Electrochemistry of thorium fluoride in LiCl-KCl eutectic melts and methodology for speciation studies with fluorides ions

被引：25

作者：

Delpech, Sylvie ^{[1
]}

Jaskierowicz, Sebastien ^{[1
]}

Rodrigues, Davide ^{[1
]}

机构：

[1] Univ Paris 11, Inst Phys Nucl, UMR 8608, Grp Radiochim, F-91406 Orsay, France

来源：

ELECTROCHIMICA ACTA | 2014年 / 144卷

关键词：

Chloride molten salt; Thorium speciation; Electrochemical behavior; Molten Salt Reactor; MOLTEN-SALT REACTOR; SYSTEM;

D O I：

10.1016/j.electacta.2014.07.096

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This paper reports the electrochemical behavior of ThF4 in LiCl-KCl molten salt. It proposes a potentiometric method to determine the complexation constants of thorium (IV) with fluorides. The knowledge of these constants leads to calculate the speciation diagram of Th(IV) species as a function of the concentration of fluoride ions in the salt. These results were extrapolate to give an estimation of the activity coefficient of ThF4 in the molten salt LiF-ThF4 (77.5-22.5 mol%). This salt is retained for the molten salt fast reactor system, currently studied as a Generation IV concept in the domain of nuclear energy. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：383 / 390

页数：8

共 24 条

[1]

Bermejo Fradejas R., 2003, THESIS U VALLADOLID

[2] OSCILLOGRAPHIC POLAROGRAPHIC WAVES FOR THE REVERSIBLE DEPOSITION OF METALS ON SOLID ELECTRODES [J].

BERZINS, T ;

DELAHAY, P .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1953, 75 (03) :555-559

[3] Lanthanide and actinide speciation in molten fluorides: A structural approach by NMR and EXAFS spectroscopies [J].

Bessada, Catherine ;

Rakhmatullin, Aydar ;

Rollet, Anne-Laure ;

Zanghi, Didier .

JOURNAL OF NUCLEAR MATERIALS, 2007, 360 (01) :43-48

[4]

Brad AJ., 2000, Electrochemical Methods: Fundamentals and Applications

[5] Thermodynamic investigation of the LiF-ThF4 system [J].

Capelli, E. ;

Benes, O. ;

Beilmann, M. ;

Konings, R. J. M. .

JOURNAL OF CHEMICAL THERMODYNAMICS, 2013, 58 :110-116

[6] Electrochemistry of thorium in LiCl-KCl eutectic melts [J].

Cassayre, L. ;

Serp, J. ;

Soucek, P. ;

Malmbeck, R. ;

Rebizant, J. ;

Glatz, J.-P. .

ELECTROCHIMICA ACTA, 2007, 52 (26) :7432-7437

[7] Reactor physic and reprocessing scheme for innovative molten salt reactor system [J].

Delpech, S. ;

Merle-Lucotte, E. ;

Heuer, D. ;

Allibert, M. ;

Ghetta, V. ;

Le-Brun, C. ;

Doligez, X. ;

Picard, G. .

JOURNAL OF FLUORINE CHEMISTRY, 2009, 130 (01) :11-17

[8] Possible routes for pyrochemical separation: Focus on the reductive extraction in fluoride media [J].

Delpech, Sylvie .

PURE AND APPLIED CHEMISTRY, 2013, 85 (01) :71-87

[9] Molten fluorides for nuclear applications [J].

Delpech, Sylvie ;

Cabet, Celine ;

Slima, Cyrine ;

Picard, Gerard S. .

MATERIALS TODAY, 2010, 13 (12) :34-41

[10]

Ferry D., 1985, THESIS U P M CURIE P

← 1 2 3 →