EVALUATION OF THE POTENTIAL DIFFERENCE INDUCED BETWEEN PLATINUM-ELECTRODES WITH AND WITHOUT GAMMA-RAY IRRADIATION

By irradiating (60)Coy-rays to solutions with argon (Ar) or carbon dio xide (COL), it is confirmed that the potential of electrode under gamm a-rays shows a sharp reduction during an early period and that concent ration cell is formed to give potential difference (PD) between electr odes with and without exposure. When Ar is purged through solution, th e absolute value of PD shows a linear relation with dose rate (R) on l og-log scale [equation (9)] whereas there is not a good correlation be tween PD and R in the solution with CO2. In the light of concentration cell thus formed, some concepts are preliminary discussed to control the adverse effect of radiation-enhanced localized corrosion taking pl ace in nuclear power plants. (C) 1997 Elsevier Science Ltd. All rights reserved.