A multi-stage axial turbine (typically between 4 and 10 stages) designed to operate more efficiently with partial admission of low temperature steam in each stage except the last one or two stages. Each stage of the subject turbine operates efficiently with smaller pressure drops thereby maintaining much smaller reductions in fluid density per stage. Each stage has blisks built as a single piece and the steam passages built into the periphery of the blisks. Each subsequent stage then only requires a small increase in flow area that can be achieved by using only a small increase in admission and blade height.