96/06057 The effects of unplanned power changes in a nuclear plant on fuel cycle costs
- Publisher
- Elsevier Science
- Year
- 1996
- Weight
- 189 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
When high enthalpy liquid is discharged into a containment, thermal fragmentation is a dominant mechanism for the dispersion of liquid into droplets. The current method for aemsol size estimation in the SMART code used for CANDU containment analysis, however, results in too small aerosol diameter because it considers only aerodynamic atomization with very fast discharging velocity. The smaller the aerosol diameter, the less is the effect of aerosol removal mechanisms. Therefore the amount of aerosol released into environment for some of the containment isolation failure cases and the resulting dose values are very conservative. Among several models to predict the drop diameter for a high enthalpy liquid jet, an appropriate model (Koestel, Gido and Lamkin model) has been selected for aerosol size calculation and incorporated in SMART code.