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Effect of hydrogen gas and leaching solution on the fast release of fission products from two PWR fuels

Mennecart, T. ; Iglesias, L. ORCID iD icon 1; Herm, M. ORCID iD icon 1; König, T. ORCID iD icon 1; Leinders, G.; Cachoir, C.; Lemmens, K.; Verwerft, M.; Metz, V. ORCID iD icon 1; González-Robles, E.; Meert, K.; Vandoorne, T.; Gaggiano, R.
1 Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

To study the dissolution of UOX spent nuclear fuel in a deep geological environment and the fast release of a selection of relevant radionuclides for long-term safety of this high level waste, leaching experiments were performed with spent nuclear fuel samples originating from the pressurized water reactors (PWRs) Tihange 1 and Gösgen with a similar burnup (50 – 55 MWd.kgHM−1) but different irradiation histories. Six experiments were conducted to investigate the effect of two critical parameters: (1) the highly alkaline environment caused by the presence of cementitious materials in the “Supercontainer design”, which is currently the reference design for the long-term management of the high-level nuclear waste forms in Belgium, and (2) the reducing conditions imposed by the presence of hydrogen from the corrosion of iron-based materials present in the engineered barriers. The experiments were performed using autoclaves under pressure from 1 to 40 bar with a pure Ar atmosphere or a mixture of H2/Ar. Divided into two consecutive phases, the total experimental duration was about 1400 days. The Phase I provided mainly information about the fast release of the fission products while the perspective of the Phase II was to study the long-term evolution of the spent fuel matrix. ... mehr

Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2024
Sprache Englisch
Identifikator ISSN: 0022-3115
KITopen-ID: 1000163843
HGF-Programm 32.11.01 (POF IV, LK 01) Nuclear Waste Disposal
Erschienen in Journal of Nuclear Materials
Verlag Elsevier
Band 588
Seiten 154811
Nachgewiesen in Dimensions
OpenAlex
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 12 – Nachhaltiger Konsum und Produktion

Preprint §
DOI: 10.5445/IR/1000163843
Veröffentlicht am 07.11.2023
Originalveröffentlichung
DOI: 10.1016/j.jnucmat.2023.154811
Scopus
Zitationen: 5
Dimensions
Zitationen: 5
Seitenaufrufe: 55
seit 08.11.2023
Downloads: 30
seit 08.11.2023
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