The production of sinterable uranium dioxide from ammonium diuranate, Part 3 - continuous production in a pulsed fluidised bed reactor

Simple item page
dc.contributor.authorFane, AGen_AU
dc.contributor.authorLe Page, AHen_AU
dc.date.accessioned2007-11-22T04:24:37Zen_AU
dc.date.accessioned2010-04-30T04:36:30Zen_AU
dc.date.available2007-11-22T04:24:37Zen_AU
dc.date.available2010-04-30T04:36:30Zen_AU
dc.date.issued1975-02en_AU
dc.description.abstractThe development of a 0.13 m diameter pulsed fluidised bed reactor for the continuous production of sinterable uranium dioxide from ammonium diuranate is described. Calcination-reduction at 670 to 680 ºC produced powders with surface areas of 4 to 6 m2 g-1 giving pellet densities in excess of 10.6 g cm-3. Sinterability was relatively insensitive to changes in operating conditions, provided the availability of hydrogen was adequate, for gas flow rates in the range 0.95 to 1.4 ℓ s-1, pulse frequencies of 0.5 and 0.75 Hz and mean residence times of the solids from 0.6 to 1.4 hours. Sinterability was shown to be improved either by use of higher input concentrations, or by use of a secondary flow of hydrogen (about 5 per cent of input) fed into the powder collection system and flowing countercurrent to the U02 product. The maximum throughput of 17 kg U02 h-1 (0.6 hours mean residence time) required only 120 per cent of the stoichiometric requirement at an input concentration of 50 vol.% with secondary hydrogen flow. Results are given for studies of the kinetics of reduction of calcined ammonium diuranate in hydrogen and the residence time distribution of solids in a pulsed fluidised bed. Estimates based on these data suggested that the overall conversion of ammonium diuranate to uranium dioxide in the continuously operated pulsed fluidised bed reactor was in excess of 99 per cent. Continuous stabilisation of the U02 product was demonstrated at 12 kg h-1 of U02, in a 0.15 m diameter glass stabiliser, using 10 vol.% air in nitrogen and a temperature of about 50ºC.en_AU
dc.identifier.citationFane, A. G., & Le Page, A. H. (1975). The production of sinterable uranium dioxide from ammonium diuranate : part 3, continuous production in a pulsed fluidised bed reactor (AAEC/E347). Lucas Heights, NSW: Australian Atomic Energy Commission Research Establishment.en_AU
dc.identifier.govdoc563en_AU
dc.identifier.isbn0642996768en_AU
dc.identifier.otherAAEC-E-347en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/553en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectUranium dioxideen_AU
dc.subjectFluidized bed reactorsen_AU
dc.subjectCalcinationen_AU
dc.subjectChemical reaction kineticsen_AU
dc.subjectSinteringen_AU
dc.titleThe production of sinterable uranium dioxide from ammonium diuranate, Part 3 - continuous production in a pulsed fluidised bed reactoren_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
AAEC-E-347.pdf
Size:
745.61 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Scientific and Technical Reports