THE CHEMICAL-STATE OF FISSION-PRODUCTS IN OXIDE FUELS AT DIFFERENT STAGES OF THE NUCLEAR-FUEL CYCLE

被引：117

作者：

KLEYKAMP, H

机构：

[1] Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, West Ger, Kernforschungszentrum Karlsruhe GmbH, Karlsruhe, West Ger

来源：

NUCLEAR TECHNOLOGY | 1988年 / 80卷 / 03期

关键词：

NUCLEAR FUELS - Reprocessing - RADIATION EFFECTS - RADIOACTIVE WASTES;

D O I：

10.13182/NT88-A34065

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 survey of work at the Kernforschungszentrum Karlsruhe is presented on the chemical state of selected fission products that are relevant in the fuel cycle of light water reactor (LWR) and fast breeder reactor fuels. The influence of fuel type and irradiation progress on the composition of the Mo-Tc-Ru-Rh-Pd fission product alloys precipitated in the oxide matrix is examined using the respective multicomponent phase diagrams. The kinetics of dissolution of these phases in nitric acid at the reprocessing stage is discussed. Composition and structure of the residues, and the reprecipitation phenomena from highly active waste (HAW), are elucidated. A second metamorphosis of the fission products is recognized during the vitrification process. The formation of Ru(Rh) oxide and Pd(Rh,U,Te) alloys in simulated vitrified HAW concentrate and in HAW concentrate from the reprocessing of irradiated LWR fuels is interpreted on the basis of heterogeneous equilibria.

引用

页码：412 / 422

页数：11

共 13 条

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