Quenching Experiments: Coolability of Debris Bed

Rashid, M. T.; Rahman, Saidur; Kulenovic, Rudi; Bürger, M.; Laurien, Eckart

doi:10.13182/nt13-a15768

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Both top and bottom flooding were investigated in POMECO and DEBRIS with volumetric induction heating, which required a number of technical innovations to ensure a near-to-uniform temperature profile across the debris bed diameter. DEBRIS analytical tests (Kulkarni et al, 2010;Rashid et al, 2011) complement the PEARL experiments by including top and side water injection and considering irregular shape particles (representative of TMI-2 debris), higher pressures and temperatures. In the DEBRIS tests with irregular particle sizes (steel screws 3 mm head diameter × 10 mm length, and steel cylinders 3 × 5.75 mm), the quenching behaviour showed pronounced multi-dimensional features.…”

Section: Formation and Cooling Of Debris Bedsmentioning

confidence: 99%

Recent severe accident research synthesis of the major outcomes from the SARNET network

Dorsselaere

Auvinen

Beraha

et al. 2015

Nuclear Engineering and Design

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The SARNET network (Severe Accident Research NETwork of excellence), co-funded by the European Commission from 2004 to 2013, has allowed to significantly improve the knowledge on severe accidents and to disseminate it through courses and ERMSAR conferences. The major investigated topics, involving more than 250 researchers from 22 countries, were in- and ex-vessel corium/debris coolability, molten-core–concrete-interaction, steam explosion, hydrogen combustion and mitigation in containment, impact of oxidising conditions on source term, and iodine chemistry. The ranking of the high priority issues was updated to account for the results of recent international research and for the impact of Fukushima nuclear accidents in Japan. In addition, the ASTEC integral code was further developed to capitalize the new knowledge. The network has reached self-sustainability by integration in mid-2013 into the NUGENIA Association. The main activities and outcomes of the network are presented

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Section: Formation and Cooling Of Debris Bedsmentioning

confidence: 99%

Recent severe accident research synthesis of the major outcomes from the SARNET network

Dorsselaere

Auvinen

Beraha

et al. 2015

Nuclear Engineering and Design

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“…The analysis of data on degraded core reflooding indicates that major gaps in knowledge till remain in the areas of debris and molten pool. To address these issues, POMECO (KTH) [4] and DEBRIS (IKE) [5] analytical experiments with debris beds are performed to support the quantification of basic laws and coolability behaviour. Top and bottom flooding (quenching) of hot debris (up to 900 • C) can be investigated in the DEBRIS facility, also at elevated pressures.…”

Section: Corium and Debris Coolabilitymentioning

confidence: 99%

The European Research on Severe Accidents in Generation-II and -III Nuclear Power Plants

Dorsselaere

Auvinen

Beraha

et al. 2012

Science and Technology of Nuclear Installations

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Forty-three organisations from 22 countries network their capacities of research in SARNET (Severe Accident Research NETwork of excellence) to resolve the most important remaining uncertainties and safety issues on severe accidents in existing and future water-cooled nuclear power plants (NPP). After a first project in the 6th Framework Programme (FP6) of the European Commission, the SARNET2 project, coordinated by IRSN, started in April 2009 for 4 years in the FP7 frame. After 2,5 years, some main outcomes of joint research (modelling and experiments) by the network members on the highest priority issues are presented: in-vessel degraded core coolability, molten-corium-concrete-interaction, containment phenomena (water spray, hydrogen combustion…), source term issues (mainly iodine behaviour). The ASTEC integral computer code, jointly developed by IRSN and GRS to predict the NPP SA behaviour, capitalizes in terms of models the knowledge produced in the network: a few validation results are presented. For dissemination of knowledge, an educational 1-week course was organized for young researchers or students in January 2011, and a two-day course is planned mid-2012 for senior staff. Mobility of young researchers or students between the European partners is being promoted. The ERMSAR conference is becoming the major worldwide conference on SA research.

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“…For higher bed porosity compositions (38% porosity, mean particle size 1 mm), the gas injection led to increased quenching times even though the countercurrent flow limitation was not reached [6]. In previous studies at the IKE's test facility DEBRIS (diameter/ height of test section 150/600 mm), quenching experiments were carried out by Sch€ afer and Groll [8] and Rashid et al [9] for topand bottom-flooding configurations with various initial particle bed temperatures and various particle bed configurations (monoand polydispersed beds) focusing mainly on the phenomenology of quenching. In further studies, various downcomer configurations (closed, open, perforated) and the influence of higher system pressure were investigated by Leininger et al [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Debris Bed Quenching With Additional Non-Condensable Gas Injection

Petroff

Kulenovic

Starflinger

2022

Journal of Nuclear Engineering and Radiation Science

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Severe accidents of light water reactors with core degradation can lead to the formation of a, so-called, debris bed inside the reactor cavity. In the scenario of depleted residual water, the bed can partially melt and interact with the concrete underneath generating non-condensable gases (NCG) at the bottom of the particle bed, which will flow through the debris bed. The impact of additional gas on the quenching process can in principle be considered in thermal-hydraulic system codes like ATHLET, however there is still a need for experimental validation of respective models or verification of corresponding simulation results. Therefore, especially for the model validation of COCOMO-3D, which is implemented in ATHLET, a specific extension to the existing experimental database is required. Experimental results of the quenching behaviour of a monodispersed particle bed at topflooding cooling condition, utilizing the new built-up test facility FLOAT, are presented.

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Quenching Experiments: Coolability of Debris Bed

Cited by 7 publications

References 6 publications

Recent severe accident research synthesis of the major outcomes from the SARNET network

Recent severe accident research synthesis of the major outcomes from the SARNET network

The European Research on Severe Accidents in Generation-II and -III Nuclear Power Plants

Experimental Investigation on Debris Bed Quenching With Additional Non-Condensable Gas Injection

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