Hydraulic Design and Evaluation of the PHTS Mechanical Pump of PGSFR

The hydraulic parts of the primary pump for the Prototype Generation IV Sodium-Cooled Fast Reactor were designed at the Korea Atomic Energy Research Institute. The hydraulic parts, such as the impeller and diffuser, of the primary heat transfer system pump were designed to satisfy the hydraulic performance requirements. The essential geometric parameters of the impeller and diffuser were determined using optimal design methodology. To verify the performance of the pump, and to produce safety analysis input data, a scaled down model pump and test facility were designed and fabricated based on the scaling law. The hydraulic performance of model pump was tested in water under empirical, theoretical and conservative assumptions. The performance curve, net positive suction head curve and homologous curve were obtained from the model pump test facility. The hydraulic performance, with a rational design margin, was verified from the model pump test. (author)