simulation of molten coreconcrete interaction in oxide

Simulation of Molten Core-Concrete Interaction in Oxide ...

the simulation of Molten Core-Concrete Interaction (MCCI) for reactor safety analysis. Attention focuses here on the validation of TOLBIAC-ICB in configurations expected to be representative of the long term phase of MCCI i.e. during an interaction between an oxide/metal stratified corium melt and a concrete structure. Up to now the BETA tests

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Simulation of Molten Core-Concrete Interaction in Oxide ...

Jul 01, 2006  Simulation of Molten Core-Concrete Interaction in Oxide/Metal Configuration with the TOLBIAC-ICB Code Application to the BETA Experiments

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Simulation of Molten Corium Concrete Interaction in a ...

In the late phase of Molten Core Concrete Interaction (MCCI) the ablation rate becomes low and the gas flow rate issued from the concrete decomposition is reduced. Moreover the oxide phase becomes lighter than the metal phase due to the addition of the light oxide from the concrete.

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Simulation of Molten Corium Concrete Interaction in a ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): In the late phase of Molten Core Concrete Interaction (MCCI) the ablation rate becomes low and the gas flow rate issued from the concrete decomposition is reduced. Moreover the oxide phase becomes lighter than the metal phase due to the addition of the light oxide from the concrete.

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CFD APPROACH TO MODELING OF CORE-CONCRETE

simulation of molten core-concrete interaction is described in [3]. The developed software corresponds to modern level of development of computers and takes into account all phenomenology of molten core concrete interaction and allows to simulate such phenomena and processes as:

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Simulation of corium concrete interaction in 2D geometry ...

Jan 01, 2010  Molten Core Concrete Interaction (MCCI) then occurs, characterized by concrete ablation. The main question that has to be addressed is whether and when the corium will make its way through the basemat since it would lead to a failure of the containment.

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Simulation of MCCI with the TOLBIAC-ICB code based on the ...

Oct 01, 2006  The results of the simulation of MCCI test ACE-L5, with a limestone-common sand concrete basemat and a large interaction time, is presented on Fig. 3. The mass inventory used in the simulation is the following (60 kg UO 2 , 11 kg ZrO 2 , 25 kg Fe 2 O 3 , 2 kg NiO, 6 kg Cr 2 O 3 ).

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CFD APPROACH TO MODELING OF CORE-CONCRETE

simulation of molten core-concrete interaction is described in [3]. The developed software corresponds to modern level of development of computers and takes into account all phenomenology of molten core concrete interaction and allows to simulate such phenomena and processes as:

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Simulation of corium concrete interaction in 2D geometry ...

Jan 01, 2010  A detailed review of the MCCI models and codes was recently made (Allelein and Bürger, 2006).A short presentation of the codes was also given in a paper presenting the COMET-L2-L3 benchmark (Spindler et al., 2007a).Hence only some elements are given here: in Table 1 the list of organisations with codes used for the different benchmarks and references; in Table 2 main features

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Molten core/Concrete Interaction MCCI Project FP3 ...

During the interaction of the molten core material with the concrete floor aerosols may be generated by evaporation from the hot melt surface and by the mechanical agitation of sparging gases, which contributes to the increase of the radioactive source term. ... The project includes the experimental investigation and the numerical simulation of ...

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Molten core/Concrete Interaction MCCI Project FP3 ...

Dec 01, 1992  During the interaction of the molten core material with the concrete floor aerosols may be generated by evaporation from the hot melt surface and by the mechanical agitation of sparging gases, which contributes to the increase of the radioactive source term. The project includes the experimental investigation and the numerical simulation of the ...

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5.3. Phenomena that could lead to delayed containment ...

failure: Molten Core-Concrete Interaction (MCCI) 5.3.1. Introduction In the event of reactor-vessel failure during a core melt accident, the corium result - ing from this core melt and the melting of internal structures will pour onto the reac-tor pit basemat. Contact between corium and concrete leads to what is called Molten Core-Concrete ...

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FUKUSHIMACORE MELTCOMPOSITION SIMULATION

a Molten Core Concrete Interaction (MCCI), 2. very few measurements are available for comparison with the simulation results and understanding will remain partial until additional information is obtained from the plant decommissioning. Based on Pressurized Water Reactor (PWR) experience at IRSN (there is no BWR operated in France), it

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Simulation on mass transfer at immiscible liquid interface ...

Jun 01, 2020  Because the molten oxide like UO 2 is denser than the molten metal such as steel and sinks, the molten metal floats on the upper layer as shown in Fig. 1. In addition, the denser molten oxide especially UO 2, has high decay power and temperature would heat the concrete.

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The WECHSL Code: A Computer Program for the Interaction

standing of the phenomena occuring during the interaction of a molten pool with concrete. As far as possible, the code is capable to treat both the limited type of simulation experiments with non-radioactive materials and melt masses between 100 and 600 kg as well as hypothetical core melt down accidents with actual, full scale reactor dimensions.

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Thermodynamic evaluation of the solidification phase of ...

The solidification phases of molten coreconcrete under the estimated molten – core– concrete interaction (MCCI) conditions in the Fukushima Daiichi Nuclear Power Plant Unit 1 were predicted using the thermodynamic equilibrium calculationtool, FactSage 6.2, and the

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Research Approach of MCCI products characterization for ...

and Fe-Si alloy would be detected in non-oxide layer. - Chemical form of the crust around molten pool was estimated on Scheil model. Typical components are (U,Zr)O 2 and CaAl 2Si 2O8. The amount of (U,Zr)SiO 4 increases with oxidation. None 5. Current and

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PSAM13 Conference Paper, Important Considerations in ...

13th International Conference on Probabilistic Safety Assessment and Management (PSAM 13) 2~7 October, 2016 • Sheraton Grande Walkerhill • Seoul, Korea • psam13 1 IMPORTANT CONSIDERATIONS IN SELECTING A SIMULATION END-TIME IN LEVEL 2 PSA

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Annals of Nuclear Energy - Europa

A Molten Core–Concrete Interaction experimental program is underway at the VULCANO facility. It is devoted to the study of 2Dlong-term dryMCCIwith eitherpurelyoxidic prototypic corium or with stratified oxide and metal layers (Journeau et al., 2007b). The VULCANO facility

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SNA+MC 2010 PNST Paper Template

MCCI simulation code: TOLBIAC-ICB, developed by CEA and IRSN [5]. In this study, stratification of the molten pool into oxide layer and metallic layer based on SEBALI criteria is taken into consideration [6]. Conversely, water ingression into surface crust and melt eruption from the molten pool to water, which accelerate cooling of the

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Simulation of the cracking and ablation behavior of ferro ...

Oct 13, 2016  HECLA Experiments on Interaction between Metallic Melt and Hematite-containing Concrete[J]. Nucl. Eng. Des., 2010, 240: 3586–3593. Article Google Scholar [13] Journeau C, Bonnet JM, Boccaccio E, et al. European Experiments on 2-D Molten Core Concrete Interaction: HECLA and VULCANO[J]. Nucl. Tech., 2010, 170: 189–200

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Molten core/Concrete Interaction MCCI Project FP3 ...

Dec 01, 1992  During the interaction of the molten core material with the concrete floor aerosols may be generated by evaporation from the hot melt surface and by the mechanical agitation of sparging gases, which contributes to the increase of the radioactive source term. The project includes the experimental investigation and the numerical simulation of the ...

get price

Molten core/Concrete Interaction MCCI Project FP3 ...

During the interaction of the molten core material with the concrete floor aerosols may be generated by evaporation from the hot melt surface and by the mechanical agitation of sparging gases, which contributes to the increase of the radioactive source term. ... The project includes the experimental investigation and the numerical simulation of ...

get price

PSAM13 Conference Paper, Important Considerations in ...

13th International Conference on Probabilistic Safety Assessment and Management (PSAM 13) 2~7 October, 2016 • Sheraton Grande Walkerhill • Seoul, Korea • psam13 1 IMPORTANT CONSIDERATIONS IN SELECTING A SIMULATION END-TIME IN LEVEL 2 PSA

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Research Approach of MCCI products characterization for ...

and Fe-Si alloy would be detected in non-oxide layer. - Chemical form of the crust around molten pool was estimated on Scheil model. Typical components are (U,Zr)O 2 and CaAl 2Si 2O8. The amount of (U,Zr)SiO 4 increases with oxidation. None 5. Current and

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Thermodynamic evaluation of the solidification phase of ...

The solidification phases of molten coreconcrete under the estimated molten – core– concrete interaction (MCCI) conditions in the Fukushima Daiichi Nuclear Power Plant Unit 1 were predicted using the thermodynamic equilibrium calculationtool, FactSage 6.2, and the

get price

Simulation of the cracking and ablation behavior of ferro ...

Oct 13, 2016  HECLA Experiments on Interaction between Metallic Melt and Hematite-containing Concrete[J]. Nucl. Eng. Des., 2010, 240: 3586–3593. Article Google Scholar [13] Journeau C, Bonnet JM, Boccaccio E, et al. European Experiments on 2-D Molten Core Concrete Interaction: HECLA and VULCANO[J]. Nucl. Tech., 2010, 170: 189–200

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Journal of Physics: Conference ... - Institute of Physics

MCCI experiment simulation with MPS method as future study, which will be able to simulate anisotropic ablation of concrete. 1. Introduction In a postulated severe accident of a light water reactor (LWR), behavior of core melt (mixture of molten core and structural materials) determines progression and consequence of the accident. While

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The WECHSL Code: A Computer Program for the Interaction

standing of the phenomena occuring during the interaction of a molten pool with concrete. As far as possible, the code is capable to treat both the limited type of simulation experiments with non-radioactive materials and melt masses between 100 and 600 kg as well as hypothetical core melt down accidents with actual, full scale reactor dimensions.

get price

SNA+MC 2010 PNST Paper Template

MCCI simulation code: TOLBIAC-ICB, developed by CEA and IRSN [5]. In this study, stratification of the molten pool into oxide layer and metallic layer based on SEBALI criteria is taken into consideration [6]. Conversely, water ingression into surface crust and melt eruption from the molten pool to water, which accelerate cooling of the

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PRELIMINARY METHODOLOGY FOR THE ANALYSIS OF THE

The FP release rate from the debris bed could be provided by MELCOR through the cavity package (CAV). This package models the interaction of molten fuel with the structures and concrete outside of the reactor vessel and is capable of handling aluminum, silicon, uranium, aluminum oxide, silicon oxide, and uranium oxide (UO 2 and U 3 O 8) systems.

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Recent Progress in Phenomenology, Analysis, and Accident ...

The report entitled, “State-of-the-Art Report on Molten-Corium-Concrete interaction and Ex-Vessel Molten-Core Coolability,” NEA/CSNI/R(2016)15, was completed in April 2016. The high level objective of this presentation is to summarize major findings from this report. 2/16

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Simulation of Ex-Vessel Melt Jet Breakup and Sensitivity ...

a coolable debris bed or makes an agglomerated melt lump that leads to inefficient cooling and the molten core concrete interaction (MCCI)[1, 2]. ... is a fuel-coolant interaction (FCI) simulation code developed at Japan Atomic Energy Agency (JAEA) and available at OECD/NEA Dababank. ... Oxide melt surfaces with relatively high emissivity, ∼0 ...

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Melt Coolability and Concrete Interaction (MCCI) Program

• The core-concrete interaction is allowed to proceed to 30 cm of ablation in either the radial or axial directions. - Objective is to obtain data on radial/axial power split during core-concrete interaction. • Thereafter, the melt is flooded to obtained debris coolability data following late-phase flooding.

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The COMET-L2 Experiment on Long-Term MCCI with Steel Melt

Former results in the molten-core-concrete interaction (MCCI) research indicate a possible penetration of a PWR cavity during a severe accident. To investigate the coolability of molten core the COMET facility was commissioned. The LACOMERA project is a 3 year shared-cost action within the Fifth Framework Programme.

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