Ten years after the NPP accident at Fukushima : review on fuel debris behavior in contact with water
| Autor: | Ayako Nitta, Ryu Takami, Yoshikazu Koma, Toshihiko Ohnuki, Hugo Laffolley, Satoshi Utsunomiya, Christophe Jegou, Kazuki Fueda, Bernd Grambow, Christophe Journeau, Atsuhiro Shibata |
|---|---|
| Přispěvatelé: | Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire d'Etudes du Comportement à Long Terme des matériaux de conditionnement (LCLT), Département de recherche sur les technologies pour l'enrichissement, le démantèlement et les déchets (DE2D), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Département de recherche sur les Procédés et Matériaux pour les Environnements complexes (DPME) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[PHYS]Physics [physics]
Nuclear and High Energy Physics Waste management 020209 energy FUKUSHIMA 02 engineering and technology 010501 environmental sciences Corium 7. Clean energy 01 natural sciences Debris Spent nuclear fuel leaching fuel debris Nuclear Energy and Engineering 13. Climate action 0202 electrical engineering electronic engineering information engineering Environmental science Leaching (metallurgy) spent nuclear fuel 0105 earth and related environmental sciences |
| Zdroj: | J.Nucl.Sci.Tech. J.Nucl.Sci.Tech., 2021, pp.1-24. ⟨10.1080/00223131.2021.1966347⟩ J.Nucl.Sci.Tech., 2021, 59 (1), pp.1-24. ⟨10.1080/00223131.2021.1966347⟩ |
| DOI: | 10.1080/00223131.2021.1966347⟩ |
| Popis: | International audience; Following the NPP accident, several hundred tons of heat-generating corium and fuel debris have been cooled permanently by millions of m3 of flowing. Knowledge on the interaction with water is crucial for any decommissioning planning.Starting from knowledge on the evolutions of the accident in the three reactor cores and associated fuel debris formations and some additional isotopic and physio-chemical information on debris fragments collected in Fukushima soils, we review the temporal evolution of the chemistry and leached radionuclide contents of the cooling water, comparing measured concentration ratios of the actinides and fission products in the water to reported results of laboratory leaching studies with either spent nuclear fuel or simulated fuel debris.As for spent fuel leaching, the fractions of inventories of 134,137Cs in the cooling water are orders of magnitude larger than that of the actinides. After more than 10 years of fuel debris/water contact, 137Cs release rates have decreased by about a factor of 100. The total release of actinides from the fuel debris is orders of magnitude lower than that of 134,137Cs or of 90Sr. This high stability makes direct disposal of fuel debris in suitable containers after decommissioning a viable option. |
| Databáze: | OpenAIRE |
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