An Evaluation Methodology Development and Application Process for Severe Accident Safety Issue Resolution

Table 6

Dominant Severe Accident Phenomena.

Process or Phenomena
Break size
Zr-H2O oxidation multiplier
Fuel melt temperature
Control rod melt temperature
Porosity of fuel debris beds
Opening of the PDS valves
Lower head damage fraction for failure
Flat plate CHF Kutateladze #
Steaming rate
PAR capacity scale factor
PAR threshold for operation