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Okano, Masanori; Jitsukata, Shu*; Kuno, Takehiko; Yamada, Keiji
Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM), 5 Pages, 2011/12
Surugaya, Naoki; Sato, Soichi; Jitsukata, Shu*; Watahiki, Masaru
Analytical Sciences, 24(4), p.527 - 530, 2008/04
Times Cited Count：2 Percentile：7.40(Chemistry, Analytical)Laser-induced photoacoustic spectroscopy was demonstrated in a quantitative analysis of Pu in nitric acid medium. Plutonium was quantitatively oxidized to Pu(VI) using Ce(IV). The photoacoustic measurement of Pu(VI) with maximum absorption at 830.5 nm was subsequently performed to determine the concentration. The photoacoustic signal was linearly proportional to the Pu(VI) ion concentration. The detection limit of Pu(VI) was estimated to be 0.5 
g/mL. By the proposed method, Pu concentration was successfully determined in a nuclear waste solution for use in nuclear materials management.
Kuno, Takehiko; Okano, Masanori; Sato, Soichi; ; Jitsukata, Shu*
Final Program Abst. P.60, 60 Pages, 2003/00
Kuno, Takehiko; Jitsukata, Shu*; ;
SYMPOSIUM ON SAFEGUARDS AND NUCLEAR MATERIAL MANAGEMENT, 0 Pages, 2002/00
None
; ; Jitsukata, Shu*; Kurosawa, A.; Ikeda, Hisashi
JNC TN8410 2001-017, 75 Pages, 2001/06
JNC-TN8410-2001-017.pdf:1.87MB
It has been required from IAEA to determine a small amount of plutonium in the high active liquid waste solutions (HALW) in the tokai reprocessing plant. High performance spectrophotometer (HPSP), which could be obtained lower detection limit than conventional spectrophotometer, is studied to be applied the inspection and verification analysis. The results of applicability test are described in this report, [Cold Test] Neodymium, showing an absorption peak near the absorption wavelength of plutonium (VI), was used as an alternative element to plutonium, in order to review the calculation method of the peak intensity. [Hot Test] Plutonium nitrate solution was used for the fundamental test of this method. Since the method is known to be influenced by acidity, suspended sludge and coexistent elements in a sample, each dependency was examined. It was found that measurement results varied about 14% at a nitric acid concentration of 2-4 mol/L. Sludge could be removed by filtration before the measurement. The effect of coexisting elements could be eliminated adjusting the optical balance between reference and sample beam intensity. In the case of measuring a low concentration plutonium solution, a ratio of the peak intensity to the background intensity (S/B ratio) was not enough to the measured low concentration of Plutonium. Therefore a method should be improved the S/B ratio by analyzing the obtained spectra. Data accumulation method, simple moving average method and Fourier transform analysis was tested. The results showed that a combination of the accumulated average method and the moving average method was the optimum method fbr the purpose. Linearity of the calibration curve was found between 0-11 mgPu/L. Synthetic sample solution, which simulated the actual constituents of the HALW with plutonium, showed a good linear relation at 0-11 mgPu/L. The detection limit for plutonium concentration was 0.07 mgPu/L. When the synthetic HALW solution containing plutonium was m
Kitao, Takahiko; Jitsukata, Shu*; Sato, Soichi; Ikeda, Hisashi ; Atsushi, Ishibashi,; Surugaya, Naoki
SYMPOSIUM ON SAFEGUARDS AND NUCLEAR MATERIAL MANAGEMENT, 0 Pages, 2001/00
None
Jitsukata, Shu*; ; ; ; Kurosawa, A.
JNC TN8410 2001-002, 66 Pages, 2000/12
JNC-TN8410-2001-002.pdf:2.03MB
It was required from IAEA to determine a small amount of plutonium in the high active liquid waste solutions (HALW) in the tokai reprocessing plant. High performance spectrophotometer (HPSP), which could be obtained lower detection limit than conventional spectrophotometer, is studied to be applied to the inspection and verification analysis by the IAEA. [Cold Test] Neodymium, showing an absorption peak near the absorption wavelength of plutonium (VI), was used as an alternative element to plutonium, in order to review the calculation method of the peak intensity. As a result, the three-point correction method was found to be simple and effective. [Hot Test] Plutonium nitrate solution was used the fundamental test of this method. Since the method is known to be influenced by acidity, suspended sludge and coexistent elements in a sample, each dependency was examined. It was found that measurement results varied about 14% at a nitric acid concentration of 2-4 mol/L. Sludge should be removed by filtration before the measurement. The effect of coexisting elements could be eliminated adjusting the optical balance between reference and sample beam intensity. In the case of measuring a low concentration plutonium solution sample, a ratio of the peak intensity to the background intensity (S/B ratio) is relatively small. Therefore a method should be improved the S/B ratio by analyzing the obtained spectra. Accumulated average method, moving average method and Fourier transform method was tested. The results showed that a combination of the accumulated average method and the moving average method was the optimum method for the purpose. Linearity of the calibration curve was found between 0-11 mgPu/L. Synthetic sample solution, which simulated the actual constituents of the HALW with plutonium showed a good linear relation at 0-11 mgPu/L. The detection limit for plutonium concentration was 0.07 mgPu/L. When the synthetic HALW solution containing plutonium was measured, the de
; ; ; 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.
; Jitsukata, Shu*; Surugaya, Naoki; ; Kuno, Yusuke
Proceedings of International Conference on Future Nuclear Systems (GLOBAL'97), 0 Pages, 1997/00
None
; Jitsukata, Shu*; ; ; ; Kuno, Yusuke
Proceedings of International Conference on Future Nuclear Systems (GLOBAL'97), p.1244 - 1247, 1997/00
None
nuclides in the high radioactive Cs component samples by the Solid-phase extraction disk for removal of Cs / spectrometryYamazaki, Yuki*; Okano, Masanori; Jitsukata, Shu*; Kuno, Takehiko; Kurosawa, Akira
no journal, ,
no abstracts in English
Suwa, Toshio; Okano, Masanori; Jitsukata, Shu*; Nemoto, Hirokazu*; Kuno, Takehiko; Kurosawa, Akira
no journal, ,
no abstracts in English
Okano, Masanori; Goto, Yuichi; Jitsukata, Shu*; Nemoto, Hirokazu*; Takano, Masato; Komoto, Norio; Kuno, Takehiko; Yamada, Keiji
no journal, ,
no abstracts in English
Okano, Masanori; Goto, Yuichi; Jitsukata, Shu*; Nemoto, Hirokazu*; Kuno, Takehiko; Yamada, Keiji
no journal, ,
no abstracts in English
Okano, Masanori; Nemoto, Hirokazu*; Jitsukata, Shu*; Yamada, Keiji; Sakai, Toshio
no journal, ,
no abstracts in English
Sr, 
Sr in high radioactive liquid wastes of Fukushima Daiichi Nuclear Power StationOkano, Masanori; Jitsukata, Shu*; Nemoto, Hirokazu*; Asai, Shiho; Kameo, Yutaka; Kuno, Takehiko; Yamada, Keiji
no journal, ,
no abstracts in English
