Impact of water ingress on deuterium release, oxidation, and dust generation in beryllium plasmafacing components

Impact of water ingress on deuterium release, oxidation, and dust generation in beryllium plasmafacing components

Impact of water ingress on deuterium release, oxidation, and dust generation in beryllium plasmafacing components 150 150 UKAEA Opendata
UKAEA-CCFE-PR(23)124

Impact of water ingress on deuterium release, oxidation, and dust generation in beryllium plasmafacing components

Beryllium samples from the JET ITER-like wall limiter tiles with either co-deposits or surface cracks caused by melt damage, were immersed into boiling water for 4 h 15 min to simulate and assess the impact of coolant water ingress into a tokamak on the state of Be components. Microscopy of the water-treated surfaces and the residue in the water revealed that no thermomechanical damage (cracking or exfoliation) occurred to the samples during the exposure. Ion beam analysis showed no measurable release from the samples. Combined ion beam analysis and Raman spectroscopy indicated only some degree of surface oxidation, but no thick oxide films were formed.

Collection:
Journals
Journal:
Nuclear Materials and Energy
Publisher:
Elsevier
Published date:
02/05/2023