Výsledky vyhledávání - "Karel Lemmens"

Static dissolution experiments under hyperalkaline conditions with dispersed and confined SM539 glass

Autor: Karine Ferrand, Sébastien Caes, Karel Lemmens, Sanheng Liu, Katrien Meert

Publikováno v: MRS Advances. 7:95-99

In the context of the geological disposal of vitrified radioactive waste, cracks are expected at the full scale of the glass blocks. To simulate glass alteration in cracks, static dissolution experiments were conducted with confined SM539 glass powde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fbadd5abfa694a9b45d080287521112f
https://doi.org/10.1557/s43580-022-00214-5

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Caesium and iodine release from spent mixed oxide fuels under repository relevant conditions: Initial leaching results

Autor: Christian Schreinemachers, Gregory Leinders, Thierry Mennecart, Christelle Cachoir, Karel Lemmens, Marc Verwerft, Felix Brandt, Guido Deissmann, Giuseppe Modolo, Dirk Bosbach

Publikováno v: MRS advances 7, 100-104 (2022). doi:10.1557/s43580-022-00220-7

Autoclave leaching experiments are conducted on three well-characterised, irradiated, and cladded mixed oxide fuel-rod segments with burnups ranging from 29 GWd/tHM to 52 GWd/tHM to investigate the instant release fraction of fission gases and long-l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66303f8cdf8ae2c711f4a12314e0bf1b
https://hdl.handle.net/2128/31627

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Understanding the corrosion behaviour of used mixed oxide fuels under repository relevant conditions: Initial results of autoclave leaching experiments

Autor: Christian Schreinemachers, Giuseppe Modolo, Gregory Leinders, Thierry Mennecart, Christelle Cachoir, Karel Lemmens, Marc Verwerft, Guido Deissmann, Dirk Bosbach

Publikováno v: 45th Scientific Basis for Nuclear Waste Management Symposium, SBNWM, virtual event, Germany, 2021-10-25-2021-10-28

Theslides werepresented at the 45th Scientific Basis for Nuclear Waste Management SymposiumonOctober 27, 2021. Abstract Disposal in a deep geological repository (DGR) based on a multibarrier concept is considered as the safest and most sustainable op

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acc469d3fdc74c7789b597ea9763dd50

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Influence of young cement water on the corrosion of the International Simple Glass

Autor: Sanheng Liu, Colleen Mann, Claire L. Corkhill, Jeremy R. Eskelsen, Eric M. Pierce, Karel Lemmens, Karine Ferrand

Publikováno v: npj Materials Degradation, Vol 3, Iss 1, Pp 1-9 (2019)

Understanding the corrosion of nuclear waste glass is critical to predicting its safe disposal within a geological facility. The corrosion mechanisms and kinetics of the International Simple Glass, a simplified version of high-level nuclear waste gla

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57dec9a6c5e50d283e30725a64f76429
http://link.springer.com/article/10.1038/s41529-018-0059-9

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Dissolution of simplified nuclear waste glass and formation of secondary phases

Autor: Karine Ferrand, Sébastien Caes, Jenna Poonoosamy, Karel Lemmens, Juri Barthel, Felix Brandt, Dirk Bosbach, Wouter Van Van Renterghem, Martina Klinkenberg

Publikováno v: Interdisciplinary research symposium On the safety of nuclear disposal practices 2021, safeND, Berlin, online, Germany, 2021-11-10-2021-11-12

Immobilization of high-level and intermediate-level nuclear wastes by vitrification in borosilicate glass is a well-established process. There is a consensus between the waste management agencies of many countries and many experts that vitrified nucl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7958cfb3ad70117b7665b0f18966e952
https://doi.org/10.5194/sand-1-143-2021

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Dissolution Kinetics of International Simple Glass and Formation of Secondary Phases at Very High Surface Area to Solution Ratio in Young Cement Water

Autor: Dirk Bosbach, Sébastien Caes, Wouter Van Van Renterghem, Juri Barthel, Jenna Poonoosamy, Karel Lemmens, Karine Ferrand, Martina Klinkenberg, Felix Brandt

Publikováno v: Materials
Volume 14
Issue 5
Materials 14(5), 1254-(2021). doi:10.3390/ma14051254
Materials, Vol 14, Iss 1254, p 1254 (2021)

Static dissolution experiments were carried out with the reference International Simple Glass under hyperalkaline pH at 70 °C and very high SA/V ratio. Three aspects of glass dissolution behavior were investigated, (1) the rate drop regime and the r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a9a2d7c6ab61d7dacee85898bdc507e
https://pubmed.ncbi.nlm.nih.gov/33800843

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Leaching Experiments on UOX and MOX Spent Fuel: Results and Prospects of the SF-ALE Project at SCK CEN

Autor: Gregory Leinders, Jan Eysermans, Thierry Mennecart, Christelle Cachoir, Karel Lemmens, Christian Schreinemachers, Guido Deissmann, Giuseppe Modolo, Dirk Bosbach, Marc Verwerft

Publikováno v: Topfuel 2021, Santander, Spain, 2021-10-24-2021-10-28

Technical paper submitted for peer-review, accepted, and presented at the 2021 Topfuel conference (October 24-28, 2021). The conference was hosted as a hybrid event with on-site attendance (Santander, Spain) and remote attendance via a web applicatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2414a33357063a314b2d6cd4400b8c3b
https://hdl.handle.net/2128/28908

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Fast release from clad and declad spent UOX PWR fuel segments in a bicarbonate solution under anoxic conditions

Autor: Karel Lemmens, Thierry Mennecart, Christelle Cachoir

Publikováno v: Journal of Nuclear Materials. 557:153257

For the safety assessment of Spent Nuclear Fuel (SNF) in disposal conditions, it is crucial to determine the fast release of the potentially critical radionuclides (e.g. 129I, 137Cs, 99Tc, 93Mo, 90Sr…) upon contact with water. To underpin the quant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63f527332aac40940e806c29292998c6
https://doi.org/10.1016/j.jnucmat.2021.153257

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Determination of the Forward Dissolution Rate for International Simple Glass in Alkaline Solutions

Autor: Alice Elia, Karel Lemmens, Karine Ferrand

Publikováno v: MRS Advances. 2:661-667

The International Simple Glass (ISG) is considered as reference benchmark glass and is used in the frame of an international collaboration for the study of the dissolution mechanisms of high-level vitrified nuclear waste.In this work the forward diss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a042a957b9a96644f7976d42e5d674d2
https://doi.org/10.1557/adv.2016.672

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Repartition of the uranium isotopes within the Belgian UOX spent fuel

Autor: A. Dobney, Christelle Cachoir, L. Adriaensen, K. Govers, Karel Lemmens, Th. Mennecart

Publikováno v: MRS Advances. 1:4139-4145

In the framework of the Euratom FIRST-Nuclides program, SCK•CEN conducted leaching experiments on a PWR UOX fuel, taken from the Belgian Tihange 1 reactor, with an average rod burnup of 50 MWd/kgHM in order to determine the rapid release of some of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76fadc036161256abe277d9a33048a8e
https://doi.org/10.1557/adv.2017.201

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