Electrochemistry in molten LiF-BeF2 salt for fluoride salt-cooled high temperature reactor applications

W. H. Doniger; T. Chrobak; B. Kelleher; K. Dolan; G. Cao; M. Anderson; K. Sridharan

doi:10.1007/978-3-319-51493-2_59

Electrochemistry in molten LiF-BeF₂ salt for fluoride salt-cooled high temperature reactor applications

W. H. Doniger, T. Chrobak, B. Kelleher, K. Dolan, G. Cao, M. Anderson, K. Sridharan

Nuclear Science & Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A dynamic beryllium reference electrode has been developed for in situ electrochemistry studies of molten LiF-BeF₂ (66-34 mol%) (FLiBe) salt which is being considered as the primary coolant for the fluoride salt-cooled high temperature reactor (FHR). Measurement and control of the salt redox potential can mitigate corrosion which is an important challenge in high temperature molten fluoride salts. This three electrode probe has demonstrated good reproducibility in the measurement of the salt’s redox potential with an error of ±4 mV at 500 °C. The response of the probe to changes in salt chemistry was investigated by the intentional additions of fluorides of nickel, iron, and chromium, which are corrosion products of common structural materials. The equilibrium potentials of these metal impurity fluorides were measured in solutions containing approximately 250 ppm of each impurity using cyclic voltammetry. This approach is being extended to study electrochemical purification of molten FLiBe.

Original language	English
Title of host publication	TMS 2017 146th Annual Meeting
Publisher	Springer International Publishing
Pages	617-628
Number of pages	12
ISBN (Print)	9783319514925
DOIs	https://doi.org/10.1007/978-3-319-51493-2_59
State	Published - 2017
Event	146th Annual Meeting and Exhibition Supplemental, TMS 2017 - San Diego, United States Duration: Feb 26 2017 → Mar 2 2017

Publication series

Name	Minerals, Metals and Materials Series
Volume	Part F6
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	146th Annual Meeting and Exhibition Supplemental, TMS 2017
Country/Territory	United States
City	San Diego
Period	02/26/17 → 03/2/17

Keywords

Dynamic reference electrode
Electrochemistry
FLiBe
Molten fluoride salt
Redox potential

Access to Document

10.1007/978-3-319-51493-2_59

Cite this

Doniger, W. H., Chrobak, T., Kelleher, B., Dolan, K., Cao, G., Anderson, M., & Sridharan, K. (2017). Electrochemistry in molten LiF-BeF₂ salt for fluoride salt-cooled high temperature reactor applications. In TMS 2017 146th Annual Meeting (pp. 617-628). (Minerals, Metals and Materials Series; Vol. Part F6). Springer International Publishing. https://doi.org/10.1007/978-3-319-51493-2_59

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abstract = "A dynamic beryllium reference electrode has been developed for in situ electrochemistry studies of molten LiF-BeF2 (66-34 mol%) (FLiBe) salt which is being considered as the primary coolant for the fluoride salt-cooled high temperature reactor (FHR). Measurement and control of the salt redox potential can mitigate corrosion which is an important challenge in high temperature molten fluoride salts. This three electrode probe has demonstrated good reproducibility in the measurement of the salt{\textquoteright}s redox potential with an error of ±4 mV at 500 °C. The response of the probe to changes in salt chemistry was investigated by the intentional additions of fluorides of nickel, iron, and chromium, which are corrosion products of common structural materials. The equilibrium potentials of these metal impurity fluorides were measured in solutions containing approximately 250 ppm of each impurity using cyclic voltammetry. This approach is being extended to study electrochemical purification of molten FLiBe.",

keywords = "Dynamic reference electrode, Electrochemistry, FLiBe, Molten fluoride salt, Redox potential",

author = "Doniger, {W. H.} and T. Chrobak and B. Kelleher and K. Dolan and G. Cao and M. Anderson and K. Sridharan",

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Doniger, WH, Chrobak, T, Kelleher, B, Dolan, K, Cao, G, Anderson, M & Sridharan, K 2017, Electrochemistry in molten LiF-BeF₂ salt for fluoride salt-cooled high temperature reactor applications. in TMS 2017 146th Annual Meeting. Minerals, Metals and Materials Series, vol. Part F6, Springer International Publishing, pp. 617-628, 146th Annual Meeting and Exhibition Supplemental, TMS 2017, San Diego, United States, 02/26/17. https://doi.org/10.1007/978-3-319-51493-2_59

Electrochemistry in molten LiF-BeF₂ salt for fluoride salt-cooled high temperature reactor applications. / Doniger, W. H.; Chrobak, T.; Kelleher, B. et al.
TMS 2017 146th Annual Meeting. Springer International Publishing, 2017. p. 617-628 (Minerals, Metals and Materials Series; Vol. Part F6).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Dolan, K.

AU - Cao, G.

AU - Anderson, M.

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N2 - A dynamic beryllium reference electrode has been developed for in situ electrochemistry studies of molten LiF-BeF2 (66-34 mol%) (FLiBe) salt which is being considered as the primary coolant for the fluoride salt-cooled high temperature reactor (FHR). Measurement and control of the salt redox potential can mitigate corrosion which is an important challenge in high temperature molten fluoride salts. This three electrode probe has demonstrated good reproducibility in the measurement of the salt’s redox potential with an error of ±4 mV at 500 °C. The response of the probe to changes in salt chemistry was investigated by the intentional additions of fluorides of nickel, iron, and chromium, which are corrosion products of common structural materials. The equilibrium potentials of these metal impurity fluorides were measured in solutions containing approximately 250 ppm of each impurity using cyclic voltammetry. This approach is being extended to study electrochemical purification of molten FLiBe.

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