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

2016 ◽  
Vol 104 (11) ◽  
Author(s):  
Emilio Andrea Maugeri ◽  
Jörg Neuhausen ◽  
Robert Eichler ◽  
Rugard Dressler ◽  
Kim Rijpstra ◽  
...  
Keyword(s):  
Target Material ◽  
Gold Surfaces ◽  
Adsorption Enthalpy ◽  
Spallation Target ◽  
Driven Systems ◽  
Reactor Coolant ◽  
Lead Bismuth Eutectic ◽  
Accelerator Driven Systems

AbstractPolonium 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

scholarly journals Use of the transpiration method to study polonium evaporation from liquid lead-bismuth eutectic at high temperature

2014 ◽  
Vol 102 (12) ◽  
Author(s):  
Borja Gonzalez Prieto ◽  
Alessandro Marino ◽  
Jun Lim ◽  
Kris Rosseel ◽  
Johan Martens ◽  
...  
Keyword(s):  
Liquid Lead ◽  
Driven Systems ◽  
Qualitative And Quantitative ◽  
Transpiration Method ◽  
Equilibrium And Kinetics ◽  
Quantitative Understanding ◽  
Safety Assessments ◽  
Lead Bismuth Eutectic ◽  
Accelerator Driven Systems ◽  
Kinetics Of

AbstractQualitative and quantitative understanding of Po volatilization under different conditions is of key importance for safety assessments of lead-bismuth eutectic (LBE) based nuclear reactors, spallation targets and accelerator driven systems. In this work we explore the possibilities of the transpiration method in combination with simple models to study the equilibrium and kinetics of Po evaporation from highly diluted solutions in lead-bismuth eutectic between 600 and 1000 ℃ in Ar/5% H

Vacuum Interface Analysis of a Windowless Spallation Target for Accelerator-Driven Systems

2007 ◽  
Vol 157 (1) ◽  
pp. 95-109 ◽  
Author(s):  
P. Michelato ◽  
E. Cavaliere ◽  
C. Pagani ◽  
E. Bari ◽  
A. Bonucci
Keyword(s):  
Spallation Target ◽  
Driven Systems ◽  
Interface Analysis ◽  
Vacuum Interface ◽  
Accelerator Driven Systems

scholarly journals Adsorption of volatile polonium species on metals in various gas atmospheres: Part II – Adsorption of volatile polonium on platinum, silver and palladium

2016 ◽  
Vol 104 (11) ◽  
Author(s):  
Emilio Andrea Maugeri ◽  
Jörg Neuhausen ◽  
Ryszard Misiak ◽  
Robert Eichler ◽  
Rugard Dressler ◽  
...  
Keyword(s):  
Inert Atmosphere ◽  
Crucial Importance ◽  
Nuclear Facilities ◽  
Driven Systems ◽  
Lead Bismuth Eutectic ◽  
Accelerator Driven Systems ◽  
Silver Surfaces

AbstractThis work presents the results obtained from studying the interaction between polonium compounds formed in different atmospheres and platinum, palladium and silver surfaces obtained by thermochromatography. These results are of crucial importance for the design of cover gas filter systems for lead-bismuth eutectic (LBE)-based nuclear facilities such as accelerator driven systems (ADS). The results obtained from studying the interaction of polonium and platinum under inert atmosphere and reducing atmospheres with and without addition of moisture show that polonium is deposited at temperatures between 993 and 1221 K, with adsorption enthalpies ranging from –235 to –291 kJ mol

Thermal-hydraulic analysis of LBE spallation target for accelerator-driven systems

Pramana ◽  
2013 ◽  
Vol 80 (1) ◽  
pp. 89-103
Author(s):  
ANISEH AHMED ATEF ABDALLA ◽  
JIYANG YU ◽  
YONGWEI YANG
Keyword(s):  
Hydraulic Analysis ◽  
Spallation Target ◽  
Driven Systems ◽  
Accelerator Driven Systems ◽  
Thermal Hydraulic Analysis
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