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dc.contributor.authorGonzalez Robles, E.
dc.contributor.authorSerrano Purroy, D.
dc.contributor.authorSureda, R.
dc.contributor.authorCasas Pons, Ignasi
dc.contributor.authorPablo Ribas, Joan de
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2017-02-10T11:45:34Z
dc.date.available2017-10-03T00:30:26Z
dc.date.issued2015-10-01
dc.identifier.citationGonzalez, E., Serrano, D., Sureda, R., Casas, I., Pablo, J. Dissolution experiments of commercial PWR (52 MWd/kgU) and BWR (53 MWd/kgU) spent nuclear fuel cladded segments in bicarbonate water under oxidizing conditions. Experimental determination of matrix and instant release fraction. "Journal of nuclear materials", 1 Octubre 2015, vol. 465, p. 63-70.
dc.identifier.issn0022-3115
dc.identifier.urihttp://hdl.handle.net/2117/100834
dc.description.abstractThe denominated instant release fraction (IRF) is considered in performance assessment (PA) exercises to govern the dose that could arise from the repository. A conservative definition of IRF comprises the total inventory of radionuclides located in the gap, fractures, and the grain boundaries and, if present, in the high burn-up structure (HBS). The values calculated from this theoretical approach correspond to an upper limit that likely does not correspond to what it will be expected to be instantaneously released in the real system. Trying to ascertain this IRF from an experimental point of view, static leaching experiments have been carried out with two commercial UO2 spent nuclear fuels (SNF): one from a pressurized water reactor (PWR), labelled PWR, with an average burn-up (BU) of 52 MWd/kgU and fission gas release (FGR) of 23.1%, and one from a boiling water reactor (BWR), labelled BWR, with an average BU of and 53 MWd/kgU and FGR of 3.9%.; One sample of each SNF, consisting of fuel and cladding, has been leached in bicarbonate water during one year under oxidizing conditions at room temperature (25 +/- 5) degrees C. The behaviour of the concentration measured in solution can be divided in two according to the release rate. All radionuclides presented an initial release rate that after some days levels down to a slower second one, which remains constant until the end of the experiment. Cumulative fraction of inventory in aqueous phase (FIAPc) values has been calculated. Results show faster release in the case of the PWR SNF. In both cases Np, Pu, Am, Cm, Y, Tc, La and Nd dissolve congruently with U, while dissolution of Zr, Ru and Rh is slower. Rb, Sr, Cs and Mo, dissolve faster than U. The IRF of Cs at 10 and 200 days has been calculated, being (3.10 +/- 0.62) and (3.66 +/- 0.73) for PWR fuel, and (035 +/- 0.07) and (0.51 +/- 0.10) for BWR fuel. (C) 2015 Elsevier B.V. All rights reserved.
dc.format.extent8 p.
dc.language.isoeng
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshRadioactive waste canisters
dc.subject.otherSpent nuclear fuel
dc.subject.otherStatic leaching
dc.subject.otherInstant release fraction
dc.subject.otherGap contribution
dc.subject.otherhigh burn-up
dc.subject.othertemperature air oxidation
dc.subject.otherfission-gas release
dc.subject.othersource-term model
dc.subject.othergrain-boundary
dc.subject.othercandu fuels
dc.subject.otheruo2 fuel
dc.subject.othergeological disposal
dc.subject.otheroxide fuels
dc.subject.otherbehavior
dc.titleDissolution experiments of commercial PWR (52 MWd/kgU) and BWR (53 MWd/kgU) spent nuclear fuel cladded segments in bicarbonate water under oxidizing conditions. Experimental determination of matrix and instant release fraction
dc.typeArticle
dc.subject.lemacCombustibles nuclears gastats -- Emmagatzematge -- Mesures de seguretat
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.identifier.doi10.1016/j.jnucmat.2015.05.012
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0022311515300027
dc.rights.accessOpen Access
drac.iddocument17509967
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorGonzalez, E., Serrano, D., Sureda, R., Casas, I., Pablo, J.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameJournal of nuclear materials
upcommons.citation.volume465
upcommons.citation.startingPage63
upcommons.citation.endingPage70


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