Automatic sequential separation with an anion-exchange column for ultra-trace analysis of Pu, U, Th, Pb, and lanthanides in environmental samples

Miyamoto, Yutaka; Yasuda, Kenichiro; Magara, Masaaki

Journal of Radioanalytical and Nuclear Chemistry, 309(1), p.303 - 308, 2016/07

https://doi.org/10.1007/s10967-016-4837-y

The technique of sequential separation for U, Th, Pb, lanthanides and Pu using a single anion-exchange column and mixed acids media were developed. An automatic system utilizing a small column and pressurized gas was assembled for this sequential separation. By adjusting the eluent chemical composition for Pu separation, this separation technique has been achieved. Some pieces of tree ring sample were digested, and ultra-trace U and Pu in the samples were separated by this system. The analytical results of U and Pu measured by mass spectrometry will be mentioned.

Accurate purification age determination of individual uranium-plutonium mixed particles

Miyamoto, Yutaka; Suzuki, Daisuke; Esaka, Fumitaka; Magara, Masaaki

Analytical and Bioanalytical Chemistry, 407(23), p.7165 - 7173, 2015/09

https://doi.org/10.1007/s00216-015-8880-2

Age of individual uranium-plutonium mixed particles with various U/Pu atomic ratios were determined by inductively-coupled plasma mass spectrometry. Micron-sized particles were prepared from U and Pu certified reference materials. The Pu reference was stored for 4-6 years since the last purification. The Pu purification age was obtained from the Am/Pu ratio which was calculated from the product of three measured ratios of Pu and Am isotopes in the eluted fractions. Am, U and Pu in a sample solution were sequentially separated a small anion-exchange column. The Am/Pu ratio was accurately determined by spiking pure Am to the sample solution. The determined age of particles with various U/Pu ratios was in good agreement with the expected age with high accuracy and high precision.

Development of analytical techniques for safeguards environmental samples

Magara, Masaaki; Usuda, Shigekazu; Sakurai, Satoshi; Watanabe, Kazuo; Esaka, Fumitaka; Hirayama, Fumio; Lee, C. G.; Yasuda, Kenichiro; Kono, Nobuaki; Inagawa, Jun; et al.

Dai-26-Kai Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Nenji Taikai Rombunshu, p.157 - 164, 2005/00

JAERI has conducted the analysis of domestic and the IAEA samples. JAERI is developing the analytical techniques to improve the analytical ability for the safeguards environmental samples. For bulk analysis, study is focused on the improvement of reliability of isotope ratio measurements by ICP-MS. New chemical separation techniques are under development and a desolvation module is introduced to reduce the polyatomic interferences. In particle analysis, the sample preparation procedure for SIMS method is modified to measure the U/U and U/U ratios for individual particles. We are also developing fission track-TIMS method to measure uranium isotope ratios in particles of sub-micrometer size. A screening instrument of X-ray fluorescent analysis is equipped to measure elemental distribution on a swipe surface.

Safeguards environmental sample analysis at JAERI adaoted to IAEA network analytical laboratories

Usuda, Shigekazu

Kaku Busshitsu Kanri Senta Nyusu, 32(7), p.10 - 11, 2003/07

no abstracts in English

Low-energy - and X-ray measurements by means of Compton suppression technique for safeguards environmental samples

Yasuda, Kenichiro; Mori, Masahito*; Miyamoto, Yutaka; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu

Journal of Nuclear Science and Technology, 39(Suppl.3), p.576 - 578, 2002/11

http://www.tandfonline.com/doi/abs/10.1080/00223131.2002.10875534

no abstracts in English

Total angular momenta of even-parity autoionizing levels and odd-parity high-lying levels of atomic uranium

Miyabe, Masabumi; Geppert, C.*; Oba, Masaki; Wakaida, Ikuo; Wendt, K.*

Journal of Physics B; Atomic, Molecular and Optical Physics, 35(18), p.3865 - 3877, 2002/09

https://doi.org/10.1088/0953-4075/35/18/306

no abstracts in English

Development of trace analytical technology for nuclear materials in the clean laboratory for environmental analysis and research

Usuda, Shigekazu; Watanabe, Kazuo; Sakurai, Satoshi; Magara, Masaaki; Hanzawa, Yukiko; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Saito, Yoko; Gunji, Katsubumi*; et al.

KEK Proceedings 2001-14, p.88 - 92, 2001/06

no abstracts in English

Research on development of high-purity iron-based alloys; Manufacture, analysis of small amount of element and property tests

; *; ; ; Aoto, Kazumi;

JNC TN9400 2000-059, 43 Pages, 2000/05

JNC-TN9400-2000-059.pdf:2.08MB

The purpose of this study is to understand the material properties of manufacturable high-purity iron and high-purity iron-based alloy in present technology and to get an applicable prospect for the structural and functional material of the frontier fast reactor. Then the about 10kg high-purity iron and iron-based alloy were melted using a cold-crucible induction melting furnace under the ultra-high vacuum. Subsequent to that, the compatibility between the melted material and the high-temperature sodium environment which is a special feature of the fast reactor and tensile property at room and elevated temperatures were investigated using the melted materials. Also, the creep test using the high-purity 50%Cr-Fe alloy at 550C in air in order to understand the high temperature creep property. ln addition, the material properties such as thermal expansion coefficient, specific heat and electrical resistance were measured and to evaluate the outlook for the structural material for the fast reactor. The following results were obtained based on the property test and evaluation. (1)lt was possible to melt the about 10kg high-purity ingot and high-purity 50%Cr-Fe alloy ingot using a cold-crucible induction melting furnace under the ultra-high vacuum. (2)The tensile tests of the high-purity 50%Cr-Fe alloy were performed at room and elevated temperatures in order to understand the deformation behavior. From the experimental results, it was clear that the high-purity 50%Cr-Fe alloy possesses high strength and good ductility at elevated temperatures. (3)The physical properties (the thermal expansion coefficient and specific heat etc.) were measured using the high-purity 50%Cr-Fe alloy. lt was clear that the thermal expansion coefficient of high-purity 50%Cr-Fe alloy was smaller than that of SUS304. (4)From the corrosion test in liquid sodium, the ordinary-purity iron showed the weight loss after corrosion test. However the high-purity iron showed ...

Development programme of analytical techniques for ultra trace amounts of nuclear materials in environmental samples for safeguards-from a viewpoint of speciation technology

Hanzawa, Yukiko; Magara, Masaaki; Esaka, Fumitaka; Watanabe, Kazuo; Usuda, Shigekazu; Miyamoto, Yutaka; Gunji, Katsubumi; Yasuda, Kenichiro; Nishimura, Hideo; Adachi, Takeo

Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.167 - 172, 1999/00

no abstracts in English

Sequential separation of ultra-trace multi-elements including Pu

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.