HOW TO CONDUCT RLA IN POWER PLANT EQUIPMENT

1. Boiler andTurbine

2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26------
Operation Start
Major outage every
4yrs
Expected life 35 to 45 yrs
Integrity Inspection
&
LifeTime Assessment
at 100,000 Running
Hours (12Years)
LifeTime
Assessment
at 160,000 Running
Hours
( 20 years )
Inspection Grade
Category “C” (every year)
Category “B” (every 2 years)
Category “A” (every 4 years)
Category “S”( Life
Assessment Inspection )

3.  Creep
 Low cycle fatigue
 Embrittlment
 Corrosion
 Wear
 Erosion

4. HeatTransfer Rate
(Mechanical Data)
Target hot parts
(configuration ,
dimension)
Operation
Data
Calculation ofTemperature and
Stress
Fatigue
Component
Creep
Component
NDT Data
Crack initiation
analysis
Crack propagation
analysis

6. Name Method
Fractography Scanning Electronic Microscope
Metallurgy Optical Microscopic
Chemical analysis SpectrometricAnalysis, X-ray analysis,
MechanicalTesting Tensile, Impact, Hardness
IN-situ-testing In-situ metallography
Non-destructive
testing
Radiography(RT), Ultrasonic(UT),
Magnetic particleTesting (MPT), Liquid
penetrationTesting (LPT)

7. Step1. Polishing & Etching for Replica
Surface of metal
Remove Scale
Etching Surface
Etching
Replica
Collect Replica
Step2. Replica
Scanning Electron Microscope for Physical Damage
Optical Microscope for Microstructure
Step3. Evaluation of Deterioration

8. Testing
Drum Visual VI
WFMT Wet Fluorescent Magnetic Particle
UTT UltrasonicThicknessTesting
Tubes Visual
UTT
EMATs based
inspection
Electromagnetic acoustic transducer
Hardness
Headers/ Pipes Visual
WFMT
Video probe Inspection
UT Ultrasonic test
Replica

9. Components Inspection Point/Area/Zone Evaluation
Rotor
VI, PT, MT All Surface Crack,Erosion
Corrosion
DI Shroud Clearance Creep
UT Blade Groove Crack, SCC
RT High Temp. Surface Softening
Replica Blade Groove SCC, Fatigue
Casing
VI, PT, MT All Surface Crack
RT High Temp. Surface Softening
RT, MT Casing Bolt of HP Part Creep, Softening
M.S.V
G.V
VI, PT, MT All Surface Crack
RT High Temp. Surface Softening
Replica High Temp. Surface Creep
RT, MT Casing Bolt of HP Part Creep, Softening

12. ThankYou