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EXPERIMENTAL CLASS 5STEAM GENERATOR2015.05.15
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EXPERIMENT 5. STEAM GENERATOR
PWR system configuration and S/G S/G : Steam Generator
Cross point between 1st and 2nd sides of the NPP
Delivers heat
Primary Barrier for safety
Height : 21m
Weight : 800t
Reactor
heat S/G heat Turbine
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Primary water
Secondary water
S/G consists of; U-tubes
Moisture Separator (Steam Dryer) water
EXPERIMENT 5. STEAM GENERATOR
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U-tubes isolate primary loop from the secondary loop
If leak of the tubes -> Shut-down Prevention of Radioactive primary water release
Degradation : Strict inspection & Repair process
For Corrosion Problem
Water Chemistry strictly monitored
Chemical Treatment
Tube Material Changes : Inconel 600 ->690
EXPERIMENT 5. STEAM GENERATOR
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Moisture separators comprises of two principles : Centrifugal Force
EXPERIMENT 5. STEAM GENERATOR
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EXPERIMENTAL CLASS 6PUMP2015.05.15
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Pump Type Rotor-dynamic pump
Positive displacement pump
Rotary Pump
Reciprocating Pump
Cavitation
Reactor Coolant Pump
EXPERIMENT 6. PUMP
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Rotor-dynamic Pump Centrifugal( Volute ) pump Uses Rotational
centrifugal force
Axial Flow Pump converts kinetic Energy into Pressure
EXPERIMENT 6. PUMP
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Positive Displacement Pump Using mechanical force to generate pressure head
Rotary Pump (Robe type, Vane Type)
Reciprocating Pump : Piston’s movement in the cylinder
EXPERIMENT 6. PUMP
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ROTORDYNAMIC PUMP VS POSITIVE DISPLACEMENT PUMP
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Characteristic curve of Rotor-dynamic pumpCharacteristic curve of Positive Displacement pump
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Rotor-dynamic pump VS Positive displacement pump
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CAVITATION-VAPOROUS (H2O)
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<Pressure profile inside a centrifugal pump>
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CAVITATION-GASEOUS(AIR)
13<Performance reduction due to air in the pumps>
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CAVITATION
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REACTOR COOLANT PUMP
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ASSIGNMENT
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Exp. 5: S/G - write down in your own words within 1 page Find types of SG degradation and suggest solutions with
your point of view in 1 page
Exp.6: Pump - write down in your own words within 1 page Explain why 1) pumps follow an isentropic line theoretically,
2) pumps deviate from the isentropic line in real applications Explain where rotor-dynamic pumps and positive
displacement pumps are applied in NPP. Add reasons. Give some measures to avoid cavitation.