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3級ピリジン型樹脂の再処理適用のための塩酸系耐食材料の評価,6; タンタル及びハステロイBの塩酸系腐食に対する$$gamma$$線照射の影響

Metal corrosion evaluation in hydrochloric acid media on tertiary pyridine-type resin applying to fuel reprocessing system, 6; Influence of $$gamma$$-ray irradiation to hydrochloric acid corrosion of Ta and Hastelloy-B

小山 真一  ; 藤井 靖彦; 黒澤 きよ子*; 花本 行生*; 蓼沼 克嘉*; 鈴木 達也*; 小澤 正基*

Koyama, Shinichi; Fujii, Yasuhiko; Kurosawa, Kiyoko*; Hanamoto, Yukio*; Tatenuma, Katsuyoshi*; Suzuki, Tatsuya*; Ozawa, Masaki*

3級ピリジン樹脂と塩酸を溶媒に用いる分離体系において、耐食材料としてTa、又はハステロイBを共存させた状態で$$gamma$$線を照射し、腐食挙動の評価を行った。その結果、Taはいずれの条件でも完全耐食性であること、ハステロイBの腐食速度は$$gamma$$線照射量に比例すること、を明らかにした。この腐食は、照射で生成した過酸化水素やオゾン等の酸化成分の影響であると推定された。

Corrosion experiment for Ta and Hastelloy-B was performed by $$gamma$$-ray irradiation under co-existence system of tertiary pyridine type resin and HCl media. As a result, Ta showed perfect anti-corrosion property under all experimental conditions. On the other hand, it was clear that the corrosion rate of Hastelloy-B was proportion to $$gamma$$-ray intensity. It is expected that oxidative species, such as hydrogen peroxide and ozone, were produced by irradiation, and were affected to corrosion.

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