Thermal consideration of CANDU-SCWR sliding pressure startup through subchannel analysis

A startup system and startup procedures are designed based on the subchannel analysis for CANDU-SCWR sliding pressure startup. Lookup tables are selected to predict the CHF and PDO heat transfer due to their wide application range. Plant parameters are analyzed in detail. The results show that the maximum cladding surface temperature can be well restricted lower than criterion (850 °C), and the proposed startup procedure is feasible for CANDU-SCWR from the point of view of thermal-hydraulics.