Non-uniform polonium distribution in lead–bismuth eutectic revealed by evaporation experiments

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Non-uniform polonium distribution in lead–bismuth eutectic revealed by evaporation experiments. / Gonzalez, Borja; Aerts, Alexander; Lim, Jun; Rosseel, Kris; Van den Bosch, Joris; Mariën, An.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 302, No. 1, 22.06.2014, p. 195-200.

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@article{8402edf09e7e41bfaf943a877a77269f,
title = "Non-uniform polonium distribution in lead–bismuth eutectic revealed by evaporation experiments",
abstract = "Understanding polonium evaporation from lead-bismuth eutectic (LBE) is required for the design of nuclear installations that use liquid LBE as coolant or spallation target. In the present study we measured the time-dependent release of polonium from LBE samples in Ar/5 %H2 and Ar between room temperature and 500 C. Our experiments revealed that the majority of polonium in the samples evaporated according to established temperature correlations for the Henry constant of polonium in LBE. However a small fraction of polonium in the LBE behaved differently, causing a relatively large but transient polonium release at the start of evaporation experiments. We showed that this volatile fraction of polonium was located near the sample surface and was formed after prolonged exposure of the samples to air at room temperature. We speculate that the peculiar evaporation behavior of this surface polonium is caused by enrichment and association with an oxide layer.",
keywords = "LBE, lead bismuth eutectic, Liquid metal, evaporation, Polonium, MYRRHA",
author = "Borja Gonzalez and Alexander Aerts and Jun Lim and Kris Rosseel and {Van den Bosch}, Joris and An Mari{\"e}n",
note = "SCORE=10",
year = "2014",
month = jun,
day = "22",
doi = "10.1007/s10967-014-3264-1",
language = "English",
volume = "302",
pages = "195--200",
journal = "Journal of Radioanalytical and Nuclear Chemistry",
issn = "0236-5731",
publisher = "Springer",
number = "1",

}

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TY - JOUR

T1 - Non-uniform polonium distribution in lead–bismuth eutectic revealed by evaporation experiments

AU - Gonzalez, Borja

AU - Aerts, Alexander

AU - Lim, Jun

AU - Rosseel, Kris

AU - Van den Bosch, Joris

AU - Mariën, An

N1 - SCORE=10

PY - 2014/6/22

Y1 - 2014/6/22

N2 - Understanding polonium evaporation from lead-bismuth eutectic (LBE) is required for the design of nuclear installations that use liquid LBE as coolant or spallation target. In the present study we measured the time-dependent release of polonium from LBE samples in Ar/5 %H2 and Ar between room temperature and 500 C. Our experiments revealed that the majority of polonium in the samples evaporated according to established temperature correlations for the Henry constant of polonium in LBE. However a small fraction of polonium in the LBE behaved differently, causing a relatively large but transient polonium release at the start of evaporation experiments. We showed that this volatile fraction of polonium was located near the sample surface and was formed after prolonged exposure of the samples to air at room temperature. We speculate that the peculiar evaporation behavior of this surface polonium is caused by enrichment and association with an oxide layer.

AB - Understanding polonium evaporation from lead-bismuth eutectic (LBE) is required for the design of nuclear installations that use liquid LBE as coolant or spallation target. In the present study we measured the time-dependent release of polonium from LBE samples in Ar/5 %H2 and Ar between room temperature and 500 C. Our experiments revealed that the majority of polonium in the samples evaporated according to established temperature correlations for the Henry constant of polonium in LBE. However a small fraction of polonium in the LBE behaved differently, causing a relatively large but transient polonium release at the start of evaporation experiments. We showed that this volatile fraction of polonium was located near the sample surface and was formed after prolonged exposure of the samples to air at room temperature. We speculate that the peculiar evaporation behavior of this surface polonium is caused by enrichment and association with an oxide layer.

KW - LBE

KW - lead bismuth eutectic

KW - Liquid metal

KW - evaporation

KW - Polonium

KW - MYRRHA

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/19548760

U2 - 10.1007/s10967-014-3264-1

DO - 10.1007/s10967-014-3264-1

M3 - Article

VL - 302

SP - 195

EP - 200

JO - Journal of Radioanalytical and Nuclear Chemistry

JF - Journal of Radioanalytical and Nuclear Chemistry

SN - 0236-5731

IS - 1

ER -

ID: 1401268