Process for the production of free-flowing directly compactable uranium dioxide powder with adjustable sintering properties and apparatus for this process
A process is described for the production of pourable, directly compactable uranium dioxide powder by continuous precipitation of uranium peroxide from a sintered uranyl nitrate solution at a pH of 1 to 2.5 with hydrogen peroxide, calcining of the peroxide at 500 to 800/sup 0/C, and subsequent reduction at 550 to 750/sup 0/C. The precipitation solution contains 70 to 150 g/l of uranium and 0.80 g/l of ammonium nitrate and is treated with 15 to 20% aqueous hydrogen peroxide solution in the ratio of U:H/sub 2/O/sub 2/ from 1:1.5 to 1:3 and there is led through the solution a mixture of ammonium and air having an air-ammonia volume ratio of 1:0.3 to 0.6. An apparatus for carrying out the process is also described.
- Assignee:
- Nukem GmbH
- Patent Number(s):
- US 4152395
- OSTI ID:
- 5067858
- Country of Publication:
- United States
- Language:
- English
Similar Records
Continuous process for the production of powdered uranium dioxide from uranyl nitrate
Uranium peroxide in the form of spherical particles having good flowability and processes for preparing same
Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ACTINIDE COMPOUNDS
AIR
AMMONIA
AMMONIUM COMPOUNDS
AMMONIUM NITRATES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPACTING
DISPERSIONS
EQUIPMENT
FLUIDS
GASES
HIGH TEMPERATURE
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
MATERIALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PH VALUE
POWDERS
PRECIPITATION
PRODUCTION
QUANTITY RATIO
SEPARATION PROCESSES
SINTERED MATERIALS
SOLUTIONS
TEMPERATURE DEPENDENCE
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
URANIUM PEROXIDES
URANYL COMPOUNDS
URANYL NITRATES
YIELDS