Thermal conductivity of compressed ceramic breeder pebble beds

Thermo-mechanical analyses and assessment with respect to the design codes and standards of the HCPB-TBM Breeder Unit

“…A continuum dummy material is used to model the pebble beds and appropriate properties are affected to simulate their discrete nature. Data on the thermal conductivities of the pebble beds have been obtained from J. Reimann et al [8,9,15]. The thermal contact conductance between beryllium and Li 4 SO 4 beds at the interface with the structural material have been implemented using the Yagi-Kunii model [10], although a low sensitivity to this parameter has been observed in the thermal response of the BU.…”

R&D status of key technologies for the development of KO TBM

“…In a last decade several attempts to find effective thermomechanical properties were focused on the breeder and the multiplier by various methods [15][16][17]. A Laser Flash Method (LFM) is non-contact and non-destructive method widely used in industry with covering a wide range of thermal conductivity.…”

Thermo-mechanical modelling of pebble bed–wall interfaces

“…The reference effective thermal conductivities can be found in Refs. [19,20,13] for both Li 4 SiO 4 and beryllium pebble beds. Li4SiO4 d = 0.5 mm; PF = 61.9%.…”