Study of continuous precipitation of ADU for the implantation in the pilot installation at the Atomic Energy Institute, Brazil. Estudo de precipitacao continua de DUA para a implantacao na instalacao piloto CEQ-IEA

Technical Report · Wed May 15 04:00:00 EDT 1974

OSTI ID:4142784

Araujo, Jose Adroalado de

The paper deals with the ammonium diuranate continuous precipitation with a high chemical purity degree from uranyl nitrate solutions, using 1.2 and 2.4 ammonium hydroxide solutions and gaseous NH{sub 3} as a precipitating agent. The precipitations were carried out in a continuous procedure with one and two stages. The variables studied were the NH[sub 4}OH solutions concentration, ADU precipitation curve, the flow rate of reactants, the temperature of the precipitation, pH of the suspended ADU, and ammonium diuranate filtrability. The experimental work performed and the data obtained permitted the design of a chemical reactor for the continuous nuclear grade ADU precipitation at the Chemical Engineering Department of the Atomic Energy Institute of Sao Paulo.

• Research Organization: Instituto de Energia Atomica, Sao Paulo (Brazil). Divisao de Engenharia Quimica
• NSA Number: NSA-33-008901
• OSTI ID: 4142784
• Report Number(s): IEA--339
• Country of Publication: Brazil
• Language: Portuguese

Related Subjects

*AMMONIUM URANATES-- PRECIPITATION
050400* --Nuclear Fuels--Feed Processing
AMMONIA
AMMONIUM HYDROXIDES
DENSITY
FILTRATION
FLOW RATE
N40240* --Chemistry--Inorganic
Organic
&
PH VALUE
PILOT PLANTS
Physical Chemistry--Feed Materials Processing
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
TEMPERATURE DEPENDENCE
URANYL NITRATES