Remobilization of tungsten dust from castellated plasma-facing components. (August 2017)

• Record Type: Journal Article
• Authors: De Angeli, M.; Tolias, P.; Ratynskaia, S.; Ripamonti, D.; Riva, G.; Bardin, S.; Morgan, T.; De Temmerman, G.
• Is Part Of: Nuclear materials and energy. Volume 12(2017)
• Page Start: 536
• Page End: 540
• Publication Date: 2017-08
• Subjects: Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2017.01.021
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: Controlled studies of dust remobilization from castellated plasma-facing components. W dust is efficiently trapped inside the gaps. Remobilization from the top of mono-blocks can enhance W dust trapping in the gaps. Abstract: Studies of tungsten dust remobilization from castellated plasma-facing components can shed light to whether gaps constitute a dust accumulation site with important implications for monitoring but also removal. Castellated structures of ITER relevant geometry that contained pre-adhered tungsten dust of controlled deposition profile have been exposed in the Pilot-PSI linear device. The experiments were performed under steady state and transient plasma conditions, as well as varying magnetic field topologies. The results suggest that dust remobilization from the plasma-facing monoblock surface can enhance dust trapping in the gaps and that tungsten dust is efficiently trapped inside the gaps.