Corium behavior

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In- and Ex-Vessel Corium Behavior

Objectives

  • Development of in- and ex-vessel corium cooling and stabilization technology for the evaluation and enhancement of severe accident management strategy
  • Verification experiment for EU-APR1400 core catcher design
  • Experiment and analysis on penetration failure in reactor lower vessel
  • Experiment and analysis on ex-vessel steam explosion
  • Experiment and analysis on ex-vessel corium cooling and stabilization
  • Evaluation of severe accident management strategy related with in- and ex-vessel corium cooling

R&D Status

  • VESTA (Verification of Ex-vessel corium STAbilization) and VESTA-S (Small) test facility
  • Jet impingement and sacrificial material interaction test for EU-APR1400 core catcher
  • Reactor lower vessel penetration (ICI) failure test under ERVC condition for APR1400
  • Reactor lower vessel penetration (ICM-GT and CRGT) failure test for Fukushima Daiichi NPP
  • Ex-vessel particulate bed spreading and cooling test for operating Korean NPPs
VESTA
  • TROI (Test for Real cOrium Interaction with water) test facility
  • Operating agent for OECD/SERANA program with 12 member organizations during 2007 ~ 2012
  • Ex-vessel steam explosion experiment with free fall and under submerged reactor vessel condition
VESTA5
  • Development of analysis code and evaluation of SAMG efficacy
  • Transient in-vessel corium behavior analysis code (SIMPLE)
  • Reactor lower vessel penetration failure analysis code (PENTAP+)
  • MELCOR analysis against severe accident scenarios for SAMG efficacy
VESTA3

Simple

VESTA4

Pentap+

VESTA1
VESTA2

Melcor Analysis

Outcomes & Perspectives

  • Test data for in- and ex-vessel corium behavior
  • Analysis code for in- and ex-vessel corium behavior
  • Contribution to the modification of SAMG