Source term evaluation in containment vessel during late phase of severe accident, 18; Experiment on organic leach from paint in the containment vessel

Moriyama, Kiyofumi; Chiba, Noriaki; Tashiro, Shinsuke ; Nakamura, Hideo  ; Nakamura, Koichi*

Regarding the organic iodine production during a severe accident of light water reactors, the organic solvent leaching from paints has drawn attention as an important organic source. We measured the amount of organic solvent leaching from epoxy paint as time series data and examined its dependence on temperature, paint thickness and age. We developed also a leach behavior model considering equilibrium between the concentrations in the paint matrix and in the solution.