WI Socialization - Generator H2 Dryer Regeneration

Where is H2 dryer located?

• Inside of turbine building

• Same floor level with seal oil and CO2 vaporization skid

• Consist of Generator H2 cooling system skid

• Beside the GT water mist compartment

• Inside of generator compartment

What is/are special tool(s) that conducted for this instruction?

• H2 gas detector

• Non-spark tool

• SCBA

• Fireguard wearpack

Following the work instruction, what is/are the indication(s) that the H2 dryer should be done to regenerate?

• The purity of H2 dropped to less than 96%

• The H2 pressure in generator dropped to <4.9 bar

• The silica gel in H2 dryer have white color

• Shift leader makes a command to regenerate the dryer.

Dryer inlet isolation valve has marked by?

Dryer outlet isolation valve has marked by?

Dryer outlet vent valve has marked by?

H2 isolation valve to Generator from Dryer has been marked by?

H2 isolation valve from Generator to Dryer has been marked by?

Dryer CO2 supply isolation valve has marked by?

How much CO2 Expansion & Vaporization outlet pressure and temperature setpoint?

• 15 bar & 15°C

• 16 bar & 15°C

• 15 bar & 16°C

• 16 bar & 16°C