Case Study:

A 660MW power station operating under flexible cyclic load operation in Central India


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Problem
High value of conductivity after cation exchange

Stress corrosion cracking (SCC) of steam turbine blades 
Objective
To ensure quick start up of steam turbines after plant shut down, eliminating threats from anions like chlorides and preventing air ingress to the condenser.
Solution
Installation of Forbes Marshall's RelisafeTM CO2 system for measurement of degas conductivity after cation exchange (DCACE) enabling the operation and chemistry teams to take correct and timely decisions to start steam turbines quickly and safely.
Benefits
CO2 samples from steam and condensate taken before CACE measurement 

Accurate measurement of:
- specific conductivity
- conductivity after cation exchange (CACE)
- degas conductivity after cation exchange (DCACE)
- calculated pH
- calculated CO2

Start up time reduced by 3-4 hours

Fuel saving during each cold startup of the plant

No stress corrosion cracking (SCC) of steam turbine blades