Solubility of lanthanide fluorides in nitric acid solution in the dissolution process of FLUOREX reprocessing system

被引：30

作者：

Amano, O

Sasahira, A ^{[1
]}

Kani, Y

Hoshino, K

Aoi, M

Kawamura, F

机构：

[1] Hitachi Ltd, Power & Ind Syst R&D Lab, Hitachi, Ibaraki 3191221, Japan

[2] Tokyo Elect Power Co Ltd, Nucl Power R&D Ctr, Tsurumi Ku, Yokohama, Kanagawa 2308510, Japan

[3] Hitachi Ltd, Nucl Syst Div, Hitachi, Ibaraki 3178511, Japan

来源：

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2004年 / 41卷 / 01期

关键词：

spent fuel reprocessing; FLUOREX; dissolution; nitric acid; lanthanide fluorides; solubility products; fluoride ion; plutonium tetrafluoride;

D O I：

10.3327/jnst.41.55

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A new reprocessing technology, FLUOREX, is proposed for the thermal reactor cycle. In the dissolution process of FLUOREX, it needs to estimate the concentration of fluoride ion in the solution to avoid formation of insoluble plutonium precipitate. We measured the solubility products of lanthanide fluorides, LaF3, CeF3, and NdF3 in nitric acid solution and evaluate the concentration of fluoride ion in the dissolution process. Solubilities were measured by both of dissolution method and precipitation method. The solubility products are about 10(1) to 10(2) times larger than those in water. This largeness may be caused by higher ionic strength of nitric acid solution. The newly obtained solubility products for the lanthanides are useful to calculate the maximum concentration of plutonium ions in the FLUOREX dissolution process, although the further study for the solubility products for plutonium tetrafluoride is needed in the nitric acid solution.

引用

页码：55 / 60

页数：6

共 8 条

[1]

ADACHI G, 1999, KIDORUI NO KAGAKU SC

[2]

AMANO O, 2001, P ACT 2001 HAY JAP

[3]

AMANO O, 2002, P 5 TOP M SPENT FUEL

[4]

AMANO O, 2001, P GLOBAL 2001 PAR FR

[5]

Freiser H., 1963, IONIC EQUILIBRIA ANA

[6]

Katz J. J., 1986, CHEM ACTINIDE ELEMEN, V1

[7]

1981, BUNSEKI KAGAKU BINNR, P187

[8]

1984, KAGAKU BINNRAN

← 1 →