Development of the desalting method for gross alpha activity determination (Contract research)

Koike, Yuko; Yamada, Ryohei; Nagaoka, Mika; Nakano, Masanao; Ono, Yosuke; Suitsu, Yuichi

JAEA-Technology 2021-011, 39 Pages, 2021/08

JAEA-Technology-2021-011.pdf:1.56MB

In the Analyzed Liquid Treatment Facility of Japan Nuclear Fuel Co., Ltd. (JNFL) MOX Fuel Fabrication Plant (J-MOX), the interfere by salts with the analysis of gross alpha activity concentration analysis will be caused during the treatment process. Therefore, JNFL devised the desalting method using a solid-phase extraction chromatography. Japan Atomic Energy Agency carried out the experimental study to confirm the validity of this desalting method for the treatment liquid based on the contract with JNFL. This study consists of three experiments as follows: Step 1 - Selection of an optical solid-phase extraction agent, Step 2 - Evaluation of variation optical solid-phase extraction agent, and Step 3 - Application of the imitation liquid waste. The result of Step 1 determined the solid-phase extraction agent (InertSep ME-2) and the optimum condition (aspiration method by manifold (about 5-10 mL/min), 3M nitric acid as eluent, pH: 5, and no adjustment of ionic valence). Then, the result of Step 2 and 3 made sure the validation of this method by obtaining over 70% recovery for the imitation liquid waste sample of the Analyzed Liquid Treatment Facility of J-MOX.

Separation technique using column chromatography for safeguards verification analysis of uranium and plutonium in highly-active liquid waste by isotope dilution mass spectrometry

Yamamoto, Masahiko; Taguchi, Shigeo; Horigome, Kazushi; Kuno, Takehiko

Proceedings of IAEA Symposium on International Safeguards; Building Future Safeguards Capabilities (Internet), 8 Pages, 2018/11

In this study, the single-column extraction chromatographic separation has been developed for analysis of U and Pu in highly active liquid waste by isotope dilution mass spectrometry (IDMS). The commercially available TEVA resin is selected as an extraction chromatography resin. The U is chromatographically separated from fission products (FP) elements by nitric acid while Pu(IV) is adsorbed on the resin. After that, Pu is eluted by reducing to Pu(III). The method has been successfully achieved the separation with yielding the enough recovery and sufficient decontamination factors for subsequent IDMS analysis. The column dose rate after the FP removal is decreased to the background. The analytical results obtained by the developed method are in a good agreement with those of the conventional method. It provides simple and rapid separation and expected that the method can be applied to join IAEA/Japan on-site analytical laboratory.

α線放出核種の多核種同時分析方法

松枝 誠; 寺島 元基; 飯島 和毅

高貝 慶隆*

JP, 2021-182438  Patent licensing information

【課題】煩雑な工程を必要とせずに、α線放出核種を同時に複数種定量分析することができる方法を提供する。 【解決手段】固相抽出用樹脂を備えたカラム2に試料溶液を導入し、カラム2の固相抽出用樹脂に試料溶液に含まれるα線放出核種を吸着させ、固相抽出用樹脂に吸着されたα線放出核種をグループごとに溶離液に溶出させ、当該溶離液を霧化してプラズマイオン源5に導入してイオン化し、当該イオン群に酸素又はアンモニアを導入して、それらガスとの反応により当該元素のイオンの質量を変換し、次いで、四重極マスフィルター9において特定の質量数を持つイオンを除去し、四重極マスフィルター9を通過したα線放出核種の特定信号を測定する。

Quantitative analysis of humic substances dissolved in sedimentary groundwater in Japanese coastal areas

Terashima, Motoki; Endo, Takashi*; Kimuro, Shingo; Miyakawa, Kazuya

no journal, , 

no abstracts in English

Interference removal for high-sensitivity rapid analysis of Pd in radioactive rubbles by ICP-MS/MS

Iwahashi, Hiroyuki; Do, V. K.; Furuse, Takahiro; Ota, Yuki; Homma, Shunta; Kurosawa, Kiyoko*; Motoki, Yoshiaki*; Hirosawa, Takashi

no journal, , 

The radiometric determination of beta emitting Pd (half-life of 6.5 million years) requires a multiple-step chemical separation and a time-consuming radioactive measurement. Inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) with recent technological advances in interference removal by two quadrupole mass filters and a collision/reaction cell could be an alternative for highly sensitive analysis of long-lived radionuclides. In this study, we have developed an analytical method for the determination of Pd in concrete rubble by ICP-MS/MS combined with single-column chromatographic separation. A simplified procedure for the separation of Pd from concrete matrices was developed. The measurement condition was optimized to completely suppress the interference including the isobar Ag and the sample matrices. The application of the developed method to radioactive concrete rubble is under consideration.

Development of HCl-free analysis method of Cd using liquid scintillation counter

Ito, Chihiro; Tanaka, Yasuyuki; Kurosawa, Kiyoko*; Motoki, Yoshiaki*; Do, V. K.; Furuse, Takahiro

no journal, , 

In this presentation, an HCl-free analytical method for Cd in aqueous solution samples containing multiple radionuclides by liquid scintillation counting is reported. We aimed to develop a chemical separation procedure of Cd from co-existing nuclides such as Co and/or Fe, which interfere with the beta-counting. The use of hydrochloric acid (HCl) was avoided to prevent facilities from corrosion. Accordingly, after a sample-matrix separation with a chelating disk, Cd was adsorbed on a cation exchange resin and then selectively eluted by sodium thiosulfate (NaSO), which has a high affinity for Cd. This developed method allowed the separation and purification of Cd from the sample matrix without the use of halogen acids.

Development of the desalting method for total alpha activity determination, 1; Introduction and overview of the desalting performance test by solid-phase extraction

Hosokawa, Tomoaki*; Fujiwara, Hideki*; Kamoshida, Shuichi*; Anzai, Kiyoshi*; Nakano, Masanao; Koike, Yuko; Yamada, Ryohei; Nagaoka, Mika

no journal, , 

no abstracts in English

Development of simultaneous analytical method for Zr and Mo based on solid phase extraction combined with ICP-MS/MS, 1; Sequential chemical separation of Zr and Mo from Nb

Furuse, Takahiro; Do, V. K.; Aita, Rena; Ota, Yuki; Murakami, Erina; Tomitsuka, Tomohiro; Sano, Yuichi; Akimoto, Yuji*; Endo, Tsubasa*; Katayama, Atsushi; et al.

no journal, , 

In order to simplify the analysis of Zr and Mo in radioactive waste from conventional radiation measurement, we have considered analysis method combining solid-phase extraction and ICP-MS/MS. In this presentation, we report the results of a study on sequential chemical separation of Zr and Mo from Nb and sample matrix using ZR resin as a solid-phase extraction resin.

Influence of sample matrix on simultaneous actinide determination by online solid phase extraction-inductively coupled plasma-mass spectrometry

Matsueda, Makoto; Yanagisawa, Kayo; Kawakami, Tomohiko*; Teruyama, Yuko*; Toyoda, Yamato*; Otsuki, Hibiki*; Takagai, Yoshitaka*

no journal, , 

Inductively coupled plasma mass spectrometry (ICP-MS) can measure actinides simultaneously, but isobaric interferences between actinides inhibit quantification. We combined solid-phase extraction (SPE) using DGA resin (Eichrom Technologies) and ICP-MS with oxygen reaction in a collision and reaction cell (CRC) to simultaneously measure Th, U, Pu, Am and Cm isotopes. The method is automated as an on-line SPE-ICP-MS/MS consisting of flow injection with SPE column and ICP-MS/MS, but the quantification includes a risk of variability due to the sample matrix. In this study, various sample types were applied and the impact of the sample matrix on the analysis system was assessed.