FARO tests corium-melt cooling in water pool: Roles of melt superheat and sintering in sediment

Hwang, Gisuk; Kaviany, Massoud; Moriyama, Kiyofumi; Park, Hyun Sun; Hwang, Byoungcheol; Lee, Mooneon; Kim, Eunho; Park, Jin Ho; Nasersharifi, Yahya

doi:10.1016/j.nucengdes.2016.05.039

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…It was more than 50%. From these information, the agglomerate in L28 was not a densely packed solid but loosely connected, or sintered particles [27]. Simulating such kind of porous body formation and assessment of its coolability probably need modeling with another level of details.…”

Section: Faro Experimentsmentioning

confidence: 99%

Simulation of melt jet breakup experiments by JASMINE with an empirical correlation for melt particle size distribution

Moriyama

Park

2016

Journal of Nuclear Science and Technology

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We modified JASMINE code, a fuel-coolant interaction simulation code developed at Japan Atomic Energy Agency (JAEA), to extend the applicability for ex-vessel melt coolability assessment. The modification included addition of a melt particle size distribution model based on an empirical correlation and a simple non-local radiation heat transfer model, improvement in the treatment of melt particle generation, and re-agglomeration of settled particles. The modified code was tested by simulating melt jet breakup experiments, namely selected cases of ALPHA/GPM series with alumina-zirconia mixture and steel melt by JAEA, and FARO experiments with urania-zirconia mixture by Joint Research Center Ispra. Simulation results showed that the code reproduces the experimental results well for the cases with a deep subcooled water pool where the melt breaks up completely. On the other hand, significant underestimation of heat removal from the melt and overestimation of agglomeration of settled melt was encountered for conditions with a shallow or saturation temperature water pool. The melt agglomeration behavior in the simulation was sensitive to model parameters on the agglomeration criterion and heat transfer depending on conditions.

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Section: Faro Experimentsmentioning

confidence: 99%

Simulation of melt jet breakup experiments by JASMINE with an empirical correlation for melt particle size distribution

Moriyama

Park

2016

Journal of Nuclear Science and Technology

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“…5 Many experimental series like QUEOS and PREMIX were conducted to study the consequences of an In-vessel steam explosion. 6 With an objective to study the micro-interaction in the steam explosion and limit the explosivity in prototypic conditions, many experiments (FARO, 7,8 KROTOS, 9 TROI, 10 etc. ), with simulant materials were carried out.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on melt coolability with simulated decay heat—The influence of delay time in flooding

2021

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The primary objective of core catchers is to minimize the potential risk of core meltdown by stabilization and cooling of molten corium within the reactor containment for a prolonged period by strategically cooling it. Quenching of the high-temperature melt by top flooding strongly depends on the timing of injection of the cooling water, that is, immediate flooding or delayed flooding. To understand this aspect, we conducted experiments in a simulated core catcher of an Indian advanced nuclear reactor. In the experiments, sodium borosilicate glass, as a mixture of corium and sacrificial material simulant, was melted at about 1200°C and cooled by water from the side of a simulated core catcher and then flooding at the top of the melt pool. Two experiments were conducted; the first one was done with immediate flooding at the top of the melt pool; the second was performed with delayed top flooding of 45 min gap. The results show that immediate flooding quenches the melt pool rapidly compared to delayed flooding. A stable crust formation at the top of the melt pool and wall adhesion is observed in the delayed flooding. It was also found that no ingression of the water in the molten pool occurred with delayed flooding. On the other hand, with immediate flooding, water was found to ingress into the melt pool due to gap formations between melt and core catcher sidewall, causing the melt to break up through eruption by ingressed water. This phenomenon resulted in the formation of sand-type debris and in faster melt cooling.

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Numerical Analysis of Ferro-Alumino-Zirconium Particle Sedimentation Under Passive Waste Pre-treatment Scenario

Evidente

Almendrala

Tizon

et al. 2023

Springer Proceedings in Earth and Environmental Sciences

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FARO tests corium-melt cooling in water pool: Roles of melt superheat and sintering in sediment

Cited by 9 publications

References 28 publications

Simulation of melt jet breakup experiments by JASMINE with an empirical correlation for melt particle size distribution

Simulation of melt jet breakup experiments by JASMINE with an empirical correlation for melt particle size distribution

Experimental investigations on melt coolability with simulated decay heat—The influence of delay time in flooding

Numerical Analysis of Ferro-Alumino-Zirconium Particle Sedimentation Under Passive Waste Pre-treatment Scenario

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