Development of Analysis Equipment for the Reprocessing Plant using Microchips Microchip, Analysis, Reprocessing, Thermal Lens, Uranium, Plutonium

Development of Analysis Equipment for the Reprocessing Plant using Microchips Kanagawa Academy of Science and Technology The University of Tokyo Saitama University Tokyo Institute of Technology Japan Atomic Energy Research Institute Toshiba Corporation 3R Corporation Manabu TOKESHI Takehiko KITAMORI Shiro MATSUMOTO Yasuhisa IKEDA Yasuji MORITA Koji MIZUGUCHI Hiroshi SUGAI Feasibility study on Development of Analysis Equipment for the Reprocessing Plant using Microchips is started in FY2003. keywordmicrochip, Analysis, Reprocessing, Thermal Lens, Uranium, Plutonium 1. Purpose In operation of the nuclear reprocessing plant, it is indispesable to analyze various samples for identifying status of process. The samples are collected at sampling points and pretreated for analyzing operation on each component. In the analyzing operation, waste solution is generated, because current analysis is based on processing balk volume samples. The major purpose of this feasibility study on Development of Analysis Equipment for the Reprocessing Plant using Microchips is to not only reduce generation of radioactive waste solution on the analytical operation, but also improve efficiency of analytical work. 2. Summary of achievements (1)Stability condition on dual phase flow of aqueous (3M-HNO3) and organic solution such as mixture solvent (30vol%TBP/70%n-dodecane) or 100vol%TBP in the micro-channel was experimentally elucidated. (2)alibration curvebetween uranium concentrations in organic phase and signals of thermal lens effect is experimentally obtained. (3)Useful information for design of microchips and detecting condition using thermal lens microscopes is obtained by literature survey, fundamental experiments and analysis using solvent extraction simulation code. Also, problems to be solved for realizing to develop analyzing equipment are clarified by on-site investigation of the reprocessing plant. 3. Conclusion Technical feasibility on each elemental technology for realizing the development of Analysis Equipment for the Reprocessing Plant using Microchips is experimentally verified. Based on these results, feasibility to develop the innovative analyzing system composed of microchip and thermal lens microscope would be studied in next fiscal year.

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Flow Injection Analysis, Thermal Lens Microscope,

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K-edge + XF 6+ U 4+ 5

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/ / M 1 cm 1 nm 1M 2M 3M 4M 5M 404 7.08 7.06 6.99 6.95 7.04 409 5.67 5.55 5.42 5.35 5.40 415 8.51 8.48 8.38 8.34 8.44 421 6.25 6.10 5.96 5.89 5.93 427 7.50 7.49 7.45 7.44 7.54 ε (M cm -1 ) -1 9 8 7 6 415 nm 427 nm 404 nm 421 nm 409 nm 5 0 1 2 3 4 5 6 [HNO 3 ] (M) / / M 1 cm 1 nm 1M 3M 5M 404 8.39 7.57 7.43 409 6.12 5.49 5.43 415 10.2 9.16 9.00 421 6.75 6.05 5.99 427 8.93 8.08 7.96 0.2 0.1 Abs. 0.5 0.4 0.3 0 ε (M -1 cm -1 ) 12 10 8 6 4 0 1 2 3 4 5 [HNO 3 ] (M) 415 nm 427 nm 404 nm 421 nm 409 nm 300 350 400 450 500 550 600 Wavelength (nm). 1M -TBP () 6 20

1 Abs. 0.8 0.6 0.4 404 415 0.1M 0.08M 0.06M 0.04M 0.02M 0.2 0 320 360 400 440 480 520 560 600 Wavelength (nm) [UO2 2+ ] ( ) 103.6 mm ( ) 4.07 mm ( ) 99.53 M 24.5 21

404 nm 415 nm -TBP -TBP 0.13614 0.0199 M 0.16519 0.0200 M 0.27490 0.0401 M 0.33125 0.0401 M 0.40802 0.0596 M 0.49321 0.0597 M 0.54393 0.0794 M 0.65514 0.0793 M 0.68202 0.0995 M 0.82236 0.0995 M ε404 = 6.85 M 1 cm 1 ε415 = 8.26 M 1 cm 1 404nm 415nm 6.85M 1 cm 1 8.26M 1 cm 1 6.99M 1 cm 1 8.38M 1 cm 1 404nm 415nm 7.57M 1 cm 1 9.16M 1 cm 1 / nm / M 1 cm 1 0.1M 0.1M ( ) 1M 404 6.85 6.99 7.57 415 8.26 8.38 9.16 22

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1M 2M 3M 4M 5M [UO2 2+ ]org 88.4 mm 95.3 mm 97.9 mm 99.5 mm 99.1 mm [UO2 2+ ] aq 15.1 mm 7.1 mm 4.5 mm 3.4 mm 2.8 mm [UO2 2+ ]total 103.5 102.4 102.4 102.9 101.9 5.85 13.4 21.8 29.3 35.4 1M 3M 5M [UO2 2+ ]org 0.410 M 0.473 M 0.478 M [UO2 2+ ]aq 0.549 M 0.519 M 0.509 M [UO2 2+ ]total 0.959 M 0.992 M 0.987 M 0.747 0.911 0.939 io Distribution rat 40 30 20 10 (a) 0.1 UO 2 2+ Distribution ratio 1.2 1 0.8 0.6 0.4 0.2 (b) 1M UO 2 2+ 0 0 1 2 3 4 5 6 [HNO 3 ] (M) 0 0 1 2 3 4 5 [HNO 3 ] (M) 6 24

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