Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres: Part I – Adsorption of volatile polonium and bismuth on gold

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Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : Part I – Adsorption of volatile polonium and bismuth on gold. / Maugeri, Emilio Andrea; Neuhausen, Jörg; Eichler, Robert; Dressler, Rugard; Rijpstra, Kim; Cottenier, , Stefaan; Piguet, David; Vögele, Alexander; Schumann, Dorothea; Aerts, Alexander.

In: Radiochimica Acta, 13.05.2016.

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Maugeri, Emilio Andrea ; Neuhausen, Jörg ; Eichler, Robert ; Dressler, Rugard ; Rijpstra, Kim ; Cottenier, , Stefaan ; Piguet, David ; Vögele, Alexander ; Schumann, Dorothea ; Aerts, Alexander. / Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres : Part I – Adsorption of volatile polonium and bismuth on gold. In: Radiochimica Acta. 2016.

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@article{1d1990b6ee404f6fa1f4c0c4be01004c,
title = "Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres: Part I – Adsorption of volatile polonium and bismuth on gold",
abstract = "Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead–bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as –250 ± 7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.",
keywords = "Polonium, thermochromatography, ADS, MYRRHA",
author = "Maugeri, {Emilio Andrea} and J{\"o}rg Neuhausen and Robert Eichler and Rugard Dressler and Kim Rijpstra and Stefaan Cottenier, and David Piguet and Alexander V{\"o}gele and Dorothea Schumann and Alexander Aerts",
note = "Score=10",
year = "2016",
month = "5",
day = "13",
doi = "10.1515/ract-2016-2573",
language = "English",
journal = "Radiochimica Acta",
issn = "0033-8230",
publisher = "R. Oldenbourg",

}

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TY - JOUR

T1 - Adsorption of volatile polonium and bismuth species on metals in various gas atmospheres

T2 - Part I – Adsorption of volatile polonium and bismuth on gold

AU - Maugeri, Emilio Andrea

AU - Neuhausen, Jörg

AU - Eichler, Robert

AU - Dressler, Rugard

AU - Rijpstra, Kim

AU - Cottenier, , Stefaan

AU - Piguet, David

AU - Vögele, Alexander

AU - Schumann, Dorothea

AU - Aerts, Alexander

N1 - Score=10

PY - 2016/5/13

Y1 - 2016/5/13

N2 - Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead–bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as –250 ± 7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.

AB - Polonium isotopes are considered the most hazardous radionuclides produced during the operation of accelerator driven systems (ADS) when lead–bismuth eutectic (LBE) is used as the reactor coolant and as the spallation target material. In this work the use of gold surfaces for capturing polonium from the cover gas of the ADS reactor was studied by thermochromatography. The results show that gaseous monoatomic polonium, formed in dry hydrogen, is adsorbed on gold at 1058 K. Its adsorption enthalpy was calculated as –250 ± 7 kJ mol−1, using a Monte Carlo simulation code. Highly volatile polonium species that were observed in similar experiments in fused silica columns in the presence of moisture in both inert and reducing gas were not detected in the experiments studying adsorption on gold surfaces. PoO2 is formed in both dry and moist oxygen, and its interaction with gold is characterized by transport reactions. The interaction of bismuth, present in large amounts in the atmosphere of the ADS, with gold was also evaluated. It was found that bismuth has a higher affinity for gold, compared to polonium, in an inert, reducing, and oxidizing atmosphere. This fact must be considered when using gold as a material for filtering polonium in the cover gas of ADS.

KW - Polonium

KW - thermochromatography

KW - ADS

KW - MYRRHA

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/19811367

U2 - 10.1515/ract-2016-2573

DO - 10.1515/ract-2016-2573

M3 - Article

JO - Radiochimica Acta

JF - Radiochimica Acta

SN - 0033-8230

ER -

ID: 1497692