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Development of hydrogen monitor; Applicability investigation of acoustic technique

水素モニターの開発; 音響手法の適用性検討

平林 勝; 荒 邦章 ; 日野 竜太郎

Hirabayashi, Masaru; Ara, Kuniaki; Hino, Ryutaro

既存の水素濃度モニターは、サンプリング方式のため過酷事故状況では使用できないので、音響手法を使用した新形式水素濃度モニターの開発を行っている。計測原理は、水素濃度に応じて混合ガスの音速が変化することを利用している。基本性能試験において、水素濃度を高精度で計測できること確認した。

Since existing hydrogen monitors cannot be used with the sampling method in severe accident conditions, a new type hydrogen monitor by using acoustic technique is under development. The measurement principle that the sound velocity is changed according to the hydrogen concentration in a mixed gas is utilized for the new type monitor. In the basic performance tests, it was confirmed that the hydrogen concentration could be measured in a high accuracy. Also, influence of environment conditions was evaluated.

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