experimental class 5 steam generator 2015.05.15. experiment 5. steam generator pwr system...
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EXPERIMENTAL CLASS 5STEAM GENERATOR2015.05.15
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
Primary water
Secondary water
S/G consists of; U-tubes
Moisture Separator (Steam Dryer) water
EXPERIMENT 5. STEAM GENERATOR
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
Moisture separators comprises of two principles : Centrifugal Force
EXPERIMENT 5. STEAM GENERATOR
EXPERIMENTAL CLASS 6PUMP2015.05.15
Pump Type Rotor-dynamic pump
Positive displacement pump
Rotary Pump
Reciprocating Pump
Cavitation
Reactor Coolant Pump
EXPERIMENT 6. PUMP
Rotor-dynamic Pump Centrifugal( Volute ) pump Uses Rotational
centrifugal force
Axial Flow Pump converts kinetic Energy into Pressure
EXPERIMENT 6. PUMP
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
ROTORDYNAMIC PUMP VS POSITIVE DISPLACEMENT PUMP
10
Characteristic curve of Rotor-dynamic pumpCharacteristic curve of Positive Displacement pump
Rotor-dynamic pump VS Positive displacement pump
CAVITATION-VAPOROUS (H2O)
12
<Pressure profile inside a centrifugal pump>
CAVITATION-GASEOUS(AIR)
13<Performance reduction due to air in the pumps>
CAVITATION
14
REACTOR COOLANT PUMP
15
ASSIGNMENT
16
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.