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Benchmarking MELCOR 1.8.2 for ITER Against Recent EVITA Results.


DE2008924495

Publication Date 2007
Personal Author Merrill, B. J.
Page Count 66
Abstract A version of MELCOR 1.8.2 modified for use in ITER Preliminary Safety Report analyses was validated against recent data from the EVITA facility located in Cadarache, France. EVITA Test Series 7 was used for this study to verify MELCOR's ability to predict the pressures, temperatures, cryoplate ice mass, and vaccum vessel (VV) condensate mass for test conditions in EVITA that include injections of steam, nitrogen, and water in to the EVITA VV after the walls had been heated to 165 degrees C and the cryoplate had been cooled to -193 degrees C. In general, the ability of MELCOR to predict the VV pressure and wall temperatures for the steam only and water only injection tests was very good. Predicted ice layer masses where larger than reported for the EVITA cryoplate, in particular for the steam only injection tests (approx. 40% too high), and the predicted condensate masses were less that measured in EVITA. Both of these descrpancies can be explained by ice porosity. The modified MELCOR 1.8.2 over predicts the EVITA VV pressure for the co-injection tests (e.g., steam plus nitrogen, or water plus nitrogen injections) by almost a factor of two. Based on parametric runs that where made by increasing the predicted cryoplate condensation rate, it is believed that this pressure over prediction is a result of an under predicted cryoplate condensation rate.
Keywords
  • ITER tokamak
  • Condensates
  • Nitrogen
  • Porosity
  • Steam
  • Water
  • Forecasting
  • Safety
  • Benchmarks
  • MELCOR 1.8.2. computer code
Source Agency
  • Technical Information Center Oak Ridge Tennessee
Corporate Authors Idaho National Engineering Lab., Idaho Falls.; Department of Energy, Washington, DC.
Supplemental Notes Sponsored by Department of Energy, Washington, DC.
Document Type Technical Report
NTIS Issue Number 200820
Contract Number
  • DE-AC07-99ID-13727
Benchmarking MELCOR 1.8.2 for ITER Against Recent EVITA Results.
Benchmarking MELCOR 1.8.2 for ITER Against Recent EVITA Results.
DE2008924495

  • ITER tokamak
  • Condensates
  • Nitrogen
  • Porosity
  • Steam
  • Water
  • Forecasting
  • Safety
  • Benchmarks
  • MELCOR 1.8.2. computer code
  • Technical Information Center Oak Ridge Tennessee
  • DE-AC07-99ID-13727
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