Solubility and precipitation investigations of UO2 in LiF-BeF2 molten salt
文献类型：期刊论文
| 作者 | Peng, H; Huang, W; Xie, LD; Li, QN |
| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2020 |
| 卷号 | 531页码:- |
| 关键词 | LIF-NAF-KF ELECTROCHEMICAL SEPARATION URANIUM THERMODYNAMICS ADSORPTION REDUCTION FLUORIDES CHEMISTRY REACTORS THORIUM |
| ISSN号 | 0022-3115 |
| DOI | 10.1016/j.jnucmat.2020.152004 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The solubility of UO2 in molten LiF-BeF2 (2:1 mol) (FLiBe) eutectic salt at 600 degrees C was studied by chemical and electrochemical methods. The results of dissolution experiment showed that the saturated solubility of UO2 in this melt was 2.37 x 10(-3) mol/kg and its corresponding apparent solubility product (K'(sp)) was approximately 1.67 x 10(-5) mol(3)/kg(3). When more Li2O were added to the FLiBe-UF4 system, the cathodic peak current of U(IV) in the electrochemical cyclic voltammetry (CV) curve accordingly decreased because of precipitate formation. The precipitate corresponded to UO2 as determined by stoichiometric ratio (concentration variation of U4+ and O2-) and X-ray diffraction (XRD) analysis. Compared to the chemical analysis method, the CV technique was confirmed to be more feasible for accurate determination of concentration of U(IV). Meanwhile, the K'(sp) value was also obtained to be 1.33 x 10(-5) mol(3)/kg(3) during the whole oxide titration procedure, which was highly consistent with that from the dissolution experiment. With the value of K'(sp), the allowable amount of dissolved oxide ions (oxide tolerance) can be theoretically estimated in the FLiBe-UF4 system. (C) 2020 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33144]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, H,Huang, W,Xie, LD,et al. Solubility and precipitation investigations of UO2 in LiF-BeF2 molten salt[J]. JOURNAL OF NUCLEAR MATERIALS,2020,531:-. |
| APA | Peng, H,Huang, W,Xie, LD,&Li, QN.(2020).Solubility and precipitation investigations of UO2 in LiF-BeF2 molten salt.JOURNAL OF NUCLEAR MATERIALS,531,-. |
| MLA | Peng, H,et al."Solubility and precipitation investigations of UO2 in LiF-BeF2 molten salt".JOURNAL OF NUCLEAR MATERIALS 531(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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