Friday morning session: Modeling and experiments of pebble bed thermomechanics and properties • Ahn (NFRI, KO) • Laser flash method for effective thermal diffusivity measurement of pebble bed • Application of laser flash method to characterize pebble beds thermal properties • Laser flash method cover wide range of thermal conductivity • Challenging experimental apparatus set up to meet the geometrical requirements of pebble beds. • Exploitation of laser flash apparatus for ceramic breeder on going based on the results on graphite • Results and development of the experiment to be monitored! • Orlandi (Pisa, IT) • Thermal conductivity of ceramic pebble beds used as breeder in fusion nuclear reactors • Challenging experimental set up • Interesting benchmark with FE analyses • Future development of the experiment to be monitored!
Friday morning session: Modeling and experiments of pebble bed thermomechanics and properties • Annabatula (KIT, D) • Crushing analyses of pebbles in pebble beds • Recent development of advanced modeling of pebble beds • Cubic cell with 5000 pebbles with the same size: study of the damage • Challenging future perspectives: polidispersed bed, crush of pebbles in the model • Future development and implementation of the results in the design process to be followed by close. • Van Til (NRG, N) • Overview of the pebble bed assemblies irradiation experiments • Exhaustive overview of the PBA experiments from the design of the PBA, the irradiation campaign and the results of the PIE. • Extremely useful for the community: same next time for HICU? • Van Lew(UCLA, US), Annabatula (KIT, D) • Discussion on current status and outlook of thermo mechanical research and development for blaket beds • Key question to the community about the role of the modeling in the design process, the needs in terms of physical properties • Answer of different experts should be collected, documented and given as input for the next CBBI.