Studies on the dissolution behaviour of ThO2 and (U,Th)O2 by a solid state reaction method

被引：8

作者：

Chaudhury, Satyajeet ^{[1
]}

Keskar, Meera ^{[1
]}

Patil, Abhay V. ^{[1
]}

Mudher, K. D. Singh ^{[1
]}

Venugopal, V. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Fuel Chem, Bombay 400085, Maharashtra, India

来源：

RADIOCHIMICA ACTA | 2006年 / 94卷 / 6-7期

关键词：

sintered; X-ray diffraction; thermal analysis; thoria; mixed oxide;

D O I：

10.1524/ract.2006.94.6.357

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A simple and fast method for the dissolution of sintered ThO2 and (U,Th)O-2 was developed. The products formed when these oxides were fused with ammonium sulphate at various temperatures were found to be readily soluble in dilute nitric acid. Among all the products obtained at various temperatures, (NH4)(2)Th(SO4)(3) and (NH4)(2)(Ux,Th1-x)(SO4)(3), obtained at 365 degrees C, were found highly soluble (> 99%). After dissolution thorium was separated selectively by oxalate precipitation method. More than 95% of uranium was recovered from the solution by ammonium diuranate precipitation method. The products formed at different temperatures were characterised by X-ray, thermal and chemical analysis techniques.

引用

页码：357 / 361

页数：5

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