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Lumped Parameter, State Variable Dynamic Models For U-Tube Recirculation Type Nuclear Steam Generators, Mohamed Rabie Ahmed Ali

Doctoral Dissertations

A number of lumped parameter dynamic models were developed for a vertical U-tube recirculation steam generator (UTSG) of the type used in most pressurized water reactor nuclear steam supply systems.

The models ranged in complexity from a simplified model (Model A) with only three lumps to represent the primary fluid (reactor coolant), tube metal and the secondary fluid to a detailed model (Model D) with fourteen lumps and a moving boundary between the subcooled and boiling sections of the heat exchange region. The models are linear and are in the state variable form which is convenient for using standard general …