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ANSTO Publications Online >
ANSTO Publications >
Scientific and Technical Reports >
Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/550
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| Title: | Development of processes for pilot plant production of purified uranyl nitrate solutions. |
| Authors: | Alfredson, PG Charlton, BG Ryan, RK Vilkaitis, VK |
| Issue Date: | Jan-1975 |
| Publisher: | Australian Nuclear Science and Technology Organisation |
| Abstract: | Nuclear 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. |
| URI: | http://apo.ansto.gov.au/dspace/handle/10238/550 |
| ISBN: | 0642996725 |
| Appears in Collections: | Scientific and Technical Reports |
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