A model was developed for steady-state steam generator analysis for purposes of continuous on-line data validation, plant state verification, and fault identification. The basic features of this model are as follows:

  1. The water (steam) temperature in the subcooled and superheater regions is written as a quadratic function of enthalpy and the system equations are solved analytically.
  2. The same equations are also solved analytically in the nucleate and film boiling regions.
  3. The departure from nucleate boiling quality is determined from the iterative solution of a transcendental equation.
These features allow the use of large nodes in each region and the direct determination of the region boundaries. Applications to typical steam generator problems showed computation times of 0.025 s. The analysis of four Energy Technology Engineering Center experiments showed very good agreement between model predictions and measurements.