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液体鉛ビスマス共晶合金中の酸素濃度測定実験; 酸素センサー製作と静的環境での測定

Measurement experiment of oxygen concentration in liquid lead-bismuth eutectic; Fabrication of oxygen sensor and measurement under static condition

菅原 隆徳  ; 山口 和司

Sugawara, Takanori; Yamaguchi, Kazushi

液体鉛ビスマス共晶合金(LBE)を用いた加速器駆動核変換システム(ADS)やJ-PARC核変換実験施設(TEF)のADSターゲット試験施設(TEF-T)等のLBE試験ループにおけるLBE中酸素濃度測定に資するため、酸素センサーを製作し、静的環境で酸素飽和濃度条件下におけるLBE酸素濃度測定実験を行った。製作したPt/Air型, Bi/Bi$$_2$$O$$_3$$型の2種類のセンサーのうち、Pt/Air型センサーについては、350$$^{circ}$$Cから450$$^{circ}$$CのLBE温度条件下で理論値とほぼ同じ起電力が得られた。ある程度の個体差は認められるものの、起電力値のばらつきも少なく、今後LBEループなどでの利用を考える上で、有望な概念が得られた。

The oxygen sensors to measure the oxygen concentration in liquid LBE (lead-bismuth eutectic) were fabricated for future use in LBE-cooled ADS (accelerator-driven system) or LBE test loops. Two types of oxygen sensors were fabricated and used for the measurement under the oxygen saturated condition. Through the measurement experiment, it was confirmed that the electromotive force (EMF) from Pt-type sensor was reliable under 350$$^{circ}$$C to 450$$^{circ}$$C LBE temperature. The Pt-type sensor will be the first candidate for the use in LBE test loops.

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