Development of processes for pilot plant production of purified uranyl nitrate solutions

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dc.contributor.authorAlfredson, PGen_AU
dc.contributor.authorCharlton, BGen_AU
dc.contributor.authorRyan, RKen_AU
dc.contributor.authorVilkaitis, VKen_AU
dc.date.accessioned2007-11-22T04:24:34Zen_AU
dc.date.accessioned2010-04-30T04:36:27Zen_AU
dc.date.available2007-11-22T04:24:34Zen_AU
dc.date.available2010-04-30T04:36:27Zen_AU
dc.date.issued1975-01en_AU
dc.description.abstractNuclear purity uranyl nitrate solutions were produced from Rum Jungle yellow cake by dissolution in nitric acid and purification by solvent extraction with 20 vol.% tributyl phosphate in kerosene using pump -mix mixer-settler contactors. The design of the equipment, experimental studies and operating experience are described. Dissolution of yellow cake and recycled uranium oxide materials was readily carried out in a 100 ℓ dissolver to give solutions containing 300 gU ℓ -1 and 0.5 to 4 П nitric acid. Filtration of silica from this solution prior to solvent extraction was not necessary in this work for yellow cake containing 0.25 per cent silica. A low acid flowsheet for uranium purification was developed in which the nitric acid consumption was reduced by 76 per cent and the throughput of the mixer-settler units was increased by 67 per cent compared with the initial design flowsheet. Nine extraction and seven scrubbing stages were used with a feed solution containing 300 gU ℓ -1 and 1.0 П nitric acid and with a portion of the product recycled as scrub solution. The loaded organic phase was stripped in 16 stages with 0.05 П nitric acid heated to 60º C to give a 120 gU ℓ -1 product. The uranium concentration in the raffinate was < 0.04 g ℓ-1, corresponding to ~ 0.01 per cent of the feed.en_AU
dc.identifier.citationAlfredson, P. (1975). Development of processes for pilot plant production of purified uranyl nitrate solutions (AAEC/E344). Lucas Heights, N.S.W.: Australian Atomic Energy Commission, Research Establishment.en_AU
dc.identifier.govdoc560en_AU
dc.identifier.isbn0642996725en_AU
dc.identifier.otherAAEC-E-344en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/550en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectUranium dioxideen_AU
dc.subjectSolvent extractionen_AU
dc.subjectPurificationen_AU
dc.subjectUranyl nitratesen_AU
dc.subjectNitric aciden_AU
dc.titleDevelopment of processes for pilot plant production of purified uranyl nitrate solutionsen_AU
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