Hyppää sisältöön
    • Suomeksi
    • På svenska
    • In English
  • Suomeksi
  • In English
  • Kirjaudu
Näytä aineisto 
  •   Etusivu
  • LUTPub
  • Tieteelliset julkaisut
  • Näytä aineisto
  •   Etusivu
  • LUTPub
  • Tieteelliset julkaisut
  • Näytä aineisto
JavaScript is disabled for your browser. Some features of this site may not work without it.

Pool stratification and mixing induced by steam injection through spargers: CFD modelling of the PPOOLEX and PANDA experiments

Gallego-Marcos, Ignacio; Kudinov, Pavel; Villanueva, Walter; Kapulla, Ralf; Paranjape, Sidharth; Paladino, Domenico; Laine, Jani; Puustinen, Markku; Räsänen, Antti; Pyy, Lauri; Kotro, Eetu (2019-03-29)

Katso/Avaa
gallego-marcos_et_al_pool_stratification_finaldraft.pdf (5.749Mb)
Huom!
Sisältö avataan julkiseksi
: 30.03.2021

Post-print / Final draft

Gallego-Marcos, Ignacio
Kudinov, Pavel
Villanueva, Walter
Kapulla, Ralf
Paranjape, Sidharth
Paladino, Domenico
Laine, Jani
Puustinen, Markku
Räsänen, Antti
Pyy, Lauri
Kotro, Eetu
29.03.2019

Nuclear Engineering and Design

347

67-85

Elsevier

School of Energy Systems

https://doi.org/10.1016/j.nucengdes.2019.03.011
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe20201214100477

Tiivistelmä

Spargers are multi-hole injection pipes used in Boiling Water Reactors (BWR) and Generation III/III+ Pressurized Water Reactors (PWR) to condense steam in large water pools. During the steam injection, high pool surface temperatures induced by thermal stratification can lead to higher containment pressures compared with completely mixed pool conditions, the former posing a threat for plant safety. The Effective Heat Source (EHS) and Effective Momentum Source (EMS) models were previously developed and validated for the modelling of a steam injection through blowdown pipes. The goal of this paper is to extend the EHS/EMS model capabilities towards steam injection through multi-hole spargers. The models are implemented in ANSYS Fluent 17.0 Computational Fluid Dynamics (CFD) code and calibrated against the spargers experiments performed in the PPOOLEX and PANDA facilities, analysed by the authors in Gallego-Marcos et al. (2018b). CFD modelling guidelines are established for the adequate simulation of the pool behaviour. A new correlation is proposed to model the turbulent production and dissipation caused by buoyancy. Sensitivity studies addressing the effect of different assumptions on the effective momentum magnitude, profile, angle and turbulence are presented. Calibration of the effective momentum showed an inverse proportionality to the sub-cooling. Differences between the effective momentum calibrated for PPOOLEX and PANDA are discussed. Analysis of the calculated flow above the cold stratified layer showed that the erosion of the layer is induced by the action of turbulence rather than mean shear flow.

Lähdeviite

Gallego-Marcos, I., Kudinov, P., Villanueva, W., Kapulla, R., Paranjape, S., Paladino, D., Laine, J., Puustinen, M., Räsänen, A., Pyy, L., Kotro, E. (2019). Pool stratification and mixing induced by steam injection through spargers: CFD modelling of the PPOOLEX and PANDA experiments. Nuclear Engineering and Design, vol. 347. pp. 67-85. DOI: 10.1016/j.nucengdes.2019.03.011

Kokoelmat
  • Tieteelliset julkaisut [723]
LUT-yliopisto
PL 20
53851 Lappeenranta
Ota yhteyttä | Lähetä palautetta | Tietosuoja | Saavutettavuusseloste
 

 

Tämä kokoelma

JulkaisuajatTekijätNimekkeetKoulutusohjelmaAvainsanatSyöttöajatYhteisöt ja kokoelmat

Omat tiedot

Kirjaudu sisäänRekisteröidy
LUT-yliopisto
PL 20
53851 Lappeenranta
Ota yhteyttä | Lähetä palautetta | Tietosuoja | Saavutettavuusseloste