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Modernization of the HPC Flow 

Path for К‐1000‐60\1500

Turbines

2Steam Turbines for NPP

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Retention of the HP Casing and Rotor

Increase in Service Life to 60 Years

Increase inTime Between 

Overhauls to 6 Years

Increase in Reliability

Key Points

Increase inEconomic Efficiency

Increase in Power

3Steam Turbines for NPP

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Using the all‐milled shrouds of the rotor blades with a dovetail‐type 

annular binding

PERFORMANCE IMPROVEMENT

Using the rotor blades and guide vanes with improved profiles

Optimally distributing the stage heat drops

Optimizing the meridional lines of the flow path along the root 

and periphery

INCREASE IN

ECONOMIC EFFICIENCYis achieved by

Bringing the capacity of the HP flow path, 

including the 1st stage, to the actual capacity of the steam‐generating units

Increasing the reactor thermal outputto 3120 MW

is achieved by

INCREASE INPOWER

Providing steam suction from the root area through the rim clearance into the  steam discharge holes

Using multi‐row axial‐radial over‐shroud seals

is achieved by

INCREASE IN

RELIABILITY

4Steam Turbines for NPP

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Existing Flow Path of HPC of the К-1000-60/1500 Turbine

The rotor blades have riveted band shrouds

Upgraded Flow Path of HPC of the К-1000-60/1500 TurbineTURBOATOM

TURBOATOMMain Characteristics of the К‐1000‐60/1500 Turbine

Equipped  With a Modernized HPC

Design Characteristics

Parameter Option

1 2 3Reactor thermal power, MW 3000 3120 3210Rated parameters of live steam at the HPC valves inlet:

Flow rate, t/h 5938.08 6211.1 6417.28Pressure, kgf/cm2 (abs.) 60.0 60.0 60.0Temperature, 0С 274.3 274.3 274.3Dryness factor 0.995 0.995 0.995

Temperature of steam reheat (after MSR), 0С 250.0 250.0 250.0Steam pressure loss in the reheat circuit(from the HPC exhaust to the LPC inlet), % 7.0 7.0 7.0Cooling water temperature, 0С 15 15 15Cooling water flow to the condensers, m3/h 169800 169800 169800Steam pressure in the condenser, kgf/cm2 (abs.) 0.0352 0.0385 0.0393Steam rated pressure in the deaerator, kgf/cm2 (abs.) 7.0 7.0 7.0Feed water rated mass flow, t/h 5938.08 6211.1 6417,28Feed water temperature, 0С 222.7 225.0 224.0Electric power (without steam extractions over regeneration and with adding chemically purified water in the cycle), MW 1061.98 1100.0 1118.76

Gross heat rate, kJ/kWh (kcal/kWh) 10021.1 (2393.5)

10061(2403)

10138.8 (2421.6)

TURBOATOMModernization for the 1st to 7th stages of HPC

During modernization only rotor blades and diaphragms of the 1st to 7th stages are replaced (controller side & generator side)

The upgraded flow path of HPC ensures increase inHPC efficiency by approx. 2.9%

The design enhanced value of the electric power of the turbine plant equipped with upgraded 1 to 7 stages of HPC

is ~ 49.48 MW* with the reactor thermal power of 3120 MW

The above enchanced values of the electric power are guaranteed  within the entire cooling water temperature variation range.

* - compared to the existing flow path of HPC and reactor thermal power of 3000 MW

is ~ 12 MW* with the reactor thermal power of 3000 MW

is ~ 67.48 MW* with the reactor thermal power of 3210 MW

Dependence of the Electric Power of the К-1000-60/1500Turbine Plant on the Cooling Water Temperature and

Reactor Thermal Power TURBOATOM

1 ‐ QR=3000 MW, unmodified  flow path 

2 ‐ QR=3000 MW, new flow path of HPC

3 ‐ QR=3120 MW, new flow path of HPC

4 ‐ QR=3210 MW, new flow path of HPC

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Modernized HP rotor of the K-1100-60/1500-2M steam turbinefor Rostov NPP

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Basic Heat Diagramof the К-1000-60/1500 Turbine Plant

13Steam Turbines for NPP

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THANK YOUFOR

YOUR ATTENTION !