Investigation of polonium removal systems for lead-bismuth cooled fbrs

Loewen, Eric P.

doi:10.1016/j.pnucene.2005.05.061

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…With a melting temperature of 180°C this eutectic allows extraction at significantly lower temperatures than was reported in earlier scientific papers. Experimental studies in [15] and later works [16,17] have, however, only used tellurium as a polonium surrogate in LBE. Having similar chemical behaviour, tellurium may serve as a chemical analogue for polonium without emitting hazardous radiation.…”

Section: Introductionmentioning

confidence: 99%

Alkaline extraction of polonium from liquid lead bismuth eutectic

Heinitz¹,

Neuhausen²,

Schumann³

2011

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

Alkaline extraction of polonium from liquid lead bismuth eutectic

Heinitz¹,

Neuhausen²,

Schumann³

2011

Journal of Nuclear Materials

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“…8) Each tellurium concentration data point was converted into the form shown in Eqs. To illustrate the character of the results, the change in tellurium concentration over time and associated one standard deviation of the data from four representative experimental runs are shown in Tables 1-4 below.…”

Section: Resultsmentioning

confidence: 99%

“…8) Briefly, the reaction cell consisted of a 101.6-mm OD and 5.7-mm thick stainless steel pipe with welded flanges. 8) Briefly, the reaction cell consisted of a 101.6-mm OD and 5.7-mm thick stainless steel pipe with welded flanges.…”

Section: Methodsmentioning

confidence: 99%

The Chemical Kinetics of Alkaline Extraction of Tellurium from Lead-Bismuth Eutectic

Auman

Loewen

Gesell

et al. 2005

Journal of Nuclear Science and Technology

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Developing the technology to remove neutron activation products from lead-bismuth eutectic requires understanding the chemical kinetics of the removal reaction. Polonium-210, an important radioactive product caused by neutron activation of lead-bismuth eutectic, poses a radiological hazard if a system breach occurred or system maintenance is performed. Methods to remove 210 Po have been discussed in the literature. One approach under consideration is to develop a system that would chemically remove 210 Po. The removal method under investigation in this research is alkaline extraction.Chemical kinetic measurements were made to determine first and second order rate constants and the activation energy at various temperatures using tellurium as a surrogate. First and second order alkaline extraction rate constants were measured to be: k 1 ¼2:17e À40;483=RT and k 2 ¼8:18e À74;018=RT where R is the ideal gas constant and T is the temperature in degrees Kelvin. Alkaline extraction is dependent on temperature and was found to follow the Arrhenius rate law. The activation energy (E a ) ranged between 40,483-74,018 JÁmol À1 . With a strong foundation of surrogate work completed, this work should be validated using 210 Po.

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“…The thermochemical properties of Po are, however, not sufficiently known to assess its chemical behaviour with a reasonable degree of certainty [22][23][24][25]. Furthermore, there is no such thing as stable Po which could be used to perform measurements or tests.…”

Section: Safety and Designmentioning

confidence: 99%