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The Printed Circuit Heat Exchanger is expected to dramatically improve the safety and economics of the Sodium-Cooled Fast Reactor (SFR) when it used as the steam generator. In this study, the thermal performance of the Printed Circuit Steam Generator (PCSG) and the pressure propagation by the Sodium-Water Reaction is numerically analyzed. Based on the stress calculation for the wall of flow channel and the 1D heat transfer analysis, the cross-section and length of PCSG is determined. The STAR-CCM+ is used to evaluate the thermal performance of designed PCSG. Although the flow maldistribution (~19%) exists in the feed water channels, the analyzed thermal power is around 26MW close the target thermal power. The SWR pressure propagation is analyzed by the SWAAM-II Code. There is no pressure propagation from the PCSG to the Intermediate Heat Transport System of the SFR due to the volume difference between the flow channel and header.