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Abstract

The transport of tritium in liquid Pb-17Li has been investigated for different types of capsules and different methods of tritium extraction. Equations describing the tritium release process have been set up and solved, and time-dependent expressions of the outcoming tritium flux have been derived for closed capsules containing stagnant or moving Pb-17Li and for capsules where a He + 0.1% H(2) flush gas sweeps the gas phase above the liquid Pb-17Li or bubbles through it. The analytical expressions of the outcoming tritium fluxes depend on tritium diffusivities and solubilities, in Pb-17Li and in the container material, and on the tritium generation rate in Pb-17Li. The models allow the determination of the characteristic tritium release times when these input parameters are available. The parameters, on the other hand, can be determined by fitting the experimental tritium release data with the theoretical flux equations. The characteristic tritium release time is 14000 s, 7200 s, 2000 s and less than 100 s for the closed stagnant, closed convective, swept and bubbled capsule, respectively, for the specific conditions of the "Libretto" experiment (Petten - NL).

Additional information

Authors: SAIBENE G, JET Joint Undertaking, Abingdon (GB);SARTORI R, JET Joint Undertaking, Abingdon (GB)
Bibliographic Reference: EUR 11865 EN (1988) 147 pp.
Availability: (2)
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