Download P1.192 Sample holder design for e ective thermal

29th Symposium on Fusion Technology (SOFT 2016)
Contribution ID :
49728
Type :
Poster
P1.192 Sample holder design for eective thermal
conductivity measurement of pebble-bed using laser
ash method
Monday, 5 September 2016 14:20 (1:40)
Content
The property of functional material for the design of the breeding blanket is very essential. Since
the stress due to the thermal load on breeding blanket structure is one of the main design driver,
the thermal property of the material is very important for thermal-structural and thermo-hydraulic
analysis. In particular, the thermal conductivity is one of necessary input data for these analyses
performed in order to understand the heat transfer phenomena and estimate the thermal stress.
Since for the functional materials of solid type breeding blanket a pebble-bed form is mainly adopted
instead of a bulk form such as a block or a disk, it should be needed to measure the thermal
conductivity of pebble-bed. In this study, the effective thermal conductivity of pebble-bed is
measured by laser flash method, which is one of the various thermal conductivity measurement
methods, because this method has several advantages such as a wide thermal conductivity range of
the measurement and a small amount of pebbles. A sample holder considering the heat transfer
mechanism from the laser source to pebble-bed has been specially designed in order to apply the
laser flash technique to the pebble-bed sample and it has been validated by the experiments. This
paper introduces preliminary results of the effective thermal conductivity on the pebble-bed using
this sample holder.
Co-author(s) :
LEE, Youngmin (NFRI, Daejeon, South Korea); KU, Duck Young (NFRI, Daejeon,
South Korea); PARK, Yi-Hyun (NFRI, Daejeon, South Korea); AHN, Mu-Young (NFRI, Daejeon,
South Korea); CHO, Seungyon (NFRI, Daejeon, South Korea)
Presenter(s) : LEE, Youngmin (NFRI)
Session Classication : P1 Poster session
Track Classication : I. Materials Technology