Published April 30, 1979
| Version v1
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Method to accelerate and increase the solubility of plutonium dioxide and uranium/plutonium oxide fuels and their unsoluble residues in nitric acid
Description
The solubility of plutonium dioxide and mixed uranium/plutonium oxides in nitric acid can be increased during the reprocessing of nuclear fuels if the metal charge constitutes at least 200 g Pu (or Pu + U) per litre of the solution. The solids should be dissolved in nitric acid (preferably 7 molar HNO3) in the form of plutonium nitrate to a level of at least 100 g Pu per litre. The plutonium nitrate may then be removed from the production stream of a reprocessing operation. The plutonium acts as an autocatalyst. Examples and diagrams serve to illustrate this method. (RB)
Availability note (English)
MF available from INIS under the Report Number; Available from Deutsches Patentamt, Muenchen (Germany, F.R.).Abstract (German)
Bei der Aufarbeitung von Kernbrennstoffen aus schnellen Reaktoren kann die Loeslichkeit von Plutoniumdioxid und von gemischten Uran/plutonium-Oxiden in Salpetersaeure beschleunigt werden, wenn die Metallbeladung mindestens 200 g Pu oder (Pu+U) pro Liter der aufloesenden Loesung betraegt. Die Feststoffe sollen dabei in Salpetersaeure (vorzugsweise 7 molare HNO3) mit einem Gehalt von mindestens 100 g Pu/l in Form von Plutoniumsnitrat aufgeloest werden, wobei dieses dem Produktstrom eines Wiederaufarbeitungsprozesses entnommen werden kann. Das Plutonium wirkt dabei als Autokatalysator. Beispiele und Zeichnungen erlaeutern das Verfahren. (RB)Files
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Additional details
Additional titles
- Original title (German)
- Verfahren zur Beschleunigung und Erhoehung der Loeslichkeit von Plutoniumdioxid- und Uran-/Plutoniumoxid-Brennstoffen und deren unloeslichen Rueckstaenden in Salpetersaeure
Publishing Information
- Imprint Pagination
- 14 p.
- IPC:
- Int. Cl. G21C 19/46.
- IPC
- Int. Cl. G21C 19/46.
- Patent number
- DE patent document 3016516/A/
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 14775062
- Subject category
- S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
- Descriptors DEI
- CATALYSIS; CATALYSTS; DISSOLUTION; MIXTURES; NITRIC ACID; PLUTONIUM DIOXIDE; PLUTONIUM NITRATES; REPROCESSING; SOLUBILITY; SPENT FUELS; URANIUM DIOXIDE
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHALCOGENIDES; DISPERSIONS; ENERGY SOURCES; FUELS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; MATERIALS; NITRATES; NITROGEN COMPOUNDS; NUCLEAR FUELS; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM COMPOUNDS; PLUTONIUM OXIDES; REACTOR MATERIALS; SEPARATION PROCESSES; TRANSURANIUM COMPOUNDS; URANIUM COMPOUNDS; URANIUM OXIDES
Optional Information
- Secondary number(s)
- GB priority 7914978; GB priority 7938498.