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Journal Articles

Reaction of Np, Am, and Cm ions with CO$$_{2}$$ and O$$_{2}$$ in a reaction cell in triple quadrupole inductively coupled plasma mass spectrometry

Kazama, Hiroyuki; Konashi, Kenji*; Suzuki, Tatsuya*; Koyama, Shinichi; Maeda, Koji; Sekio, Yoshihiro; Onishi, Takashi; Abe, Chikage*; Shikamori, Yasuyuki*; Nagai, Yasuyoshi*

Journal of Analytical Atomic Spectrometry, 38(8), p.1676 - 1681, 2023/07

https://doi.org/10.1039/D3JA00136A
 Times Cited Count：1 Percentile：0.02(Chemistry, Analytical)

Oral presentation

Development of ultramicro analysis technology for fuel debris analysis, 5; Consideration of analytical methods for actinide elements with ICP-MS/MS

Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*; Suzuki, Tatsuya*

no journal, , 

Inductively coupled plasma mass spectrometry with triple quadrupoles (ICP-MS/MS) is one of the promising techniques for rapid and highly sensitive wet analysis of fuel debris in Fukushima Daiichi Nuclear Power Plant. The collision/reaction cell technology implanted in ICP-MS/MS is available option to eliminate isobaric interferences, being expected to simplify the pretreatment of fuel debris analysis. In this study, ICP-MS/MS measurements of $$^{238}$$U and $$^{232}$$Th with collision/reaction gases were performed. On the basis of their gas reactivity, analytical methods for U will be discussed.

Oral presentation

Development of ultramicro analysis technology for fuel debris analysis, 15; Mutual discrimination of Am/Cm using ICP-MS/MS

Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Suzuki, Tatsuya*; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*

no journal, , 

Triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) is attractive technique to perform rapid and accurate analysis of fuel debris in Fukushima Daiichi Nuclear Power Plant. The collision/reaction cell technology incorporated in ICP-MS/MS is an available option to eliminate isobaric interferences, being expected to simplify the pretreatment of fuel debris analysis. When fuel debris contains Am and Cm, the pretreatment involving Am/Cm separation is difficult due to similarly chemical behavior of these actinides. In this study, ICP-MS/MS measurements of $$^{241}$$Am and $$^{244}$$Cm injecting CO$$_{2}$$ were carried out. From the obtained results, we suggest candidate conditions to discriminate the isobars of these actinides by use of the differences in their molecular ion formation tendency with variation of CO$$_{2}$$ flow rate.

Oral presentation

Prediction of gas-phase reactivity of actinide ions using triple quadrupole ICP-MS for fuel debris analysis

Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Suzuki, Tatsuya*; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*

no journal, , 

Triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) is an attractive technique to perform rapid and highly sensitive analysis. The collision/reaction cell (CRC) technology incorporated in ICP-MS/MS is an available option to eliminate isobaric interference, being expected to discriminate actinide nuclides involved in fuel debris. Meanwhile, in order to discriminate against these isobaric interferences using ICP-MS/MS, it is necessary to understand actinide gas-phase reaction behavior associated with the injection of reaction gases into the CRC. In the present work, the actinide molecular ion formations correlating with the excitation energy from the ground state of actinide monoatomic cation to their reactive state (5f$$^{n-2}$$6d$$^{2}$$) were investigated by injection of reaction gases into CRC. The obtained correlations allow us to predict the reaction behaviors towards mutual discrimination of actinide series using ICP-MS/MS.

Oral presentation

Estimation of reaction constants of actinide ions with O$$_{2}$$ in reaction cell in triple quadrupole inductively coupled plasma mass spectrometry

Kazama, Hiroyuki; Konashi, Kenji*; Suzuki, Tatsuya*; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Abe, Chikage*; Nagai, Yasuyoshi*

no journal, , 

Ultratrace analysis technique is important to understand fuel debris in nuclear reactor core after sever accident. Ion-molecule reactions of actinides ($$^{237}$$Np, $$^{241}$$Am and $$^{244}$$Cm) in a reaction cell were measured by inductively coupled plasma mass spectrometry (ICP-MS/MS). These nuclides are included in fuel debris. A gas-phase ion-molecule reaction model has been developed to simulate the gas phase reactions in the reaction cell. The results of model simulation are good agreement with the flow rates dependences of experimental data accurately.

Oral presentation

Development of dissolution method for sparingly soluble materials involving uranium oxides

Kazama, Hiroyuki; Ma, Z.*; Suzuki, Tatsuya*; Konashi, Kenji*; Matsuo, Satoru*; Yoshida, Kenta*; Homma, Yoshiya*; Watanabe, Makoto*; Abe, Chikage*; Suzuki, Katsuya*

no journal, , 

no abstracts in English

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