Chemical analysis used in nuclear fuels reprocessing of uranium and thorium
Description
An overall review of the analytical chemistry in nuclear fuel reprocessing is done. In Purex and Thorex process flowsheets, the analyses required to the control of the process, balance and accountability of fissile and fertile materials, and final product specification are pointed out. Some analytical methods applied to the determination of uranium, plutonium, thorium, nitric acid, tributylphosphate and fission products are described. Specific features of the analytical laboratories are presented. The radioactivity level of the samples requires facilities as shielded cells and glove boxes, and handling by remote control. Finally it is reported an application of one analytical method to evaluate thorium content in organic and aqueous solutions, in cold tests of Thorex process. These tests were performed at CDTN/NUCLEBRAS. (author)
Abstract (Portuguese)
Apresenta-se uma visao geral da quimica analitica do reprocessamento quimico do combustivel nuclear irradiado. Localizaram-se nos fluxogramas dos processos Purex e Thorex as analises requeridas para o controle do processo, para o balanco e contabilidade do material fissil e fertil, e para a especificacao dos produtos finais. Apresentam-se alguns metodos analiticos usados para uranio, plutonio, torio, acidez livre, fosfato de tributila (TBP) e produtos de fissao. Descrevem-se os tipos de instalacoes em que e realizado o reprocessamento e os dispositivos necessarios aos laboratorios analiticos. O nivel de atividade das amostras requer instalacoes como celulas blindadas e caixas de luvas, bem como manuseio por controle remoto. Finalmente apresenta-se uma aplicacao pratica de controle do processo. Fez-se a medida da concentracao de torio em correntes aquosas e organicas, no decorrer de testes a frio do processo Thorex, realizados na Divisao de Reprocessamento do CDTN/NUCLEBRAS. (autor)Files
19071477.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Analises quimicas envolvidas no reprocessamento de combustiveis nucleares de uranio e torio
Publishing Information
- Imprint Pagination
- 182 p.
- Report number
- NUCLEBRAS/CDTN--563
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 19071477
- Subject category
- S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CHEMICAL ANALYSIS; FLOWSHEETS; PERFORMANCE; REPROCESSING; THORIUM; URANIUM
- Descriptors DEC
- ACTINIDES; DIAGRAMS; ELEMENTS; INFORMATION; METALS; SEPARATION PROCESSES