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10 Cards in this Set
- Front
- Back
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TAC Water Auto Starts: Test Question |
Standby pump auto starts if discharge pressure of operating pump lowers below 155 psig (145 psig) on CPI-600 (on common header). |
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TACW Pump Trips |
Load Conservation Loadshed Overload Overcurrent |
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What are the TACW System loads? Test Question |
Exciter Coolers Bus Duct Cooling Hydrogen Coolers Stator Water Coolers Steam Packing Exhauster (U1) Gland Steam Condenser (U2) |
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What are the power supplies for the TACW Pumps? |
TRAIN B 600 V - Note that a loss of Train B will result in a loss of TACW cooling and an eventual Turbine Trip due to rising Stator Temperatures. |
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What happens to the TACW inlet valves to the Steam Packing Exhauster/Gland Steam Condenser on an Extreme High Level? |
Valves will close. |
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Closed Cycle |
One of two TACW pumps take suction on the common return header and discharge through the TACW Hx. |
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What are the temperature requirements for being in Closed Cycle? |
>95F (U1), >104F (U2) |
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Open Cycle |
TACW pump suction is supplied from the Hotwell Pump Discharge header and pumped through Hx Bypass Valve (CMO-600). Once through loads, water is returned to Hotwell Pump discharge header. |
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Modified Open |
Open cycle with TACW Hx. Used up to 30% power to reduce overall condensate temps. |
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What are the measured parameters used to ensure TACW is operating correctly? |
Temperature & Pressure |
