Matches in SemOpenAlex for { <https://semopenalex.org/work/W2010031623> ?p ?o ?g. }
Showing items 1 to 85 of
85
with 100 items per page.
- W2010031623 endingPage "264" @default.
- W2010031623 startingPage "247" @default.
- W2010031623 abstract "The sites at Bangombé and Okélobondo (Oklo) in Gabon provide a unique opportunity to study the behaviour of products from natural nuclear reactions in the vicinity of reactor zones which were active around two billion years ago. The Commission of the European Communities initiated the Oklo Natural Analogue Programme. One of the principal aims was to study indications of present time migration of elements from the reactor zones under ambient conditions. The hydrogeological and hydrochemical data from the Oklo sites were modelled in order to better understand the geochemical behaviour of radionuclides in the natural system, by using independent models and by comparing the modelling outcome. Two modelling approaches were used: M3 code (hydrochemical mixing and mass balance model), developed by the Swedish Nuclear Fuel and Waste Management Company (SKB) and HYTEC (reactive transport model) developed by Ecole des Mines de Paris. Two different reactor zones were studied: Bangombé, a shallow site, the reactor being at 11 m depth, and OK84 at Okélobondo, situated at about 450 m depth, more comparable with a real repository location. This allowed the validation of modelling tools in two different sedimentary environments: one shallow, with a more homogeneous layering situated in an area of meteoric alteration, and the other offering the opportunity to study radionuclide migration from the reaction zone over a distance of 450 m through very heterogeneous sedimentary layers. The modeling results indicate that the chemical reactions retarding radionuclide transport are very different at the two sites. At Bangombé, the decomposition of organic material consumes oxygen and at Okélobondo the oxygen is consumed by inorganic reactions resulting, in both cases, in uranium retardation. Both modelling approaches (statistic with M3 code and deterministic with HYTEC code) could describe this situation. The goal of this exercise is to test codes which can help to describe and understand the processes taking place at the sites, validate the models with in situ data, and thus build confidence in the tools used for future site characterization. Ultimately, this allows identifying and selecting processes and parameters that can be used as input into repository performance assessment calculations and modelling exercises." @default.
- W2010031623 created "2016-06-24" @default.
- W2010031623 creator A5010014555 @default.
- W2010031623 creator A5041292458 @default.
- W2010031623 creator A5076912869 @default.
- W2010031623 creator A5081886330 @default.
- W2010031623 date "2003-03-01" @default.
- W2010031623 modified "2023-09-26" @default.
- W2010031623 title "Uranium transport around the reactor zone at Bangombé and Okélobondo (Oklo): examples of hydrogeological and geochemical model integration and data evaluation" @default.
- W2010031623 cites W2069781152 @default.
- W2010031623 cites W2146320349 @default.
- W2010031623 doi "https://doi.org/10.1016/s0169-7722(02)00131-6" @default.
- W2010031623 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12598108" @default.
- W2010031623 hasPublicationYear "2003" @default.
- W2010031623 type Work @default.
- W2010031623 sameAs 2010031623 @default.
- W2010031623 citedByCount "19" @default.
- W2010031623 countsByYear W20100316232012 @default.
- W2010031623 countsByYear W20100316232014 @default.
- W2010031623 countsByYear W20100316232016 @default.
- W2010031623 countsByYear W20100316232022 @default.
- W2010031623 countsByYear W20100316232023 @default.
- W2010031623 crossrefType "journal-article" @default.
- W2010031623 hasAuthorship W2010031623A5010014555 @default.
- W2010031623 hasAuthorship W2010031623A5041292458 @default.
- W2010031623 hasAuthorship W2010031623A5076912869 @default.
- W2010031623 hasAuthorship W2010031623A5081886330 @default.
- W2010031623 hasConcept C121332964 @default.
- W2010031623 hasConcept C127313418 @default.
- W2010031623 hasConcept C127413603 @default.
- W2010031623 hasConcept C151730666 @default.
- W2010031623 hasConcept C158973077 @default.
- W2010031623 hasConcept C17409809 @default.
- W2010031623 hasConcept C185544564 @default.
- W2010031623 hasConcept C187320778 @default.
- W2010031623 hasConcept C2776608160 @default.
- W2010031623 hasConcept C33556824 @default.
- W2010031623 hasConcept C39432304 @default.
- W2010031623 hasConcept C548081761 @default.
- W2010031623 hasConcept C555451288 @default.
- W2010031623 hasConcept C6494504 @default.
- W2010031623 hasConcept C7083945 @default.
- W2010031623 hasConcept C76177295 @default.
- W2010031623 hasConcept C76886044 @default.
- W2010031623 hasConcept C89690796 @default.
- W2010031623 hasConceptScore W2010031623C121332964 @default.
- W2010031623 hasConceptScore W2010031623C127313418 @default.
- W2010031623 hasConceptScore W2010031623C127413603 @default.
- W2010031623 hasConceptScore W2010031623C151730666 @default.
- W2010031623 hasConceptScore W2010031623C158973077 @default.
- W2010031623 hasConceptScore W2010031623C17409809 @default.
- W2010031623 hasConceptScore W2010031623C185544564 @default.
- W2010031623 hasConceptScore W2010031623C187320778 @default.
- W2010031623 hasConceptScore W2010031623C2776608160 @default.
- W2010031623 hasConceptScore W2010031623C33556824 @default.
- W2010031623 hasConceptScore W2010031623C39432304 @default.
- W2010031623 hasConceptScore W2010031623C548081761 @default.
- W2010031623 hasConceptScore W2010031623C555451288 @default.
- W2010031623 hasConceptScore W2010031623C6494504 @default.
- W2010031623 hasConceptScore W2010031623C7083945 @default.
- W2010031623 hasConceptScore W2010031623C76177295 @default.
- W2010031623 hasConceptScore W2010031623C76886044 @default.
- W2010031623 hasConceptScore W2010031623C89690796 @default.
- W2010031623 hasIssue "1-4" @default.
- W2010031623 hasLocation W20100316231 @default.
- W2010031623 hasLocation W20100316232 @default.
- W2010031623 hasOpenAccess W2010031623 @default.
- W2010031623 hasPrimaryLocation W20100316231 @default.
- W2010031623 hasRelatedWork W152466381 @default.
- W2010031623 hasRelatedWork W1821092263 @default.
- W2010031623 hasRelatedWork W2052099074 @default.
- W2010031623 hasRelatedWork W2086573172 @default.
- W2010031623 hasRelatedWork W2188318313 @default.
- W2010031623 hasRelatedWork W23228404 @default.
- W2010031623 hasRelatedWork W2349677304 @default.
- W2010031623 hasRelatedWork W2360458116 @default.
- W2010031623 hasRelatedWork W2511259676 @default.
- W2010031623 hasRelatedWork W4200415484 @default.
- W2010031623 hasVolume "61" @default.
- W2010031623 isParatext "false" @default.
- W2010031623 isRetracted "false" @default.
- W2010031623 magId "2010031623" @default.
- W2010031623 workType "article" @default.