The adsorption of fission products on VHTR structural materials

The Very High Temperature Reactor (VHTR) is being considered as a candidate for the next generation of nuclear reactors. There are several areas that require further study in VHTR reactor designs. One such area is the adsorption of fission products on the reactor’s structural materials, such as graphite and stainless steel. It is important to know how much of these fission products have adsorbed on various parts of the reactor both for the purposes of understanding the possible activity of the components during maintenance operations, and also to quantify potential releases of these fission products during accident scenarios. The adsorption of fission products on reactor materials has been studied in the past, but further data are required.