Abstract
Possible configurations for Power Conversion System (PCS) for a futuristic, small, pulsed Spherical Tokamak (ST) fusion reactor are presented. For the typical blanket coolant choices namely, helium and water, an intermediate heat-exchanger (IHX) cum buffer energy storage system (ESS) with Molten Salt (MS) is introduced to examine Rankine and Brayton cycle’s effectiveness. Preliminary thermal sizing of the involved heat-exchangers and parameters of the optimized cycle are discussed. S-CO2 Brayton cycle seems to be a promising candidate for efficient power conversion for a pulsed plasma reactor with efficiency of 42.75%. Rankine cycle yields efficiency of 35–42% depending on water/helium as the choice of the blanket coolant.
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