Technical Field Advisor to provide owner representation for the outage as described below.
- Work in parallel with the contractor lead to maintain clear communication with HPU.
- Provide technical review/witness of critical data points and inspections.
- Provide daily reports of outage progress/issues.
- Provide a final report at outage completion.
Plant Information:
Saavi, La Rosita 1 Steam Turbine
Baja California/Mexicali, Mexico
Unit Information:
Alstom 292MW ZZ3 o SNGM01171
GEN Alstom 60WT21H-102 hydrogen cooled. Proposed Schedule:
08 JAN 27 – 19 FEB 27
Work Scope: 1. Turbine Disassembly of lagging, casings, shells, blades, vanes, etc.
Inspection and NDT of turbine casing, rotor, blades, diaphragms, guide vanes, bearings,
coupling and sealing on turbine. Ensure all opening and closing measurements are taken and
recorded properly.
Blast clean turbine rotors, visually inspect, record conditions, mag particle NDE, low speed rotor
balance, reinstall rotors, perform rotor alignment checks and record rotor clearances
Inspection and NDT of inlet steam valves, extraction valves, Non-Return Valves
Disassemble steam side for inspection
Visually inspect disc, seat and strainer (NDE seal weld)
Perform contact check on seats and discs
Record clearance and run out of stem
Clean stems and bushings and record clearances; reassemble
Visually inspect disc, seat and strainer (NDE seal weld)
Inspection of valves, actuators, strainers for gland- and leak-off system
inspection of valves, pumps, motors, filters, coolers, servomotors, for lube and hydraulic oil
system.
Inspection of heat exchangers and condensers in turbine auxiliary system
Reassembly
Supply and install all STG Soft-parts
2. Turbine Controls Steam Valves Hydraulic Actuators
External, visual inspection of operating actuators
Replace rod seals and wipers if necessary
Inspect and change servo strainers
Hydraulic Pumping System
(Owner will drain and refill tank.)
Inspect and charge accumulators.
Check pump operations and motor alignment.
Clean compensators.
Check and adjust relief valves as required.
Change filters, clean screens, reset indicators.
Clean and leak check EHC coolers
Inspect air dryer, recharge if necessary.
Turbine Control Components
i. Visually inspect linkage and adjust.
Check and adjust oil trip nozzle.
Clean and set gap on speed pickups.
Clean and inspect thrust bearing wear detector.
Stroke and check calibration of turbine stop and control valves. (In conjunction with customer I & C)




Inspect and clean low bearing pressure trip relay.
d. Supply and install all STG Soft-parts
Lube Oil System
Owner will drain and refill oil tank
Clean and inspect oil tank
Main oil pump: Disassemble, clean, inspect, record clearances and conditions and reassemble
Remove cooler heads, clean tube sheets and tubes with brushes, inspect and reassemble
Auxiliary oil pumps: Disassemble pumps, clean, visually inspect, record clearance and conditions
and reassemble (motor inspection not included)
Supply and install all STG Soft-parts
Turning Gear
Examine gears for wear and condition, clean and check operation (motor inspection not included)
Supply and install all STG Soft-parts
Steam Seal System (Responsibility of owner)
a. TFA will provide technical support for the following:
Steam Seal Regulator Valves
Disassemble and visually inspect pilot steam side of valve, piston and cylinder
Disassemble bellows and pivot rod and inspect
Disassemble feed and dump valves and inspect
Reassemble and check adjust as required
Spray Chamber (Hood spray)
Disassemble, clean and inspect inlet water nozzle and strainer
Adjust butterfly valves (customer scope)
Gland Exhauster
Disassemble blower, clean, inspect, record clearances and conditions and reassemble (motor inspection not included)
Remove gland condenser head
Clean tubes by wire brush
Supply and install of all steam seal system parts
Turbine Supervisory Instrumentation
a. Visually inspect and check calibration and functionality calibrate devices.
9. Pre—Start And Operational Checks a. Startup support will include 24 hours of support on two shifts for 24 hours after the release of
LOTO.
10. Steam Turbine Generator Major Inspection (Hydrogen Cooled Generator) a. Pre—shutdown Checks
The following Will be checked and recorded prior to shut down (TO be performed by
CSM if additional Contractor personnel is not on site):
Visually check insulated bearings.
Recurring problems and discrepancies review
Present annunciator drops
Operating data
Review active customer information letters
vii. Test the reverse power relay trip function
Options: viii.



Coast down measurement according to current test procedure
Mobilize
Marshal tools and equipment adjacent to the unit.
Establish work crews.
Prepare site for work.
Conduct site safety meeting.
Remove Lagging
Upper end shield lagging
Upper cooler dome lagging
Disassemble Generator
Disassemble journal bearings, visually inspect, record clearances and condition,
including ball seat contact and pinch checks.
Disassemble oil deflectors and hydrogen seals.
Disassemble end shield piping.
Disassemble/remove collector brush holder rigging.
Remove end shields and generator field.
Remove stator cooler heads.
Inspection
All results will be recorded on standard inspection forms.
Visually Inspect/Clean the following:
Bearings
Oil deflectors
Hydrogen seals
Hydrogen Coolers (brush cleaning of inside of the tubes only)
Generator field
Stator cooling air seal
Air chamber seals inspection
End winding support & insulation
Phase rings, leads and overhang insulation
Generator Housing
Tangential sp​acers
Brush Bridge Insulation resistances
Note: Any repairs or replacement of the components above will be performed as Additional f. Assemble Generator
Install stator cooler heads.
Generator field
bearings
Oil deflectors
End shields
Collector brush rigging
Supply and install all STG Soft-parts
Assemble Lagging
1. Upper end shield lagging
2. Stator cooler dome lagging and Operational Checks
g. Pre—Start
i. Check slow roll operation.
ii. Record start-up and operational data.
Demobilize
Clean up the work area to a condition similar to that in which it was found.
Remove tools.
Report
i. A final report of the inspection, including; conditions found, work performed, inspection data, clearance data, operational data, recommendations, and spare and renewal program parts, will be prepared and submitted in accordance with the Appendix 9.
Machine #4 bearing journal to restore the surface finish. o ProvidethisasanoptionalT&Mestimate.;
Notes:
Unless otherwise noted insulation, scaffold, office space, break rooms and ablution facilities will be provided by the client.
A Quality Plan with identified witness and/or hold points must be submitted for approval 30 days previous to the outage start by PSG.
A detailed outage scheduled shall be provided by PSG 30 days previous to the outage.
Final written outage report will be submitted to PSM within 30 days of outage completion.

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📌 Steam Turbine Technical Field Advisor (Centro Cívico)
🏢 ON GRID INFRASTRUCTURE SERVICES
📍 Centro Cívico