Evaluation of elution reaction on fuel debri having two-phase by scanning electrochemical microscopy

Ambai, Hiromu 

The fuel debris which generated in the severe accident of Fukushima Daiichi Nuclear Power Plant (1F) of the Tokyo Electric Power Company Holdings, Inc. are under the water. Thus, it is important to understand the elution behavior of nuclear species in water. It has been reported that fuel debris consist of a number of phase by studies for TMI-2 and 1F accident. We can get only averaged information about all phases using normal methods. It is expected to have a better understanding about the elution mechanism of debris. In this study, we tried the evaluation of the elution reaction on fuel debris by getting the electrochemical properties of each phase, using scanning electrochemical microscopy which can measure local electrochemical property.