%0 Conference Paper %F Oral %T Needs for large mass prototypic corium experiments the PLINIUS-2 platform %+ CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)) %A Journeau, C. %A Buffe, L. %A Haquet, J.-F. %A Piluso, P. %A Willermoz, G. %Z PLINIUS 2 has a support from a large array of CEA Cadarache engineers and technicians whichare all warmly thanked. %Z Part of the work for PLINIUS-2 is funded by the Investments for the Future enacted by theFrench parliament in 2010 %< avec comité de lecture %B NURETH 2015 - 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics %C Chicago, United States %I ANS %8 2015-08-30 %D 2015 %K Corium %K Experimental Facility %K Prototypic Material %K Scaling %K Severe Accidents %Z Physics [physics]/Nuclear Experiment [nucl-ex] %Z Physics [physics]/Nuclear Theory [nucl-th]Conference papers %X Corium is the molten material formed after meltdown of a nuclear reactor core during a severe accident. In order to improve the understanding and modelling of corium behavior, experiments are needed both for LWRs and GenIV fast reactors. Experiments using low temperature simulant materials, thanks to lower costs and constraints, allow the testing of a larger number of configurations and the determination of correlations. But some crucial corium phenomena cannot be reproduced at low temperatures such as the importance of radiation heat transfer or the presence of a large (up to 1000 K) liquidus-solidus interval. Consequently, some experiments are performed with high temperature simulant materials alumina thermite as well as refractory oxides. However, it is not feasible to simulate all the aspects of corium phenomenology, especially its high temperature physico-chemistry. Therefore, even though the use of depleted uranium implies a series of protective and regulatory measures, the need for prototypic corium experimented is supported through several examples Another important aspect of experiment design deals with scaling. Small or medium scale corium experiments are easier to operate and only a few large scale (>100 kg) facilities have been built. Several effects are only visible with significant masses, as for instance, the formation of a corium cake during FCI or all the phenomena controlled by crust strength, such as underwater spreading or corium jet ablation. CEA is currently designing a new large prototypic corium platform PLINIUS-2 for both LWR and SFR corium experimental research. Its main characteristics will be presented. %G English %2 https://cea.hal.science/cea-02509240/document %2 https://cea.hal.science/cea-02509240/file/201500001391.pdf %L cea-02509240 %U https://cea.hal.science/cea-02509240 %~ CEA %~ DEN