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Continuously Coupled Blades (CCB)



Hitachi has developed a series of Advanced Last Stage Turbine Blades to improve the reliability & competitiveness of thermal & nuclear power plants.

 

Features:
 
  • High Reliability
  • Mono-Block Blade with Interlocking Integral Cover
  • Elimination of the Tie-Wires & Tie-Wire Holes
  • “Drop-In” Replacements for GE Units
  • No Replacement of Diaphragms or Modifications to Existing Components Required for Most Applications
  • Redesigned Transonic Blade Profile
  • 8% Stage Efficiency Increase
  • Improved Backpressure Limitation

More information on Long Blade Technology can be found at:
http://www.power-hitachi.com/solution/index.htm

35 rows currently installed on Hitachi and GE units in North America. 18 rows installed on GE Units in the United States including:

  • LG&E, Cane Run No. 4
  • LG&E, Trimble County No. 1
  • APS, Four Corners No. 1, No. 2
  • KU, Ghent No. 1
  • Xcel Energy, Highbridge No. 6
  • Alliant, Edgewater No. 4
 

New Brunswick Power – Coleson Cove Unit No. 3
 
  • Hitachi 350 MW Steam Turbine
  • 4 Rows of 26” L-0 CCB Buckets

 

Alliant Energy – Edgewater No. 4
 
  • GE 330 MW Steam Turbine
  • 2 Rows of Hitachi 33.5” L-0 CCB Buckets Installed on an Emergency Basis after Bucket Failure




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