Research on the stability of fuel debris consisting of oxides and alloys, 14; Leaching behavior of actinides from the simulated debris and project summary

Kirishima, Akira*; Akiyama, Daisuke*; Sato, Nobuaki*; Sasaki, Takayuki*; Watanabe, Masayuki   ; Kumagai, Yuta   ; Kusaka, Ryoji  

Metal-alloyed debris would be formed by the reaction of nuclear fuels with the zircaloy cladding, control rods, and other reactor structural materials such as stainless steel (SUS) at high temperature at the Fukushima Daiichi nuclear power plant in Japan. In this study, some simulated debris synthesized by UO, SUS and zirconium and the result on the immersion test for simulated debris into water or seawater was reported. The structural evolution and dissolution ratio of U, Np, Am were determined in order to evaluate the chemical stability of simulated debris. The perspective of whole results of this project will be also summarized in this presentation.