ATS 2010 GE MS6001B Sample Borescope Inspection Report

Advanced Turbine Support, Inc.

Unit -2

Advanced Turbine Support Gas Turbine Borescope Inspection Report Utility Unlimited Energy

Inspector(s) Robert Burkhart

Inspection Date September 16, 2010

Serial Number 295XXX/ 336X447

Site Unit No. Unit 2

Manufacturer General Electric

Model MS6000B

Type of Fuel Natural Gas / Distillate

Inspection Type Borescope Inspection

Site Contact Plant Manager

Total Fired Hours 2380.9

Manual Starts 508

Total Starts 578

Fired Starts 456

Unit Trips 19

Scope This report describes and documents the September 16th, 2010 borescope examination of the General Electric Frame MS6000B combustion turbine. This inspection included the compressor section, the turbine section, the combustion section and a limited exhaust inspection. The access to the turbine section and the components in combustion chambers 2 and 8 was achieved by removal of the fuel nozzles and the borescope ports in the case. A general inspection of combustion chambers 1, 3, 4, 5, 6, 7, 9 and 10 was performed by access through the crossfire tubes. The generator rotor end windings were inspected for insulation migration on both the turbine and excitor ends. Both of the main leads from the shaft to the rotor windings were inspected. The lead that is aligned with the three bolts on the shaft in the brush compartment is lead “A”. The purpose of this borescope examination was to look for conditions considered to be abnormal to the unit and to gather trending data. Photographs The photographs included in this report were selected from the inspection to best represent the condition of the unit. Selected photographs that show problem areas and typical views of the components observed are included as part of this report for documentation and comparison during future examinations. Magnification of the distal tip lens may make objects appear larger. A surface that is actually straight or true may appear slightly wavy or curved in a photograph. Due to the possibility of optical distortion, someone familiar with borescope photography should be involved in the final engineering review of this report.

1


Unit -2

Observations Compressor Section 1. There are deposits on the variable inlet guide vanes through the stage S-8 stator vanes. 2. There is impact damage to the leading edge of several stage R-1 rotor blades. The damage appears to be within the OEM’s limitations. 3. No shims were identified at the stage S-1 through S-4 ring segments. Combustion Section 1. The combustion caps, fuel nozzles, crossfire tubes and liners appear to be in good condition with typical carbon buildup on the primary fuel nozzles. 2. The transition pieces, floating seals and side seals on the transition pieces appear to be in good condition. Turbine Section 1. There are cracks in the trailing edge and outer platform on several of the first stage nozzles in the lower half of the unit. The cracks range in length from approximately 1/4 inch to 1/2 inch. 2. The first stage nozzle seal slots and discourager seals appear to be in good condition. 3. There are multiple tight cracks in the coating on the platforms and leading edge of the first stage rotor buckets. 4. The first stage buckets have rubbed against the shroud blocks at the four o’clock position. This has resulted in discoloration along the bucket tips. Smeared metal is evident on the shroud blocks in this location. 5. The second stage nozzle seal slots and discourager seals on the trailing edge of the second stage nozzles appear to be in good condition. 6. There are cracks in the trailing edge of the second stage nozzles in the lower half of the unit. 7. The second stage buckets, bucket tip shrouds and knife edge seal on the shroud blocks appear to be in good condition. 8. The third stage nozzles, seal slots, and discourager seals appear to be in good condition. 9. The third stage buckets, bucket tip shrouds and honeycomb seal on the shroud blocks appear to be in good condition. Exhaust Section 1. The exhaust appears to be in good condition. Generator Rotor- Turbine End Windings 1. The insulation migration from between the rotor end windings at the turbine end of the rotor doesn’t appear to have changed since the inspection in 2009. 2. There are no signs of any significant movement of the blocking between the end windings 2


Unit -2

Observations Continued Generator Rotor- Excitor End Windings and Main Leads 1. The insulation migration from between the rotor end windings at the excitor end of the rotor doesn’t appear to have changed since the inspection in 2009. 2. There is impact damage on lead “A”. 3. There is evidence of wear and copper leaf separation on leads “A” and “B”. 4. There are no signs of any movement of the blocking between the end windings. Recommendations 1. Have engineering disposition the items listed in the observation section. 2. Continue to inspect the unit on an annual basis to monitor its condition. Limitation of Liability A borescope inspection is intended to provide a representative sample of the unit condition. While every attempt will be made to identify all items considered to be abnormal, items may be missed that could cause future damage. In no event shall ATS, Inc. be liable for compensatory, consequential, incidental, special, punitive or other damages whether the claim for damages is based on contract, tort, or otherwise. ATS, Inc. limits its liability to the value of this contract. Robert Burkhart Inspection Specialist Advanced Turbine Support, Inc. Mobile 352-586-7684 Office 352-332-4061 www.borescopeinspections.com

3


Unit -2

Section Component

Inlet Plenum Bellmouth

Comments

Section

Compressor

Stage

Inlet Guide Vanes

Comments

4

Deposits


Unit -2 Section Stage Component

1 Rotor Blade

Location

General

Comments

Impact Damage

Section Stage Component Location Comments

5

Compressor

Compressor 1 Stator Vane General



2 Rotor Blade

Location

General

Comments

Deposits


6

Compressor




3 Rotor Blade

Location

General

Comments

Deposits

Section Stage Component

7

Compressor

Compressor 3 Stator Vane

Location

General

Comments

Deposits



4 Rotor Blade

Location

General

Comments

Deposits


8

Compressor




5 Rotor Blade

Location

General

Comments

Deposits


9

Compressor


Location

General

Comments

Deposits



6 Rotor Blade

Location

General

Comments

Deposits


10

Compressor




7 Rotor Blade

Location

General

Comments

Deposits


11

Compressor


Location

General

Comments

Deposits



8 Rotor Blade

Location

General

Comments

Deposits


12

Compressor


Location

General

Comments

Deposits


Unit -2 Section Stage Component Location

Compressor 9 Rotor Blade General

Comments


13





Comments


14





Comments


15





Comments


16

Compressor 12 Rotor Blade Trailing Edge




Comments


17





Comments

Section

Combustion

Component

Combustion Cap

Location Comments

18

General


Unit -2 Section

Combustion

Component

Primary Fuel Nozzle

Location

General

Comments

Section Component Location Comments

19

Combustion Crossfire Tube General


Unit -2 Section Component Location

Combustion Liner Liner 4

Comments


20

Combustion Left Side Picture Frame TP 8



Combustion Right Side Picture Frame TP 8

Comments


21

Combustion Side Seal General


Unit -2 Section

Combustion

Component

Floating Seal

Location

General

Comments

Section

Turbine Stage 1

Component

Nozzle Leading Edge

Location Comments

22

General


Unit -2 Section

Turbine Stage 1

Component

Nozzle Leading Edge

Location

General

Comments


23

Turbine Stage 1 Nozzle Seal Slot General


Unit -2 Section

Turbine Stage 1

Component

Nozzle Trailing Edge

Location

General

Comments

Section

Turbine Stage 1

Component

Nozzle Trailing Edge

Location Comments

24

General Crack



Bucket Platform

Comments

Coating Cracks

Section

Turbine Stage 1

Component Location Comments

25

Turbine Stage 1

Bucket Platform Coating Cracks



Bucket Platform

Comments

Coating Cracks

Section

Turbine Stage 2


26

Turbine Stage 1

Nozzle Leading Edge



Turbine Stage 1 Bucket Leading Edge

Comments


27

Turbine Stage 1 Bucket Cooling Hole



Turbine Stage 1 Bucket Trailing Edge

Comments


28

Turbine Stage 1 Bucket Shroud Block Rub



Turbine Stage 2 Nozzle Leading Edge

Comments


29

Turbine Stage 2 Nozzle Trailing Edge Crack



Turbine Stage 2 Nozzle Discourager Seal

Comments


30




Turbine Stage 2 Bucket Tip Shroud

Comments


31

Turbine Stage 2 Bucket Interlocks



Turbine Stage 2 Bucket Knife Edge Seal

Comments


32





Comments


33




Turbine Stage 3 Nozzle Trailing Edge

Comments


34

Turbine Stage 3 Nozzle Trailing Edge




Comments


35




Turbine Stage 3 Bucket Interlocks

Comments


36





Comments

Section

Exhaust

Component

Diffuser

Location Comments

37

Top


Unit -2 Section

Generator

Component

End Winding Insulation

Location

Turbine End

Side

Right Side

Comments

Section Component


Location

Turbine End

Side Comments

38

Generator

Right Side


Unit -2 Section

Generator

Component


Location

Turbine End

Side

Right Side

Comments

Section Component


Location

Turbine End

Side Comments

39

Generator

Right Side


Unit -2 Section

Generator

Component


Location

Turbine End

Side

Left Side

Comments

Section Component Location Side Comments

40

Generator End Winding Blocking & Insulation Turbine End Left Side


Unit -2 Section

Generator

Component


Location

Turbine End

Side

Left Side

Comments


41

Generator End Winding Blocking & Insulation Turbine End Left Side


Unit -2 Section Component Location Comments


42

Generator Rotor Lead B Excitor End Impact Damage

Generator Rotor Lead A Excitor End Impact Damage


Unit -2 Section Component

Rotor Lead A

Location

Excitor End

Comments

Leaf Separation

Section

Generator


43

Generator

Rotor Lead B Excitor End



Rotor Lead B

Location

Excitor End

Comments

Leaf Separation

Section

Generator

Component


Location

Excitor End

Side

Right Side

Comments

44

Generator



Generator End Winding Insulation

Location

Excitor End

Side

Right Side

Comments

Section Component


Location

Excitor End

Side

Right Side

Comments

45

Generator


Unit -2 Section Component Location Side

Generator End Winding Insulation Excitor End Left Side

Comments


46

Generator End Winding Insulation Excitor End Left Side


Unit -2 Section Component Location Side Comments

47

Generator End Winding Blocking & Insulation Excitor End Left Side

ATS 2010 GE MS6001B Sample Borescope Inspection Report

Recommend Documents