Diffusion coefficient of tritium in molten lithium-lead alloy (Li17Pb83) under neutron irradiation at elevated temperatures

Analysis of diffusion and dissolution of two-component hydrogen (H+D) in lead lithium

“…temperature range from 773 K to 973 K. The two diffusivities of H and D show slightly different temperature dependence but the solubility does almost the same one. Although the previous diffusivity data of H, D and T show a similar trend [4,7,8], isotope effects in diffusivity and solubility have not been clear. It is found in the present study that the diffusivity of H is around 1.4 times larger than that of D on average in the temperature range from 773 K to 973 K. The absolute value of diffusivity in the present experiment is slightly smaller than those in the previous data [9].…”

“…At least two necessary conditions of self-supplemental T production of TBR > 1 and authorized T leak to the outside of 1 g/year ( ∼ =10 Ci/day) should be achieved in blankets. Diffusivity and solubility of hydrogen isotopes including T in Pb-Li were determined by some researchers [4][5][6][7][8].…”

Safety Assessment of the ARIES Compact Stellarator Design

“…23. Given the conditions expected in the permeator, the mass transport coefficient for tritium in the PbLi based on the above correlation is ;1.2 mm0s.…”

The engineering sizing of the packed desorption column of hydrogen isotopes from Pb–17Li eutectic alloy. A rate based model using experimental mass transfer coefficients from a Melodie loop

“…The correlations (12) and (13) for k L a of hydrogen and tritium on Mellapak 752Y at 673 K are deduced from the data measured by Alpy et al [5,6] on the Melodie loop. The k L a values are three times lower than that predicted by the RBF [3,4] model.…”

“…3). The regression of the experimental data from the Melodie loop identifies the following relation for the volumetric mass transfer coefficient of hydrogen on Mellapak 750Y at 673 K k L a H = 1.90 · 10 −4 · B 0.869 (12) This correlation for hydrogen can be recalculated for tritium using following relation between mass transfer coefficient and diffusivity resulting from the penetration model of unhindered liquid flow along the interface k L ∝ D 0.5 . The diffusivity of tritium was taken from Section 3.1.…”