Evaluation of an effective diameter to study quenching and dry-out of complex debris bed

N. Chikhi (Corresponding Author), O. Coindreau, L.X. Li, W.M. Ma, Veikko Taivassalo, Eveliina Takasuo, S. Leininger, R. Kulenovic, E. Laurien

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

Many of the current research works performed in the SARNET-2 WP5 deal with the study of the coolability of debris beds in case of severe nuclear power plant accidents. One of the difficulties for modeling and transposition of experimental results to the real scale and geometry of a debris bed in a reactor is the difficulty to perform experiments with debris beds that are representative for reactor situations. Therefore, many experimental programs have been performed using beds made of multi-diameter spheres or non-spherical particles to study the physical phenomena involved in debris bed coolability and to evaluate an effective diameter. This paper first establishes the ranges of porosity and particle size distribution that might be expected for in-core debris beds and ex-vessel debris beds. Then, the results of pressure drop and dry-out heat flux (DHF) measurements obtained in various experimental setups, POMECO, DEBRIS, COOLOCE/STYX and CALIDE/PRELUDE, are presented. The issues of particle size distribution and non-sphericity are also investigated. It is shown that the experimental data obtained in "simple" debris beds are relevant to describe the behavior of more complex beds. Indeed, for several configurations, it is possible to define an "effective" diameter suitable for evaluating (with the porosity) some model parameters as well as correlations for the pressure drop across the bed, the steam flow rate during quenching and the DHF.
Original languageEnglish
Pages (from-to)24-41
JournalAnnals of Nuclear Energy
Volume74
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed
Event6th European Review meeting on Severe Accident Research, ERMSAR-2013 - Avignon, France
Duration: 2 Oct 20134 Oct 2013
Conference number: 6

Fingerprint

Debris
Quenching
Particle size analysis
Pressure drop
Heat flux
Porosity
Nuclear power plants
Accidents
Steam
Flow rate
Geometry

Keywords

  • nuclear reactors
  • severe accidents
  • debris bed coolability
  • quenching
  • dry-out heat flux
  • effective diameter

Cite this

Chikhi, N. ; Coindreau, O. ; Li, L.X. ; Ma, W.M. ; Taivassalo, Veikko ; Takasuo, Eveliina ; Leininger, S. ; Kulenovic, R. ; Laurien, E. / Evaluation of an effective diameter to study quenching and dry-out of complex debris bed. In: Annals of Nuclear Energy. 2014 ; Vol. 74. pp. 24-41.
@article{69a30d334a0b4b478e07f32b850cabb0,
title = "Evaluation of an effective diameter to study quenching and dry-out of complex debris bed",
abstract = "Many of the current research works performed in the SARNET-2 WP5 deal with the study of the coolability of debris beds in case of severe nuclear power plant accidents. One of the difficulties for modeling and transposition of experimental results to the real scale and geometry of a debris bed in a reactor is the difficulty to perform experiments with debris beds that are representative for reactor situations. Therefore, many experimental programs have been performed using beds made of multi-diameter spheres or non-spherical particles to study the physical phenomena involved in debris bed coolability and to evaluate an effective diameter. This paper first establishes the ranges of porosity and particle size distribution that might be expected for in-core debris beds and ex-vessel debris beds. Then, the results of pressure drop and dry-out heat flux (DHF) measurements obtained in various experimental setups, POMECO, DEBRIS, COOLOCE/STYX and CALIDE/PRELUDE, are presented. The issues of particle size distribution and non-sphericity are also investigated. It is shown that the experimental data obtained in {"}simple{"} debris beds are relevant to describe the behavior of more complex beds. Indeed, for several configurations, it is possible to define an {"}effective{"} diameter suitable for evaluating (with the porosity) some model parameters as well as correlations for the pressure drop across the bed, the steam flow rate during quenching and the DHF.",
keywords = "nuclear reactors, severe accidents, debris bed coolability, quenching, dry-out heat flux, effective diameter",
author = "N. Chikhi and O. Coindreau and L.X. Li and W.M. Ma and Veikko Taivassalo and Eveliina Takasuo and S. Leininger and R. Kulenovic and E. Laurien",
year = "2014",
doi = "10.1016/j.anucene.2014.05.009",
language = "English",
volume = "74",
pages = "24--41",
journal = "Annals of Nuclear Energy",
issn = "0306-4549",
publisher = "Elsevier",

}

Chikhi, N, Coindreau, O, Li, LX, Ma, WM, Taivassalo, V, Takasuo, E, Leininger, S, Kulenovic, R & Laurien, E 2014, 'Evaluation of an effective diameter to study quenching and dry-out of complex debris bed', Annals of Nuclear Energy, vol. 74, pp. 24-41. https://doi.org/10.1016/j.anucene.2014.05.009

Evaluation of an effective diameter to study quenching and dry-out of complex debris bed. / Chikhi, N. (Corresponding Author); Coindreau, O.; Li, L.X.; Ma, W.M.; Taivassalo, Veikko; Takasuo, Eveliina; Leininger, S.; Kulenovic, R.; Laurien, E.

In: Annals of Nuclear Energy, Vol. 74, 2014, p. 24-41.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Evaluation of an effective diameter to study quenching and dry-out of complex debris bed

AU - Chikhi, N.

AU - Coindreau, O.

AU - Li, L.X.

AU - Ma, W.M.

AU - Taivassalo, Veikko

AU - Takasuo, Eveliina

AU - Leininger, S.

AU - Kulenovic, R.

AU - Laurien, E.

PY - 2014

Y1 - 2014

N2 - Many of the current research works performed in the SARNET-2 WP5 deal with the study of the coolability of debris beds in case of severe nuclear power plant accidents. One of the difficulties for modeling and transposition of experimental results to the real scale and geometry of a debris bed in a reactor is the difficulty to perform experiments with debris beds that are representative for reactor situations. Therefore, many experimental programs have been performed using beds made of multi-diameter spheres or non-spherical particles to study the physical phenomena involved in debris bed coolability and to evaluate an effective diameter. This paper first establishes the ranges of porosity and particle size distribution that might be expected for in-core debris beds and ex-vessel debris beds. Then, the results of pressure drop and dry-out heat flux (DHF) measurements obtained in various experimental setups, POMECO, DEBRIS, COOLOCE/STYX and CALIDE/PRELUDE, are presented. The issues of particle size distribution and non-sphericity are also investigated. It is shown that the experimental data obtained in "simple" debris beds are relevant to describe the behavior of more complex beds. Indeed, for several configurations, it is possible to define an "effective" diameter suitable for evaluating (with the porosity) some model parameters as well as correlations for the pressure drop across the bed, the steam flow rate during quenching and the DHF.

AB - Many of the current research works performed in the SARNET-2 WP5 deal with the study of the coolability of debris beds in case of severe nuclear power plant accidents. One of the difficulties for modeling and transposition of experimental results to the real scale and geometry of a debris bed in a reactor is the difficulty to perform experiments with debris beds that are representative for reactor situations. Therefore, many experimental programs have been performed using beds made of multi-diameter spheres or non-spherical particles to study the physical phenomena involved in debris bed coolability and to evaluate an effective diameter. This paper first establishes the ranges of porosity and particle size distribution that might be expected for in-core debris beds and ex-vessel debris beds. Then, the results of pressure drop and dry-out heat flux (DHF) measurements obtained in various experimental setups, POMECO, DEBRIS, COOLOCE/STYX and CALIDE/PRELUDE, are presented. The issues of particle size distribution and non-sphericity are also investigated. It is shown that the experimental data obtained in "simple" debris beds are relevant to describe the behavior of more complex beds. Indeed, for several configurations, it is possible to define an "effective" diameter suitable for evaluating (with the porosity) some model parameters as well as correlations for the pressure drop across the bed, the steam flow rate during quenching and the DHF.

KW - nuclear reactors

KW - severe accidents

KW - debris bed coolability

KW - quenching

KW - dry-out heat flux

KW - effective diameter

UR - https://www.sciencedirect.com/journal/annals-of-nuclear-energy/vol/74/suppl/C

U2 - 10.1016/j.anucene.2014.05.009

DO - 10.1016/j.anucene.2014.05.009

M3 - Article

VL - 74

SP - 24

EP - 41

JO - Annals of Nuclear Energy

JF - Annals of Nuclear Energy

SN - 0306-4549

ER -