GE94-02: Repair Flow Testing and Calibration Procedures for ...

GE98‐01B: Specification for Thermal Barrier Coating of GTD‐111 ® Combustion
Turbine Buckets. March 2000.
This specification establishes the minimum technical requirements for applying a two‐layer
(metallic and ceramic) thermal barrier coating (TBC) on GTD‐111, nickel –base alloy substrates.
GE98‐02: The Life Cycle Value of TBC Coatings on MS7001E/EA First Stage
Nozzles and Buckets. February 2000.
The purpose of this project was to investigate the life cycle value of TBC coatings on GE
MS7001E/EA 1 st stage turbine nozzles and buckets. The life cycle cost/benefit analysis indicated
that the combined, net present worth of older style 1 st stage nozzles and buckets could be
increased by between $225,000 and $4,200,000 over a 12‐year analysis period for a single unit
plant. The net present worth was maximized using strategies that involved increasing the firing
temperature from 2020°F from 2035°F. The economic benefits were greatest for MS7001E/EA
units in continuous vs. peaking duty.
GE98‐06: MS7001E/EA 1 st Stage Parts Life Extension vs. Expedited Depletion.
July 1999.
The purpose of this project was to perform an analysis of expedited GE MS7001E/EA 1 St stage
nozzle and bucket life depletion under uprated (2035?F) operating conditions.
The life cycle cost/benefit analysis indicated that the combined net present worth of older style
1 st stage nozzles and buckets could be increased by between $450,000 and $1,190,000 over a
12‐year analysis period for a single unit plant. These gains were realized through O&M
strategies that included (1) expedited life depletion, (2) repair and re‐use (including the
application of TBC coatings) and (3) the replacement of older style components with
conventionally cast, 1 st stage buckets with TBCs vs. upgrading to current design DS GTD‐111
buckets.