Study of the Effect of Single-Phase Flow Conditions on FAC for Various Feeder Bend Geometries of Pressurized Heavy Water Reactor (PHWR)

Indian nuclear power program is currently based on indigenous pressurized heavy water reactors (PHWR). PHWR uses natural uranium as fuel eliminating the need for enrichment. PHWR is a pressure tube type reactor which means calandria is pierced by a large number of pressure tubes. These pressure tubes contain coolant at high pressure, while the moderator takes the rest of the space in calandria. Moderator and coolant (both heavy water, D2O) are having their separate circuits. The number of pressure tubes varies depending upon the power rating of the reactor. For the case of 540 MWe and 700 MWe number of pressure tubes are 392.