Development of advanced reprocessing system using high selective and controllable precipitants, 2; Evaluation of radiation and heat resistance of low coordinate and hydrophobic pyrrolidone derivatives

Maruyama, Koichi*; Nogami, Masanobu*; Ikeda, Yasuhisa*; Nishimura, Kenji*; Morita, Yasuji  

Radiation and heat resistance of low coordinate and hydrophobic pyrrolidone derivatives, NProP and NBP, which are selective precipitants for U(VI), was examined by -irradiation and heating of the 3M nitric and solutions of the precipitants. Test results of radiation resistance of NProP and NBP showed that the ability to make precipitate of U(VI) was kept until 0.5 MGy of irradiation. After the heating of the 3M nitric and solutions of NProP and NBP at 50 C, the molecular structures of NBP and NProP were changed within 4 days and 10days, respectively. It was found that the change of the structure does not weaken but reinforce the ability to make precipitate of U(VI), which would due to the increase of the hydrophobicity.