Study of magnetite-nickel ferrites solid phases equilibria in the PWR primary conditions
Creators
- 1. CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)
Description
The oxydo-reduction reaction: 3NiFe2O4 + 4H2 <--> 2Fe3O4 + 3Ni + 4H2O (1) was studied between 200 deg C and 350 deg C by measuring hydrogen pressure variations as a function of time. Analysis of solid phase showed that beside (1), another reaction takes place, that is: xNiFe2O4 + (1-x) Fe3O4 -> Nisub(x)Fesub(3-x)O4 (2). The determination of the first reaction equilibrium constant allows definition of the stability limits of the ferrite NiFe2O4 in hydrogenated aqueous solutions and calculation of the free enthalpy of formation of this ferrite at the different temperatures. If NiFe2O4 is alone, its solubility may be evaluated from the free enthalpy. Further experimental study of reaction (2) is necessary to predict the solubility of non stoichiometric ferrites and of mixtures of NiFe2O4 and Fe3O4. (author)
Additional details
Publishing Information
- Publisher
- British Nuclear Energy Society.
- Imprint Place
- London (UK)
- ISBN
- 0-7277-0201-7
- Imprint Title
- Water chemistry of nuclear reactor systems 3 vol. 1. Proceedings of an international conference organised by the British Nuclear Energy Society and co-sponsored by the Institution of Chemical En and the Royal Society of Chemistry, Bournemouth, 17-21 October, 1983
- Imprint Pagination
- 393 p.
- Journal Page Range
- p. 37-41.
Conference
- Title
- Water chemistry of nuclear reactor systems 3.
- Dates
- 17-21 Oct 1983.
- Place
- Bournemouth (UK).
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 15024301
- Subject category
- S36: MATERIALS SCIENCE; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AQUEOUS SOLUTIONS; CHEMICAL REACTION KINETICS; CORROSION; CORROSION PRODUCTS; FERRITES; FORMATION FREE ENTHALPY; HYDROGEN; MAGNETITE; NICKEL COMPOUNDS; PRESSURE MEASUREMENT; PRIMARY COOLANT CIRCUITS; PWR TYPE REACTORS; SOLIDS; SOLUBILITY; TEMPERATURE DEPENDENCE
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; COOLING SYSTEMS; DISPERSIONS; ELEMENTS; ENERGY; FERRIMAGNETIC MATERIALS; FREE ENTHALPY; HOMOGENEOUS MIXTURES; IRON COMPOUNDS; IRON ORES; IRON OXIDES; KINETICS; MAGNETIC MATERIALS; MATERIALS; MINERALS; MIXTURES; NONMETALS; ORES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTION KINETICS; REACTOR COMPONENTS; REACTOR COOLING SYSTEMS; REACTORS; SOLUTIONS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Notes
- Imprint:Includes 11 separately paginated papers.