Quality improvements of thermodynamic data applied to corium interactions for severe accident modelling in SARNET2
In: Annals of Nuclear Energy, Jg. 74 (2014-12-01), S. 110-124
Online
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Zugriff:
International audience; In a severe accident transient, corium composition and its properties determine its behaviour and its potential interactions both with the reactor vessel and in the later phases with the concrete basemat. This, in turn, requires a detailed knowledge of the phases present at temperature and how they are formed. Because it implies mainly the investigation of chemical systems at high temperature, these data are often difficult to obtain or are uncertain if it already exists. Therefore more data are required both to complete the thermodynamic databanks (such as NUCLEA) and to construct accurate equilibrium phase diagrams and to finally contribute to the improvement of the codes simulating these severe accident conditions. The MCCI work package (WP6) of the SARNET 2 Network of Excellence has been addressing these problems. In this framework in large facilities such as VULCANO tests have been performed on the interactions and ablation of UO2-containing melts with concrete. They have been completed by large scale MCCI testing such EPICOR on vessel steel corrosion. In parallel in major EU-funded ISTC projects co-ordinated with national institutes, such as the CORPHAD and PRECOS, smaller, single effect tests have been carried out on the more difficult phase diagrams. These have produced data that can be directly used by databanks and for modelling improvement/validation. From these data significant advances in the melt chemistry and pool behaviour have been made. A selection of experiments from participating institutes are presented in this paper and give hindsight into the major processes and so give clear indications for the future work, especially in light of the Fukushima accident. © 2014 The Authors.
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Quality improvements of thermodynamic data applied to corium interactions for severe accident modelling in SARNET2
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Autor/in / Beteiligte Person: | Bechta, Sevostian ; Wiss, Thierry ; Kiselova, M. ; Khabensky, V.B. ; Barrachin, Marc ; Journeau, C. ; Sheindlin, M. ; Piluso, Pascal ; Bottomley, D. ; Manara, Dario ; Gusarov, V. V. ; Bakardjieva, Snejana ; Fischer, Manfred ; Brissonneau, Laurent ; Bezdička, Petr ; Dugne, Olivier ; Fischer, E. ; Cheynet, B. ; Tyrpekl, Vaclav ; European Commission - Joint Research Centre [Karlsruhe] (JRC) ; CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ; THERMODATA ; Thermodata ; Rez, UJV ; a.s. ; European Commission, Joint Research Centre, Institute for Transuranium Elements (ITU) ; Institut de Radioprotection et de Sûreté Nucléaire (IRSN) ; Istituto di Scienze e Tecnologie della Cognizione, ISTCEuropean Commission, ECEuropean Commission, EC |
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Zeitschrift: | Annals of Nuclear Energy, Jg. 74 (2014-12-01), S. 110-124 |
Veröffentlichung: | Elsevier BV, 2014 |
Medientyp: | unknown |
ISSN: | 0306-4549 (print) |
DOI: | 10.1016/j.anucene.2014.06.023 |
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