An alternative recovery method to the mechanical crushing of off-specification tristructural-isotropic (TRISO) coated fuel microspheres is demonstrated. It is shown that the inert SiC layer can be completely removed by etching with the active fluorine species from an inductively coupled radio-frequency CF 4 glow-discharge impinging a static bed from the top, at a working pressure of 1 kPa. At this pressure mass transport does not have a rate limiting role and the chemical reaction itself is rate determining.A treatment time of roughly four hours is required for the conditions reported here.
Die fluoorradikale wat in ’n nie-termiese CF4-radiofrekwensieplasma (glimontladingsplasma) opgewek word, reageer geredelik met silikoonkarbied (SiC) met die vorming van vlugtige SiF4 en CF4. In ’n spuitbedopstelling wat hier gebruik word, bewerkstellig dit binne 14 tot 15 h die volledige verwydering van die SiC-deklaag vanaf TRISO-partikels, met uitstekende beheer oor die proses vir analitiese en kwaliteitsbeheerdoeleindes. Die proseskinetika word deur massa-oordrag beheer.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.