Abstract
The diffusion behavior of 137Cs, 90Sr and 144Ce in CVD-ZrC was studied by measuring concentration profiles in ZrC and inner PyC layers of the coated particles, and the release from the particles during post-irradiation annealing. 90Sr diffusion in ZrC is found to be controlled by a volume diffusion mechanism at 1600°C; this is found also for 137Cs although it is influenced by micro-pores. The diffusion coefficient of 137Cs obtained from the analysis of the concentration profiles in ZrC 1.3 is D = 2.3 × 10 −3exp( −3.18 × 10 5 RT ) ( cm 2 s ) , where D is the diffusion coefficient, R the gas constant (8.314 J/mol · K) and T the temperature (K). In case of 144Ce, the volume diffusion is not so remarkable as 90Sr.
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.
