Three casings good, two casings better

Possible future applications of the 48in ISB technology include this 1000 MW tandem–compound turbine with two LP casings, each of which is identical to the LP turbine of Hirono 5



  • Steam_Turbine_15
  • The Hirono 5 two-casing USC steam turbine
  • Evolution of 600 MW steam design
  • Key features of the 600 MW two casing USC turbine, as employed at Hirono 5
  • The two-casing design is some 7.5m shorted than the conventional three-casing configuration
  • Advantages of ISB (integral shroud blade)
  • Application range of LP last blade
  • Evolution of high termperature turbines
  • Possible future applications of the 48in ISB technology include this 1000 MW tandem–compound turbine with two LP casings, each of which is identical to the LP turbine of Hirono 5
  • Another potential future application of the 48in ISB: single cylinder reheat turbine for combined cycle use
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