Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process
In the Purex process for reprocessing spent fuel elements, separation of uranium and plutonium is attained through a valency adjustment of Pu(III). This report describes the use of electrochemical methods in the absence of hydrazine for the adjustment of Pu(III), in place of nitrous oxide itself (or...
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ftosti:oai:osti.gov:7777272 2023-07-30T04:02:56+02:00 Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process Heilgeist, M. Flory, K. Galla, U. Schieder, H. 2017-11-29 application/pdf http://www.osti.gov/servlets/purl/7777272 https://www.osti.gov/biblio/7777272 https://doi.org/10.2172/7777272 unknown http://www.osti.gov/servlets/purl/7777272 https://www.osti.gov/biblio/7777272 https://doi.org/10.2172/7777272 doi:10.2172/7777272 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY; HYDRAZINE; COMPARATIVE EVALUATIONS; NITRIC OXIDE; NITROUS ACID; PLUTONIUM; REDUCTION; REDUCING AGENTS; CHEMICAL REACTION KINETICS; ELECTROCHEMISTRY; ELECTROLYSIS; OXIDATION; PH VALUE; PUREX PROCESS; REDOX REACTIONS; TEMPERATURE DEPENDENCE; URANIUM; UREA; VALENCE; ACTINIDES; AMIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; ELEMENTS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; KINETICS; LYSIS; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; REPROCESSING; SEPARATION PROCESSES; TRANSURANIUM ELEMENTS 2017 ftosti https://doi.org/10.2172/7777272 2023-07-11T10:56:34Z In the Purex process for reprocessing spent fuel elements, separation of uranium and plutonium is attained through a valency adjustment of Pu(III). This report describes the use of electrochemical methods in the absence of hydrazine for the adjustment of Pu(III), in place of nitrous oxide itself (or nitric oxide) as a reducing agent. This was tried at low acid concentrations in which nitrous acid no longer functions oxidatively. The following factors and effects were investigated: nitric acid concentration, current density, temperature, uranium content, surface area of electrodes, and the effect of very low hydrazine concentrations. In addition, the reoxidation properties of completely reduced Pu(III)-containing solutions were investigated. Results of laboratory experiments on purely aqueous systems were compared with those from TBP/dodecane/HNO/sub 3/ systems in a pulse column. Information gained from laboratory experiments on U/Pu separation in the absence of hydrazine was confirmed in pulse-column experiments. Other/Unknown Material Carbonic acid SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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topic |
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY; HYDRAZINE; COMPARATIVE EVALUATIONS; NITRIC OXIDE; NITROUS ACID; PLUTONIUM; REDUCTION; REDUCING AGENTS; CHEMICAL REACTION KINETICS; ELECTROCHEMISTRY; ELECTROLYSIS; OXIDATION; PH VALUE; PUREX PROCESS; REDOX REACTIONS; TEMPERATURE DEPENDENCE; URANIUM; UREA; VALENCE; ACTINIDES; AMIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; ELEMENTS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; KINETICS; LYSIS; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; REPROCESSING; SEPARATION PROCESSES; TRANSURANIUM ELEMENTS |
spellingShingle |
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY; HYDRAZINE; COMPARATIVE EVALUATIONS; NITRIC OXIDE; NITROUS ACID; PLUTONIUM; REDUCTION; REDUCING AGENTS; CHEMICAL REACTION KINETICS; ELECTROCHEMISTRY; ELECTROLYSIS; OXIDATION; PH VALUE; PUREX PROCESS; REDOX REACTIONS; TEMPERATURE DEPENDENCE; URANIUM; UREA; VALENCE; ACTINIDES; AMIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; ELEMENTS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; KINETICS; LYSIS; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; REPROCESSING; SEPARATION PROCESSES; TRANSURANIUM ELEMENTS Heilgeist, M. Flory, K. Galla, U. Schieder, H. Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
topic_facet |
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY; HYDRAZINE; COMPARATIVE EVALUATIONS; NITRIC OXIDE; NITROUS ACID; PLUTONIUM; REDUCTION; REDUCING AGENTS; CHEMICAL REACTION KINETICS; ELECTROCHEMISTRY; ELECTROLYSIS; OXIDATION; PH VALUE; PUREX PROCESS; REDOX REACTIONS; TEMPERATURE DEPENDENCE; URANIUM; UREA; VALENCE; ACTINIDES; AMIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; ELEMENTS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; KINETICS; LYSIS; METALS; NITROGEN COMPOUNDS; NITROGEN OXIDES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; REPROCESSING; SEPARATION PROCESSES; TRANSURANIUM ELEMENTS |
description |
In the Purex process for reprocessing spent fuel elements, separation of uranium and plutonium is attained through a valency adjustment of Pu(III). This report describes the use of electrochemical methods in the absence of hydrazine for the adjustment of Pu(III), in place of nitrous oxide itself (or nitric oxide) as a reducing agent. This was tried at low acid concentrations in which nitrous acid no longer functions oxidatively. The following factors and effects were investigated: nitric acid concentration, current density, temperature, uranium content, surface area of electrodes, and the effect of very low hydrazine concentrations. In addition, the reoxidation properties of completely reduced Pu(III)-containing solutions were investigated. Results of laboratory experiments on purely aqueous systems were compared with those from TBP/dodecane/HNO/sub 3/ systems in a pulse column. Information gained from laboratory experiments on U/Pu separation in the absence of hydrazine was confirmed in pulse-column experiments. |
author |
Heilgeist, M. Flory, K. Galla, U. Schieder, H. |
author_facet |
Heilgeist, M. Flory, K. Galla, U. Schieder, H. |
author_sort |
Heilgeist, M. |
title |
Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
title_short |
Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
title_full |
Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
title_fullStr |
Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
title_full_unstemmed |
Investigation of a hydrazine-free, electrochemical reduction of Pu(IV) in the Purex process |
title_sort |
investigation of a hydrazine-free, electrochemical reduction of pu(iv) in the purex process |
publishDate |
2017 |
url |
http://www.osti.gov/servlets/purl/7777272 https://www.osti.gov/biblio/7777272 https://doi.org/10.2172/7777272 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www.osti.gov/servlets/purl/7777272 https://www.osti.gov/biblio/7777272 https://doi.org/10.2172/7777272 doi:10.2172/7777272 |
op_doi |
https://doi.org/10.2172/7777272 |
_version_ |
1772813816484069376 |