Исследование процесса накопления дейтерия в сплаве CuCrZr методом термодесорбционной спектроскопии

Abstract

ITER is presently the world's key thermonuclear project. This reactor should operate under the conditions of increased thermal and power loads. In this regard, an analysis of the behavior of structural materials during the reactor operation is an important theoretical and experimental problem. During the ITER operation, an important factor that affects the fuel turnover is the capture of hydrogen isotopes (especially radioactive tritium) into the reactor structural materials, which has an effect on both the radiation environment and the plasma parameters as a whole. Annealed CuCrZr alloy samples saturated in deuterium at various temperatures were studied using the thermal desorption spectroscopy (TDS) method at different saturation temperatures equal to 350oC, 400oC, 450oC, and 500oC. The saturation was carried out at a pressure of 5 atm for 25 h. The deuterium capturing process was studied on the TDS setup located at the NRC Kurchatov Institute. In the course of thermal desorption spectroscopy, samples were heated to a temperature of 977oC at a rate of 0.5 K/s. The influence of alloying additions in the CuCrZr alloy was analyzed. It is shown that in the obtained thermal desorption spectra there is a shift in the deuterium yield peak to the region of higher temperatures and an increased capture of deuterium with an increase in the sample saturation temperature in gaseous deuterium.