Swelling of irradiated beryllium during isothermal annealing

Tritium release from highly neutron irradiated constrained and unconstrained beryllium pebbles

“…8c and d). The sub-grain walls are more visible in this case than at lower irradiation temperatures, probably, due to their decoration by denuded zones which are free of helium bubbles [18]. For this irradiation temperature, the thickness of the denuded zones is maximal in the bulk and decreases by approaching the pebble surface.…”