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Improvement of fission gas analyzer

ガス分析装置の改良

上原 寛之; 小椋 数馬; 宇佐美 浩二; 二瓶 康夫; 仲田 祐仁

Uehara, Hiroyuki; Komuro, Kazuma; Usami, Koji; Nihei, Yasuo; Nakata, Masahito

RIA時のガス放出挙動を評価するため、GCのソフト及びハード両面からの改良を行った。ハードにおける改良として、PDDを用いることでTCDに対して50倍の感度での検出が可能となった。ソフトにおける改良では、オーバーラップしたKrとN$$_{2}$$のピークに対してETG関数を用いた解析により測定条件の変更を供わずに、Krの評価が可能となった。

For the accurate measurement of the released FP gas during RIA, Gas Chromatograph was improved with the hardware approach and the software one. As the hardware approach, PDD was added to the gas detector of GC and it can detect 50 times higher sensitivity compared with the TCD. As the software approach, ETG function was adopted to deconvolute the overlapped Kr peak from N$$_{2}$$ one. With ETG estimation, Kr volume can be evaluated with the deconvolution from N$$_{2}$$ peak in neither the long measurement time nor the changing measurement condition.

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