Solubility and diffusivity of hydrogen isotopes in liquid Pb17Li

Reiter, F.

doi:10.1016/0920-3796(91)90003-9

Cited by 112 publications

(71 citation statements)

References 10 publications

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“…The theoretical solubility of tritium in liquid Li 17 Pb 83 alloy was calculated under saturation conditions and a value of 2.7 × 10 7 Bq/kg was obtained [8]. The purities of helium and hydrogen were 99.995%, and that of deuterium was 99.95%.…”

Section: Experimental Instrument and Methodsmentioning

confidence: 99%

Trace tritium recovery from the residue of liquid Li17Pb83 alloy

2010

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The liquid Li 17 Pb 83 alloy is a prominent breeder material for use in a fusion reactor. In the design of an effective tritium extraction system for the liquid lithium lead bubbler of the test blanket module of such a reactor, finding ways to strictly limit the losses of tritium and to minimize radioactive risks is very important. For this purpose, the isotope exchange process has been investigated as a means of trace tritium recovery from a model of the residue from Li 17 Pb 83 alloy. The results indicate that the isotope exchange process is an effective means of tritium recovery from the residue of Li 17 Pb 83 alloy, and the optimum composition of the exchange carrier gas is He + 0.1% D 2 . The exchange temperature and number of exchange steps are the main factors influencing the efficiency of tritium recovery from the residue. Trace tritium recovery efficiency increases with increasing exchange temperature and number of times of exchange. Tritium recovery efficiency can approach 80% when the residue is treated six times at 823 K. A gas-liquid two-phase contact model to describe the proceeding of tritium release from the liquid Li 17 Pb 83 alloy has been derived on the basis of this experiment.Li 17 Pb 83 alloy, tritium recovery, isotope exchange, carrier

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Section: Experimental Instrument and Methodsmentioning

confidence: 99%

Trace tritium recovery from the residue of liquid Li17Pb83 alloy

2010

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“…Preliminary results obtained by direct application of this model show that, in the presence of a nucleation event or a growing gas phase, like in the case of LLE within a fusion reactor, where Helium and Tritium bubbles are generated due to nuclear reactions from 6 Li, the hydrogen isotope inventory in the gas phase should be taken into consideration. Hence, some hydrogen extraction processes, like gas-liquid contactors can be assumed to work on the basis that hydrogen isotope concentration in the gas bubbles is the saturation concentration.…”

Section: Discussionmentioning

confidence: 99%

“…Helium and tritium are generated in the bulk LLE at the same rate by nuclear reactions from 6 Li. Sec.…”

Section: Introductionmentioning

confidence: 99%

The effect of a micro bubble dispersed gas phase on hydrogen isotope transport in liquid metals under nuclear irradiation

Fradera

Cuesta‐López

2013

Fusion Engineering and Design

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The present work intend to be a first step towards the understanding and quantification of the hydrogen isotope complex phenomena in liquid metals for nuclear technology. Liquid metals under nuclear irradiation in ,e.g., breeding blankets of a nuclear fusion reactor would generate tritium which is to be extracted and recirculated as fuel. At the same time that tritium is bred, helium is also generated and may precipitate in the form of nano bubbles. Other liquid metal systems of a nuclear reactor involve hydrogen isotope absorption processes, e.g., tritium extraction system. Hence, hydrogen isotope absorption into gas bubbles modelling and control may have a capital importance regarding design, operation and safety.Here general models for hydrogen isotopes transport in liquid metal and absorption into gas phase, that do not depend on the mass transfer limiting regime, are exposed and implemented in OpenFOAM R CFD tool for 0D to 3D simulations. Results for a 0D case show the impact of a He dispersed phase of nano bubbles on hydrogen isotopes inventory at different temperatures as well as the inventory evolution during a He nucleation event. In addition, 1D and 2D axisymmetric cases are exposed showing the effect of a He dispersed gas phase on hydrogen isotope permeation through a lithium lead eutectic alloy and the effect of vortical structures on hydrogen isotope transport at a backward facing step.Exposed results give a valuable insight on current nuclear technology regarding the importance of controlling hydrogen isotope transport and its interactions with nucleation event through gas absorption processes.

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“…With nominal tritium transport data in Pb15.7Li [2][3][4][5], EURO-FER97 [4,6] and AISI316L [4] (see Table 2) the order of magnitude of the experimental release rates are naturally obtained. Major flux sensitivities are obtained, in order, for:…”

Section: Model Sensitivities: Fitting Libretto-4 Experimental Releasementioning

confidence: 99%

“…Reference tritium transport data for Pb15.7Li [2][3][4][5], AISI316L [4], EUROFER97 [4,6]. values are assumed during the irradiation starting transients to fit releases consistently.…”

Section: Tablementioning

confidence: 99%