Fusion Science and Technology / Volume 54 / Number 1 / July 2008 / Pages 131-134
Technical Paper / Blanket Design / dx.doi.org/10.13182/FST54-131
The diffusion, solution and permeation coefficients of hydrogen isotopes in liquid Li-Pb which is a candidate liquid blanket material for fusion reactors were determined in the temperature range 573-973K using an unsteady permeation method. Each coefficiens was correlated to temperature as follows:
DLi-Pb = 1.8 × 10-8 exp(-11590/RT) [m2/s] (1)
KLi-Pb = 2.1 × 10-6 exp(-18700/RT) [1/Pa0.5] (2)
PLi-Pb = 1.8 × 10-9 exp(-30290/RT) [mol/msPa0.5] (3)
The hydrogen permeation flux depends on the square root of pressure at 773-973K. Although the power of pressure declined below 0.4 when temperature was below 673K, the effects of surface resistance were neglected above 673K.
The hydrogen solubility in liquid Li-Pbwas found to correlate with a Sievert's constant.
We calculated a height-equivalent to theoretical-plate of a gas-liquid countercurrent extraction tower for tritium recovery rates in liquid Li-Pb to be
HL = 7.0 × 10-2 [m] (4)