Spectrum prediction in X-ray fluorescence analysis using Bayesian estimation

Matsuyama, Tsugufumi*; Nakae, Masanori*; Murakami, Masashi; Yoshida, Yukihiko; Machida, Masahiko; Tsuji, Koichi*

Spectrochimica Acta, Part B, 199, p.106593_1 - 106593_6, 2023/01

https://doi.org/10.1016/j.sab.2022.106593

Current status and newly introduced analytical techniques for safeguards environmental samples at JAERI

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

Proceedings of INMM 46th Annual Meeting (CD-ROM), 8 Pages, 2005/00

JAERI has been developing analytical techniques for ultra-trace amounts of nuclear materials in the environmental samples in order to contribute to the strengthened safeguards system. Development of essential techniques for bulk and particle analysis of the environmental swipe sample has been established as an ultra-trace analytical method of uranium and plutonium. In January 2003, JAERI was qualified as a member of the IAEA network analytical laboratories for environmental samples. Since then, JAERI has conducted the analysis of domestic and the IAEA samples. From Japanese fiscal year 2003, the second phase of the project was started for the development of advanced techniques, such as analyzing minor actinides and fission products as well as uranium and plutonium, particle analysis using fission-track technique, more efficient particle analysis using ICP-TOFMS and screening by X-ray fluorescent analysis. This paper deals with the progress in the development of the new techniques, applications and future perspective.

Measurement of U and Pu concentration by X-ray fluorescence spectrometry using vertical irradiation system.

; ; ; Ikeda, Hisashi ; Jitsukata, Shu*; *

JNC TN8410 2000-022, 55 Pages, 2000/05

JNC-TN8410-2000-022.pdf:1.57MB

Measurement of U and Pu concentrations by wavelength dispersion type X-ray fluorescence spectrometry was studied. Sample holder was installed inside of glove box and other instruments, X-ray tube, monochromator and detectors were set out side of the glove box. X-rays was irradiated to sample though Be window. Fluorescent X-rays form sample were also passing though the same Be window and detected outside. Analytical conditions were optimized as follows. Sample thickness is 8 mm, which is 3ml of sample volume by the sample holder. Voltage and eurrent for X-ray tube is 50kV and 40 mA, respectively. Measurement was done twice, 60 seconds each, and averaged X-ray intensity was used to calculate elemental concentrations. Matrix correction was necessary to measure U and Pu concentration within 10% accuracy. Detection limits were calculated to 0.4 mg/L for U and 0.7mg/L for Pu. Calibration curve was liner up to 9 g/L fbr U and Pu. Two calculation methods, calibration curve method and standard addition method, were studied to measure Pu concentration in organic solution. Detection limit was 5.3 mg/L and 0.2 mg/L, respectively.

Analytical chemistry using synchrotron radiation

Baba, Yuji

Bunseki, 0(3), p.187 - 194, 1995/00

https://ci.nii.ac.jp/naid/10001676403

no abstracts in English

Scientific study on iron remains excarated from the ruins of Kaman-Kalehoeyuek, II

*; Nagano, Tetsushi; *

Anatoria Kokogaku Kenkyu, Vol.2 (Kaman, Karehoyukku 2), p.15 - 24, 1993/00

no abstracts in English

Cooperative Analysis of Zirconium and Zirconium Alloys by Fluoreseent X-ray Method

JAERI-M 86-198, 125 Pages, 1987/03

JAERI-M-86-198.pdf:2.98MB

no abstracts in English

The past 30 years' progress of radioisotope researches and applications in Japan; 4.Industry, 4.4 Analysis measurement

Radioisotopes, 30(SPECIAL ISSUE), p.46S - 48S, 1981/00

no abstracts in English

Application of radioisotope fluorescence to mineral exploration

Genshiryoku Kogyo, 25(5), p.60 - 62, 1979/00

no abstracts in English

Construction of a combined synchrotron radiation based simultaneous X-ray measurement system for simulated waste glass samples

Okamoto, Yoshihiro; Tanida, Hajime; Nagai, Takayuki

no journal, , 

We have used micro XAFS technique with a synchrotron radiation beam focused to 1 m for the analysis of simulated waste glass samples. It has been applied to the analysis of molybdate aggregates deposited in the glass sample. Simultaneous X-ray fluorescence (XRF) measurements are performed to determine what elements are present in the micro XAFS measurement area. By adding X-ray diffraction measurements using a flat panel sensor to these measurements, we plan to construct a combined XAFS-XRF-XRD analysis system. These combinations allow XAFS measurements to be performed while analyzing elemental composition and crystal form.

Analysis of U-Zr-Gd-O simulated fuel debris particles using micro XAFS, 1; Development of micro XAFS/XRF/XRD simultaneous measurement system

Okamoto, Yoshihiro; Akiyama, Daisuke*; Kirishima, Akira*; Tanida, Hajime

no journal, , 

In the synchrotron radiation analysis of fuel debris generated by the accident at the Fukushima Daiichi Nuclear Power Plant, it is necessary to deal with samples that are divided into several phases on a micron scale. In this study, we constructed a system to simultaneously measure XAFS, XRF, and XRD using synchrotron radiation focused on the micron order. Synchrotron radiation experiments using microbeams were performed at the BL22XU beamline of SPring-8, where a KB (Kirkpatrick-Baez) mirror was used to focus the beam to about 1m square. A transmission method XAFS measurement system was combined with a silicon drift detector (SDD) for XRF measurements and with a flat panel sensor for XRD measurements so that they could be measured simultaneously. As a result of the combinational used, it was confirmed that information on uranium valence from XAFS, composition ratio of uranium and zirconium from XRF, and crystal phase from XRD could be obtained for the same measurement field of view of 1m square.