THE BEHAVIOR OF RADIOLYTICALLY PRODUCED HYDROGEN IN A HIGH-LEVEL LIQUID WASTE TANK OF A REPROCESSING PLANT: HYDROGEN CONCENTRATION UNDER GAMMA IRRADIATION OF THE SIMULATED SOLUTION

摘要

Simulated high-level liquid waste was irradiated by ~(60)Co gamma radiation, and changes in the gas-phase concentrations of the products H_2, O_2, and NO_x that accumulated in the absence of sweeping air were measured. The H_2 concentration reached a steady-state value of much less than 4% in line with the value predicted from the previously derived mathematical expression. The simulated dissolver solution was also irradiated, and another steady-state H_2 concentration of much less than 4% was obtained in accordance with the corresponding predicted value. These experimental results lend strong support for the applicability of a mathematical expression in predicting the H_2 concentration in a tank in the case of a sweeping-air function loss.