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[en] Surface decontamination by CF4-O2 gas plasma was studied. CF4-O2 gas plasma was used to produce active fluorine. Fluorine will react with elements on surface to form volatile gas. In this cold experiment, cobalt was used as contaminant on surface. Decontamination of cobalt obtained a good result with reaching 100% of decontamination efficiency during 200 seconds of plasma irradiation. Thermodynamic equilibrium calculation on CF4-O2 system containing cobalt served to elucidate their reaction mechanism. Thermodynamic equilibrium on CF4-O2 system containing actinide (U, Pu) and lanthanide (La, Gd) was also calculated respectively, and the results indicate that decontamination process by CF4-O2 gas plasma should be applicable also to these elements. (author)
Source
Sukarsono, R.; Ganang Suradjijo (National Nuclear Energy Agency, Yogyakarta (Indonesia)) (eds.); Centre for Research and Development of Advanced Technology, National Nuclear Energy Agency, Yogyakarta (Indonesia); 359 p; ISSN 0216-3128; 
; 2002; p. 44-48; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan dan Teknologi Nuklir; Yogyakarta (Indonesia); 27 Jun 2002; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 12 refs.; 1 tab.; 2 figs.
; 2002; p. 44-48; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan dan Teknologi Nuklir; Yogyakarta (Indonesia); 27 Jun 2002; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 12 refs.; 1 tab.; 2 figs.