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Condensate

Condensate & Condensate Filtration

QuestionAnswer
What is the purpose of the Condensate System? To reclaim the steam used to drive the main turbines by condensing the exhaust of the low pressure turbines and also de-aerates and filters the exhaust for delivery to the feedwater system.
What is the condensate designated as? It is designated as the primary water supply to the reactor.
What is the purpose of the Main Condenser? Receives steam from the low pressure turbines during normal operation or the turbine bypass valves during startup, shutdown, or turbine trip.
What is the purpose of the Condensate Spray Pump? To spray water from the low pressure section of the condenser to the high pressure section of the condenser to prevent a large vacuum differential between condenser sections.
What is the purpose of the Vacuum Breakers? To break vacuum in the low, intermediate, and high pressure condenser sections during shutdown.
What is the power supply to the Vacuum Breakers? PB 131B
What is the purpose of the Condensate Pumps? To provide motive force to move condensate from the Main Condenser to the Feedwater Booster Pumps.
How many Condensate Pumps are there and what are their names? 3. Condensate Pump 11,12, & 13
What are the power supplies to the Condensate Pumps? Condensate Pump 11 (PB 11), 12 (PB 101), 13 (PB 12)
What is the purpose of the level control valves? To maintain the proper level for condenser differential seals to prevent air in-leakage.
What is the purpose of the Condensate Demineralizers? To remove corrosion products and minimize condenser tube corrosion through ion exchange.
What is the purpose of the Condensate to Condenser Minimum Flow Control Valves (50-24)? To recirculate condensate to the main condenser to prevent overheating of the condensate pumps during start-up.
What is the power supply of the Condensate Spray Pump? PB 13B
What is the power supply of the Condensate Demineralizer Control Panel? Transformer 142A
Where is the Hotwell located? At the bottom of the condenser.
Where is condensate in the condenser collected? In the Hotwell.
What provides condenser overpressure protection on low vacuum? Turbine Trips, Bypass Valve Trips, & MSIV closure.
What vacuum pressure is the condenser designed to maintain? 28.5" Hg vacuum or 1.5" Hg Absolute
At what pressure do the rupture disks on the turbine hoods relieve? 5 lbs
Where does the Low Pressure drains of the Condensate Spray Pump lead to? Condensate Spray Pump Sump
When does the Condensate Spray Pump Trip? Lo-Lo level in its' Sump
When do the Turbine Bypass Valves Open? When the Turbine Control Valves open less than a position corresponding to 15% turbine load
When does the Bypass Steam Cooling Spray Flow Control Valve (50-22) open? When the Turbine Bypass Valve opens and the Turbine Control Valve is open less than a position corresponding to 15% turbine load
How does the Bypass Steam Cooling Spray Flow Control Valve (50-22) fail upon loss of air? Fails closed
How do the Vacuum Breakers break vacuum? Motor-operated valves for each section of the condenser opens the turbine building
How are the Level Control Valves operated & how are they controlled? Air-operated. Controlled by the control room
How is the Hotwell level raised? by opening the 8" and 12" makeup valves
At what level are the 8" & 12" makeup valves fully open? 8" makeup valve fully opens at 62" and 12" makeup valve fully opens at 60"
How is the Hotwell level lowered? By opening the Spill Valve
At what level is the Spill Valve fully open? 68"
How are the spill valve and makeup valves controlled? Auto or manual control
How do the spill valve and makeup valves fail? Fail closed
How are the spill valve and makeup valves operated? Air-operated
What % capacity is each Condensate Pump designed to be? 50%
When do the Condensate Pumps Auto-start? 120 lbs
How are the Condensate Pumps cooled? RBCLC
What is the purpose of the Condensate Filtration System (i.e. Pre-filters)? To reduce particulate, Iron, & Copper loading of Condensate Demineralizers
How many Condensate Demineralizers are there? 6
What must be done to the Condensate Demineralizers prior to being placed in service? Must be vented and filled with water to prevent air from entering the reactor
What is the purpose of Flow Control Valve 50-20? Provide fixed flow to heat exchangers that cool: offgas Recombiner condensers, SFAE intercondenser & Aftercondenser, Also pre-heats condensate to improve efficiency
How does the Condensate to Condenser Minimum Flow Control Valves (50-24) & Flow Control Valve 50-20 fail upon loss of power? Fail open
What is the power supply for the Condensate to Condenser Minimum Flow Control Valves (50-24) & Flow Control Valve 50-20? I&C Bus 130
How does Flow Control Valve 50-20 fail upon loss of air? Fails as-is
How does Flow Control Valve 50-20 raise flow through the HXs? Throttles Closed
How does the Condensate to Condenser Minimum Flow Control Valves (50-24) raise flow through the pumps? Throttles Open
How does the Condensate to Condenser Minimum Flow Control Valves (50-24) fail upon loss of air? Fails Open
Where is Oxygen injected? The suction of the Condensate Pumps
Why is Oxygen injected? To create a Oxide layer
How many Pre-Filters are in the Condensate System? 4
What % condensate flow do the 2 Pre-Filter bypass lines allow? 25% & 100%
Created by: ckelle27
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