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Special Section on Research Center Řež: Nuclear-Engineering Activities in 2018

Corrosion Experiments on Ceramic Samples Within Molten Salts

[+] Author and Article Information
Jan Hadrava

Department of Nuclear Fuel Cycle,
Research Centre Řež,
Hlavní 130,
Husinec-Řež CZ 250 68, Czech Republic
e-mail: jan.hadrava@cvrez.cz

Vojtěch Galek

Department of Nuclear Fuel Cycle,
Research Centre Řež,
Hlavní 130,
Husinec-Řež CZ 250 68, Czech Republic
e-mail: vojtech.galek@cvrez.cz

Jaroslav Stoklasa

Department of Nuclear Fuel Cycle,
Research Centre Řež,
Hlavní 130,
Husinec-Řež CZ 250 68, Czech Republic
e-mail: jaroslav.stoklasa@cvrez.cz

Jan Hrbek

Department of Nuclear Fuel Cycle,
Research Centre Řež,
Hlavní 130,
Husinec-Řež CZ 250 68, Czech Republic
e-mail: jan.hrbek@cvrez.cz

Kateřina Kunešová

Department of Chemistry,
Nuclear Power Plant Dukovany,
ČEZ a.s, Duhová 1444/2,
Prague 4, Czech Republic
e-mail: katerina.kunes@gmail.com

Petr Bezdička

Institute of Inorganic Chemistry,
Czech Academy of Sciences,
PN 1001, Hlavní 130,
Husinec-Řež CZ 250 68, Czech Republic
e-mail: petrb@iic.cas.cz

Ivona Sedlářová

Department of Inorganic Technology,
Faculty of Chemical Technology,
University of Chemistry and Technology Prague,
Technická 5,
Prague 6 166 28, CZ, Czech Republic
e-mail: ivona.sedlarova@vscht.cz

1Corresponding author.

Manuscript received July 31, 2018; final manuscript received March 1, 2019; published online April 19, 2019. Assoc. Editor: Martin Schulc.

ASME J of Nuclear Rad Sci 5(3), 030910 (Apr 19, 2019) (7 pages) Paper No: NERS-18-1059; doi: 10.1115/1.4043097 History: Received July 31, 2018; Revised March 01, 2019

The molten salts can provide many possibilities for their use, e.g., an electrolyte in fuel cells or as a heat transfer medium and an oxygen transporter for flameless oxidation in molten salt oxidation (MSO) technology. The environment of molten salts is very corrosive; therefore, it is crucial to find such ceramic materials, which could be used as reactor filling for MSO technology. The aim of this work was to research physical properties of ceramic samples after the exposure within the eutectic mixture of Na2CO3, K2CO3, Li2CO3 and temperature of 700 °C.

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References

Griffiths, T. R. R. , Volkovich, V. A. , and Carper, W. R. , 2007, “ CEMSO (Catalyst Enhanced Molten Salt Oxidation) for Complete and Continuous Pyrochemical Reprocessing of Spent Nuclear Fuel: An Overview of a Viable New Technology for Next Generation Nuclear Reactors,” ECS Trans., 3(35), pp. 467–482.
Yang, H. C. , Cho, Y. J. , Eun, H. C. , Yoo, J. H. , and Kim, J. H. , 2005, “ Molten Salt Oxidation of Ion-Exchange Resins Doped With Toxic Metals and Radioactive Metal Surrogates,” J. Nucl. Sci. Technol., 42(1), pp. 123–129. [CrossRef]
Yao, Z. , Li, J. , and Zhao, X. , 2011, “ Molten Salt Oxidation: A Versatile and Promising Technology for the Destruction of Organic-Containing Wastes,” Chemosphere, 84(9), pp. 1167–1174. [CrossRef] [PubMed]
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Hadrava, J. , Galek, V. , and Hrbek, J. , 2016, “ Bezplamenné Spalování Radioaktivních a Nebezpečných Odpadů v Tavenině Soli MSO,” Elecroscope, 1(2), pp. 1–5 (in Czech).
Stoklasa, I. J. , Pražák, P. , Lucie, I. , and Nenadálová, K. , 2016, “ Dílčí Procedury, Chování a Charakter Komponent Během Procesu Oxidačního Spalování v Roztavené Soli,” TVIP, Hustopeče, Czech Republic, Mar. 15–18, 2017, pp. 1–7 (in Czech).
Yang, H. C. , Lee, M. W. , Yoon, I. H. , Chung, D. Y. , and Moon, J. K. , 2013, “ Scale-Up and Optimization of a Two-Stage Molten Salt Oxidation Reactor System for the Treatment of Cation Exchange Resins,” Chem. Eng. Res. Des., 91(4), pp. 703–712. [CrossRef]
Stoklasa, J. , Galek, V. , Pražák, P. , Karásková Nenadálová, L. , and Kůs, P. , 2016, “ Zneškodňování Radioaktivně Kontaminovaných Iontoměničů Oxidací v Tavenině Soli,” Report from Work for Grant Agency of the Czech Republic (in Czech).
Galek, V. , Stoklasa, J. , and Pražák, P. , 2017, “ Technologie MSO: Ekologická Možnost Likvidace Odpad ů s Vysokou Korozní Rychlostí Materiál ů,” TVIP, Hustopeče, Czech Republic, Mar. 21–23, pp. 1–7 (in Czech).
ICDD, 2018, “ JCPDS PDF-4 Database,” International Centre for Diffraction Data, Newtown Square, PA.
Doebelin, N. , and Kleeberg, R. , 2015, “ Profex: A Graphical User Interface for the Rietveld Refinement Program BGMN,” J. Appl. Crystallogr., 48(5), pp. 1573–1580. [CrossRef] [PubMed]
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Figures

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Fig. 1

The scheme of double-stage MSO apparatus

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Fig. 2

Dependence of mass gain of ceramic samples in the frame of time

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Fig. 3

Dependence of effective porosity of ceramic samples in the frame of time

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Fig. 4

Dependence of mercury porosity of ceramic samples in the frame of time

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Fig. 5

Plot of mercury porosity analysis with pore radius of ZrSiO4

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Fig. 6

Plot of mercury porosity analysis with pore radius of Eucor type 1

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Fig. 7

Plot of mercury porosity analysis with pore radius of Eucor type 2

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Fig. 8

Comparison of XRD analysis of the ZrSiO4 sample before exposure and after 4 h in the molten salt

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Fig. 9

Comparison of XRD analysis of the Eucor type 1 sample before exposure and after 4 h in the molten salt

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Fig. 10

Comparison of XRD analysis of the Eucor type 2 sample before exposure and after 4 h in the molten salt

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