Preparation of reference materials on radiochemical analysis for low-level radioactive waste generated from Japan Atomic Energy Agency

日本原子力研究開発機構の低レベル放射性廃棄物放射化学分析に用いる標準試料作製法の検討

石森 健一郎 ; 亀尾 裕 ; 中島 幹雄*; 高橋 邦明 

Ishimori, Kenichiro; Kameo, Yutaka; Nakashima, Mikio*; Takahashi, Kuniaki

In order to prepare simulated reference materials of solidified products using a laboratory-scale electric furnace instead of a plasma heating device, melting tests of miscellaneous simulated solid wastes were conducted. Under the optimum melting conditions, reference materials containing -ray emitting nuclides (Np, Am and Cm) or -ray emitting nuclides (Co, Cs and Eu) were prepared. For reference materials containing -ray emitting nuclides such as C and Cl, a preparation method with nuclear reaction N(n, p)C or Cl(n, )Cl by thermal neutron irradiation was attempted. The radioactivity concentrations of the reference materials were evaluated from radiochemical analysis. It was confirmed that the reference materials could be successfully prepared on the present preparation methods.