Effects of hydrogen atmosphere on mechanical properties and surface conditions of a reduced activation ferritic steel F82H

AbstractThis article summarizes the results obtained studying the interaction between polonium and stainless steel 316L in different atmospheres by the thermochromatography method. This issue is particularly important in terms of licensing of the MYRRHA prototype ADS reactor, where highly radiotoxic α-emitting polonium isotopes are produced in lead-bismuth eutectic used as both spallation target material and coolant, while stainless steel 316L is going to be the main structural material. The polonium adsorption enthalpy on stainless steel 316L in inert atmosphere was measured as −147±6 kJ mol−1. The findings obtained using reducing atmospheres show that the affinity of polonium for stainless steel 316L increases with the metallic character of the stainless steel surface. The presence of moisture in inert and reducing atmosphere does not significantly influence the polonium adsorption. Oxidizing atmospheres induce the formation of polonium dioxide which has a stronger interaction with the stainless steel 316L, with an adsorption enthalpy of −225±6 kJ mol−1. A prolonged exposure of the stainless steel to strong oxidants, such as pure oxygen, reduces the metallic character of the stainless steel surface and, consequently, its affinity to the polonium oxide. Furthermore, it was found that in all experiments at least 5 ppm of the total polonium present in the starting material were not retained on the stainless steel 316L surface at all.

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“…Indeed, hydrogen, used as carrier gas, can modify the SS316L surface, see e. g. Ref. [20]. Considering that the column of Exp.…”

Section: Thermochromatography Studies With Hydrogen As Carrier Gasmentioning

confidence: 99%

Adsorption of volatile polonium species on metals in various gas atmospheres: Part III – Adsorption of volatile polonium on stainless steel 316L

et al. 2017

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Utilization of Refractory Metals and Alloys in Fusion Reactor Structures

Übeylı

Yalçın

2006

J Fusion Energ

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Experimental investigation on deuterium effects on the tensile performance of two types of China Reduced Activation Ferritic-Martensitic steels

Wang

Zhu

Xiang

et al. 2018

Fusion Engineering and Design

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Effects of hydrogen atmosphere on mechanical properties and surface conditions of a reduced activation ferritic steel F82H

Cited by 7 publications

References 3 publications

Adsorption of volatile polonium species on metals in various gas atmospheres: Part III – Adsorption of volatile polonium on stainless steel 316L

Adsorption of volatile polonium species on metals in various gas atmospheres: Part III – Adsorption of volatile polonium on stainless steel 316L

Utilization of Refractory Metals and Alloys in Fusion Reactor Structures

Experimental investigation on deuterium effects on the tensile performance of two types of China Reduced Activation Ferritic-Martensitic steels

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