Published 1988 | Version v1
Miscellaneous Restricted

Studies of the conversion-chemistry of plutonium and uranium in the nitrate- and carbonate-systems

Creators

Description

A novel type construction of an autoclave for dissolving of plutonium dioxide in concentrated nitric acid (without any admixtures) has been developed. This process allows the dissolving of batches with high oxide/acid ratio and yields plutonium-solutions of high concentration. The tests for separation of plutonium- and, respectively, uranium-process-solutions from Am-241 and other interfering impurities are described. The time-factor for the oxidation-reaction of plutonium in nitric acid with ozone has been optimized. Important data on the solubility-behavior of plutonyl(VI)- and of pure Pu(IV)-nitrates have been gained. The majority of the precipitates, occuring in theses reactions, were characterized. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

In einer neu entwickelten Autoklavenkonstruktion konnte Plutoniumdioxid in einem Druckextraktionsverfahren mit konzentrierter Salpetersaeure ohne Zusaetze geloest werden. Das Verfahren gestattet das Loesen bei hohen Oxid/Saeure-Verhaeltnissen und fuehrt so zu hochkonzentrierten Plutoniumloesungen. Versuche zur Abreicherung von Americium-241 und anderen stoerenden Verunreinigungen vom Plutonium bzw. Uran in Prozessloesungen sind beschrieben. Der Zeitfaktor bei der Oxidation salpetersaurer Plutoniumloesungen mit Ozon konnte optimiert werden. Ueber das Loeslichkeitsverhalten reiner Plutonyl(VI)- sowie reiner Pu(IV)-nitrate wurden wichtige Daten gesammelt. Die dabei auftretenden Bodenkoerper konnten zum grossen Teil characterisiert werden. (orig.)

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Additional details

Additional titles

Subtitle (English)
Final report
Original title (German)
Untersuchungen zur Konversionschemie des Plutoniums und Urans in Nitrato- und Carbonatosystemen
Original subtitle (German)
Schlussbericht.

Publishing Information

Imprint Pagination
40 p.
Report number
INIS-mf--11999

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
20074966
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Descriptors DEI
ALPHA SPECTRA; AMERICIUM 241; AUTOCLAVES; CRYSTALLIZATION; DISSOLUTION; FLUORIDES; HIGH TEMPERATURE; IMPURITIES; MEDIUM PRESSURE; NITRIC ACID; OXIDATION; OZONE; PLUTONIUM DIOXIDE; PLUTONIUM NITRATES; PLUTONYL COMPOUNDS; SEPARATION PROCESSES; SOLUBILITY; URANIUM NITRATES; WATER
Descriptors DEC
ACTINIDE COMPOUNDS; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; CHALCOGENIDES; CHEMICAL REACTIONS; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HEAVY NUCLEI; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; ISOTOPES; NITRATES; NITROGEN COMPOUNDS; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PLUTONIUM COMPOUNDS; PLUTONIUM OXIDES; POLAR SOLVENTS; RADIOISOTOPES; SOLVENTS; SPECTRA; SPONTANEOUS FISSION RADIOISOTO; TRANSURANIUM COMPOUNDS; URANIUM COMPOUNDS; YEARS LIVING RADIOISOTOPES

Optional Information

Contract/Grant/Project number
Contract BMFT 02U5635