Abstract
Tokamak reactor operation is accompanied by beryllium dust (powder) formation inside vacuum vessel as a result of plasma-facing armour erosion. This dust will be accumulated mainly within the grooves on armour hot surfaces. A significant safety problem associated with explosion hazard may be caused by hydrogen chemical production from overheated steam on beryllium dust at accident conditions of water in-leakage. However it is expected that this chemical reaction will become extinct due to limited diffusion of steam into narrow grooves. An analysis of the data on Be/steam chemical reaction rates at a temperature above 700 v °C has been carried out. Reaction features in porous medium (powder bulk) have been considered. The factors of steam/hydrogen binary diffusion have been determined. A calculation model for the reaction simulation is briefly described. The results of parametrical analysis are presented for various temperatures and pressures in the case of dust location on open surface and inside grooves....
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
