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抽出クロマトグラフィを用いたステンレス配管試料に含まれる$$alpha$$核種の分析

Analysis of alpha nuclides in stainless steel using extraction chromatography

島田 亜佐子 ; 原賀 智子   ; 亀尾 裕 ; 中島 幹雄; 高橋 邦明 

Shimada, Asako; Haraga, Tomoko; Kameo, Yutaka; Nakashima, Mikio; Takahashi, Kuniaki

ステンレス表面などに付着した$$alpha$$核種の分析法として抽出クロマトグラフィーを適用した。まず、ステンレス表面を混酸(硝酸:塩酸:水=1:1:4)で溶解し、これにThとU、又はPuとAmを添加して試料溶液を作成し、UTEVAレジン又はTRUレジンに通液して分離した。いずれの核種も意図した画分で80%以上回収できた。そこで、この手法を用いて原子炉廃止措置研究開発センターのふげん発電所から発生した原子炉冷却系のステンレス配管に含まれるこれらの核種の分析をした。

Extraction chromatography technique was applied to analysis of alpha nuclides stuck on surface of stainless steel. Firstly, the surface of stainless steel was dissolved with mixed acid (nitric acid: hydrochloric acid: water = 1:1:4), and then Th and U or Pu and Am were spiked. These solutions were introduced into UTEVA or TRU resins and alpha nuclides were separated. All of the experimented nuclides were recovered in the expected fractions and these recovery percents were over 80%. These methods were applied to analysis of alpha nuclides in pipings of cooling system of Fugen power plant, Advanced Thermal Reactor.

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