 
Al by AMSKokubu, Yoko; Matsubara, Akihiro; Fujita, Natsuko; Nishio, Tomohiro*; Owaki, Yoshio*; Sanada, Katsuki*; Nishizawa, Akimitsu*; Miyake, Masayasu*
no journal, ,
Cosmogenic nuclides of Be and Al are used for studies such as estimation of exposure age and erosion rate of rock. In order to measure traces of Be and Al by accelerator mass spectrometry (AMS) in these studies, reagents with low levels of Be and Al are needed. In this study, ratios of Be/
Be or Al/
Al in several reagents were compared. The reagents were oxides for evaluation of blank in measurement and standard solutions for atomic absorption spectrometry (AAS) or inductively coupled plasma optical emission / mass spectrometry (ICP) for carrier and evaluation of process blank. The ratios were measured in JAEA-AMS-TONO. The ratios of Be/Be in the Be oxides and the Be standard solutions were approximately 10
10
levels. The Be Standard solutions for AAS and ICP supplied by Merck had lower ratios of Be/Be than those supplied by Wako and Kanto chemical.
Fujita, Hiroki
no journal, ,
Optically stimulated luminescence (OSL) from natural quartz and feldspar has been used in retrospective dosimetry, dating of sediment and etc. However, in the application target mineral should be extracted with chemical separation which is robust work. Now a days, pulsed optically stimulated luminescence (P-OSL) was developed to separate luminescence signal from between quartz and feldspar as instrumental separation. The purpose of this study tried to apply the P-OSL to Japanese surface soil as retrospective dosimetry with easy physical separation. From our results, it was concluded that P-OSL dosimetry is suitable for accident evaluation although further research is required to improve the protocol using various kinds of Japanese surface soils.
Ishii, Yasuo; Sasaki, Yoshito; Kikuchi, Naoyuki; Watanabe, Takayoshi; Oda, Yoshihiro; Niizato, Tadafumi
no journal, ,
As part of "Long-Term Assessment of Transport of Radioactive Contaminant in the Environment of Fukushima" (F-TRACE project), JAEA have researched to expect the transportation of radioactive caesium from contaminated mountain forests to estuary and coast through dam, pond, river etc. based on survey data in Fukushima prefecture, and to implement technical information and remedial measures to prevent contamination of decontaminated areas and domestic water supply. In the forest area, it is considered that radioactive caesium existed in the tree canopies move to the surface of the ground through litter fall, through fall and stem flow. In this study, we report properties and distribution of radioactive caesium of the surface soils at stem base of Japanese cedar in the Ogi district of Kawauchi-mura to know the influence of the stem flow on soil.
Koma, Yoshikazu
no journal, ,
Due to the accident of Fukushima Daiichi NPS, TEPCO, wide area was contaminated. TEPCO analyzed radioactivity in the soil within the NPS site and reported their concentration in 2011. Based on the data disclosed, transport behavior from the fuel of damaged reactors to the soil for the detected radionuclides was investigated.
Zr in the contaminated water generated at the Fukushima Daiichi Nuclear Power StationShimada, Asako; Kameo, Yutaka
no journal, ,
no abstracts in English
Inoue, Kazumi; Fujita, Hiroki; Hatsukawa, Yuichi
no journal, ,
no abstracts in English
I in field soil around Tokai Reprocessing PlantNagaoka, Mika; Yokoyama, Hiroya; Fujita, Hiroki
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no abstracts in English
Watanabe, Shigeki; Balkin, E. R.*; Hamlin, D. K.*; Gagnon, K.*; Chyan, M.-K.*; Wilbur, D. S.*
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no abstracts in English
Li + 
W reactionTamura, Nobuyuki; Hirose, Kentaro; Nishio, Katsuhisa; Nishinaka, Ichiro; Makii, Hiroyuki; Orlandi, R.; L
guillon, R.; Smallcombe, J.; Andreyev, A. N.; Otsuki, Tsutomu*; et al.
no journal, ,
no abstracts in English
Tamura, Nobuyuki; Nishio, Katsuhisa; Hirose, Kentaro; Nishinaka, Ichiro; Makii, Hiroyuki; Kimura, Atsushi; Ota, Shuya*; Andreyev, A. N.; Vermeulen, M.*; Gillespire, S.*; et al.
no journal, ,
no abstracts in English
Miyashita, Yuka*; Akiyama, Kazuhiko*; Hatsukawa, Yuichi; Tadai, Tomohiro*; Chiba, Kazuki*; Sato, Yuta*; Kubuki, Shiro*
no journal, ,
To obtain an endohedral metallofullerenes with high specific radioactivity using nuclear recoil phenomena, many experiments have been performed so far. However, production yield of metallofullerene by nuclear recoil using high LET radiation was found to be very small because radiation damages to targeted fullerene molecule were not negligible. In order to increase the yield of radioactive metallofullerenes, it is very promising to employ the recoil of nuclear reaction by fast neutron from the viewpoint of reducing the radiation damage. In this session, we will report the synthesis of 
Sr@C
using nuclear recoil of 
Sr (n,2n) Sr reaction by 14 MeV fast neutron. Mixture of C with strontium salts such as Sr(NO
)
and SrCO
were employed for the target materials. These samples were irradiated by fast neutron in Fusion Neutronics Source at Japan Atomic Energy Agency. After the irradiation, CS, aniline, and HCl
were passed through the irradiated samples on the filter to dissolve C, Sr@C, and strontium salts, respectively. The -ray from these solutions were measured by Ge detector. As a result, about 0.75% of radioactivity was observed in the aniline solution from SrCO sample. This result strongly suggests that Sr@C was efficiently produced by fast neutron irradiation of SrCO/C target.
Dohi, Terumi; Omura, Yoshihito*; Fujiwara, Kenso; Iijima, Kazuki
no journal, ,
Lichens are symbiotic organisms consisted of fungi and algae. A number of studies were carried out after the nuclear weapons tests and Chernobyl accident, and demonstrated that lichens were useful for indicator of radioactive fallout because they could take up large amount of radionuclides directly from their thallus due to lack of root system and retain them. However, in order to measure radiocaesium concentration in lichen, the lichen sample was collected from their habitat. Therefore, temporal change of radiocaesium concentration in same lichen individual has never reported. In addition, a retention of radiocaesium in lichens in Japan was unknown. The objective of this study is to investigate the temporal change of radiocaesium concentration in individual lichen. Lichen samples were parmelioid lichens which were grown on the trunk of Prunus spp. within Fukushima prefecture. The counting rate of surface of lichen was measured by using Geiger-Mueller (GM) survey meter with a lead collimator to evaluate the radiocaesium concentration. The contamination density in lichens increased from the initial measurement value after one year. It is considered that lichen may receive radiocaesium from stem flow including radiocaesium desorbed from canopy or stem.
Toyoshima, Atsushi; Miyashita, Sunao*; Oe, Kazuhiro*; Kitayama, Yuta*; Lerum, H. V.*; Goto, Naoya*; Kaneya, Yusuke; Komori, Yukiko*; Mitsukai, Akina*; Vascon, A.; et al.
no journal, ,
no abstracts in English