Radiochemical stability of dicyclohexano-18-crown-6 ether (DCH18C6) and its use in a recovery process of strontium from acidic nuclear waste stream

M. Draye , A. Favre Reguillon , J. Foos , A. Guy (1) , M. Lemaire (1)

1 IRC - Institut de recherches sur la catalyse

The cis-syn-cis isomer of the dicyclohexano-18-crown-6 ether (DCH18C6) was subjected to radiolysis with a 1 3 7Cs y-source. The cis-syn-cis DCH18C6 radiolytic products were synthesized in their difgerent confjgurations and tested on aqueous synthetic solutions of spent nuclear fuels: no influence of the degradation products was detected. So, gopd prospects fpr the application of DCH18C6 to the spent nuclear fvels reprodessing as well as liquid effmuents treatment was demonstsated . Thus, a process combining selective liquid-liquid extraction (DCH18C8-CHC13) with solid-liquid extraction (Duolite ARC-9652) fpr strontium traces removal fsom acidic waste streams is described . This pro­cess allows to a high strontium decontamination fbctor (250) with a very important extsaction factor [1] (5010 ) in the presence of 3 0 · 10 3 molar excess of sodium

Domaines: Catalyse

M. Draye, A. Favre Reguillon, J. Foos, A. Guy, M. Lemaire. Radiochemical stability of dicyclohexano-18-crown-6 ether (DCH18C6) and its use in a recovery process of strontium from acidic nuclear waste stream. Radiochimica Acta, 1997, 78, pp.105-109. ⟨10.1524/ract.1997.78.special-issue.105⟩. ⟨hal-00006669⟩