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Chemical decontamination using IF$$_7$$ gas

七フッ化ヨウ素ガスを用いた化学除染

秦 はるひ  ; 横山 薫; 杉杖 典岳

Hata, Haruhi; Yokoyama, Kaoru; Sugitsue, Noritake

原子力機構人形峠環境技術センターのウラン濃縮原型プラントにおける七フッ化ヨウ素ガスを用いた化学除染について実績データとその評価について報告を行う。七フッ化ヨウ素ガスを用いた除染では、98%を超える除去率が得られた。また、実績データを用いて除染のシミュレーションを行った。

The uranium enrichment facilities, located at Ningyo-toge in Japan, are contaminated by uranium fluorides. There is the risk of exposing the HF gas when the equipments will be dismantled. Therefore, we performed the systematic chemical decontamination by using IF$$_7$$ gas. This paper reports the actual results of the decontamination by using IF$$_7$$ gas. The result shows that the decontamination factor is approximately 100 or more. In addition, we performed the simulation of the reactions with IF$$_7$$ gas and uranium fluorides.

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