Experimental and numerical study of stratification and solidification/ melting behaviors

Gen Li, Yoshiaki Oka, Masahiro Furuya

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Given the severe accident of a light water reactor (LWR), stratification and solidification/melting are important phenomena in melt corium behavior within the reactor lower head, influencing the decay heat distribution and ablation of penetration tube and vessel wall. Numerical calculation is a necessary and effective approach for mechanistic study of local melt corium behavior. In this study, the improved moving particle semi-implicit (MPS) method was applied for investigating the stratification and solidification/melting phenomena. The implicit viscous term calculation technique and stability improvement technique were adopted to enable MPS to simulate the stratification process of materials with high viscosity in phase transition stage. The solid-liquid phase transition model was also coupled with MPS method. The validation experiment was carried out with low-melting-point metal tin and NeoSK-SALT. The layer configurations and temperature profiles obtained from MPS calculation showed good agreement with the experimental results. Meanwhile, the calculation results indicated that the material freezing behavior could affect the layer formation, and the layer configurations also significantly influenced the temperature profiles and heat flux distributions. The present results demonstrated that MPS method has the capacity to understand the local melt behavior in detail that is relevant to stratification and phase transition.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
JournalNuclear Engineering and Design
Volume272
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Fingerprint

solidification
stratification
Solidification
Melting
melting
phase transition
Phase transitions
melt
temperature profile
temperature profiles
Light water reactors
Tin
light water reactors
Ablation
Freezing
Melting point
Heat flux
Accidents
accidents
configurations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

Cite this

Experimental and numerical study of stratification and solidification/ melting behaviors. / Li, Gen; Oka, Yoshiaki; Furuya, Masahiro.

In: Nuclear Engineering and Design, Vol. 272, 01.01.2014, p. 109-117.

Research output: Contribution to journalArticle

@article{7b0b7cd772314fe3a6ed8ba533ce01da,
title = "Experimental and numerical study of stratification and solidification/ melting behaviors",
abstract = "Given the severe accident of a light water reactor (LWR), stratification and solidification/melting are important phenomena in melt corium behavior within the reactor lower head, influencing the decay heat distribution and ablation of penetration tube and vessel wall. Numerical calculation is a necessary and effective approach for mechanistic study of local melt corium behavior. In this study, the improved moving particle semi-implicit (MPS) method was applied for investigating the stratification and solidification/melting phenomena. The implicit viscous term calculation technique and stability improvement technique were adopted to enable MPS to simulate the stratification process of materials with high viscosity in phase transition stage. The solid-liquid phase transition model was also coupled with MPS method. The validation experiment was carried out with low-melting-point metal tin and NeoSK-SALT. The layer configurations and temperature profiles obtained from MPS calculation showed good agreement with the experimental results. Meanwhile, the calculation results indicated that the material freezing behavior could affect the layer formation, and the layer configurations also significantly influenced the temperature profiles and heat flux distributions. The present results demonstrated that MPS method has the capacity to understand the local melt behavior in detail that is relevant to stratification and phase transition.",
author = "Gen Li and Yoshiaki Oka and Masahiro Furuya",
year = "2014",
month = "1",
day = "1",
doi = "10.1016/j.nucengdes.2014.02.023",
language = "English",
volume = "272",
pages = "109--117",
journal = "Nuclear Engineering and Design",
issn = "0029-5493",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Experimental and numerical study of stratification and solidification/ melting behaviors

AU - Li, Gen

AU - Oka, Yoshiaki

AU - Furuya, Masahiro

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Given the severe accident of a light water reactor (LWR), stratification and solidification/melting are important phenomena in melt corium behavior within the reactor lower head, influencing the decay heat distribution and ablation of penetration tube and vessel wall. Numerical calculation is a necessary and effective approach for mechanistic study of local melt corium behavior. In this study, the improved moving particle semi-implicit (MPS) method was applied for investigating the stratification and solidification/melting phenomena. The implicit viscous term calculation technique and stability improvement technique were adopted to enable MPS to simulate the stratification process of materials with high viscosity in phase transition stage. The solid-liquid phase transition model was also coupled with MPS method. The validation experiment was carried out with low-melting-point metal tin and NeoSK-SALT. The layer configurations and temperature profiles obtained from MPS calculation showed good agreement with the experimental results. Meanwhile, the calculation results indicated that the material freezing behavior could affect the layer formation, and the layer configurations also significantly influenced the temperature profiles and heat flux distributions. The present results demonstrated that MPS method has the capacity to understand the local melt behavior in detail that is relevant to stratification and phase transition.

AB - Given the severe accident of a light water reactor (LWR), stratification and solidification/melting are important phenomena in melt corium behavior within the reactor lower head, influencing the decay heat distribution and ablation of penetration tube and vessel wall. Numerical calculation is a necessary and effective approach for mechanistic study of local melt corium behavior. In this study, the improved moving particle semi-implicit (MPS) method was applied for investigating the stratification and solidification/melting phenomena. The implicit viscous term calculation technique and stability improvement technique were adopted to enable MPS to simulate the stratification process of materials with high viscosity in phase transition stage. The solid-liquid phase transition model was also coupled with MPS method. The validation experiment was carried out with low-melting-point metal tin and NeoSK-SALT. The layer configurations and temperature profiles obtained from MPS calculation showed good agreement with the experimental results. Meanwhile, the calculation results indicated that the material freezing behavior could affect the layer formation, and the layer configurations also significantly influenced the temperature profiles and heat flux distributions. The present results demonstrated that MPS method has the capacity to understand the local melt behavior in detail that is relevant to stratification and phase transition.

UR - http://www.scopus.com/inward/record.url?scp=84898423218&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898423218&partnerID=8YFLogxK

U2 - 10.1016/j.nucengdes.2014.02.023

DO - 10.1016/j.nucengdes.2014.02.023

M3 - Article

VL - 272

SP - 109

EP - 117

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

SN - 0029-5493

ER -