A Super Critical Water Reactor (SCWR) single channel analysis model was built considering energy coupling between water rods and coolant channels. By using this model, a comparative study was performed on SCWR fuel assembly arrangement such as the size and location of water rods and fuel pins. Cladding temperature, pellet centerline temperature, and coolant core-outlet velocity were selected as comparison criteria. Preliminary core conceptual design of 1000 MWe SCWR was carried out and two sets of main parameters for SCWR core were proposed.

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