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PUREX-DIAMEX-SANEX process

Di(2-ethylhexyl) phosphoric acid (HDEHP) is an extractant molecule used for An(III)/Ln(III) separation. Used in TALSPEAK-type processes in a mixture with TBP, or in the DIAMEX-SANEX process in a mixture with a malonamide (154-157), it has also been proposed, in a mixture with TBP, to remove strontium from PUREX acid waste solution in the Hanford B plant (158). Therefore, numerous studies have focussed on the radiolytic degradation of HDEHP and its effects on the extraction of Sr(II), lanthanides(III), and actinides(III) (10, 158-163). [Pg.452]

In France, the DIAMEX/SANEX processes (Figure 14.26), studied at the Commissariat a I Energie Atomique (CEA) Marcoule, aims at recovering MA selectively from PUREX raffinate. [Pg.437]

The DIAMEX-SANEX/HDEHP process is probably the only single-step process that enables a complete selective An(III)/Ln(III) partitioning from non-pretreated PUREX raffinates (245). It combines two organic molecules possessing opposite but complementary extracting mechanisms ... [Pg.170]

FIGURE 3.26 DIAMEX-SANEX/HDEHP process flowsheet tested at the CEA Marcoule on a genuine PUREX raffinate. (Courtesy of Madic, C., Lecomte, M., Baron, P., Boullis, B., Compte-Rendu de Physique, 3, 797-811, 2002.)... [Pg.171]

The flowsheet of the UREX process, developed in the United States, includes the following extraction cycles (1) separation of uranium and technetium, (2) separation of plutonium, (3) separation of cesium and strontium, (4) separation of MAs and Rare Earth Elements (REE), and (5) group separation of MA from REE metals.9,10 Flowsheet development in Europe11 includes a modified PUREX process and, after that, the DIAMEX process for separation of MAs and lanthanides, the SANEX process for separation of MAs from lanthanides, and a special cycle for Am/Cm separation. Cesium and strontium will be in the raffinate of the DIAMEX process, and this raffinate will be vitrified, or cesium can be preliminarily extracted.12... [Pg.360]

The Selective ActiNide Extraction (SANEX) process has been developed by Madic and Hill (Hill et al., 2002, 17-21 Madic et al., 2002). As part of the management of minor actinides, it has been proposed that the lanthanides and trivalent minor actinides (Am and Cm) should be removed from the PUREX raffinate by a process such as DIAMEX in France or TRUEX in the USA. To allow the actinides such as americium to be reused in industrial sources or used as fuel, the lanthanides must be removed. The lanthanides have large neutron cross sections and hence they would poison a neutron-driven nuclear reaction. [Pg.439]


See other pages where PUREX-DIAMEX-SANEX process is mentioned: [Pg.443]    [Pg.443]    [Pg.122]    [Pg.124]   
See also in sourсe #XX -- [ Pg.443 ]




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SANEX

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