Azura-Edo Independent Power Plant Environmental Impact ... - IFC

3.6 OPERATION
3.6.1 Maintenance
It is anticipated that all routine maintenance will be conducted by the plant’s
own maintenance team. This will include preventative, corrective and
predictive maintenance in addition to any maintenance or repair required as a
result of emergency breakdowns. In the event that major outages occur it is
anticipated that the services of sub-contractors will be engaged to maximize
economic efficiency. Routine preventative maintenance will be carried out as
part of a Long Term Service Agreement (LTSA) covering the gas turbines, the
gas turbine auxiliary equipment and the gas turbine alternators. Routine
preventative maintenance will be carried out by the operations and
maintenance contractor for the period between inspections.
It has been identified that both the gas turbine Original Equipment
Manufacturers (OEM) and several third party contractors are able to carry out
such long term maintenance on the gas turbines. In addition, the Operations
and Maintenance (O&M) contractor will be required to create preventative
maintenance plans for all of the plant areas, using software to generate work
orders for pieces of machinery and equipment; and all maintenance activities
will be recorded on the preventative maintenance programme.
Inspections are expected to be carried out annually and will be carried out in
the following sequence: two Combustion Inspections (14 days each), a Hot
Gas Path Inspection (25 days), two Combustion Inspections and then a Major
Inspection (60 days). The LTSA will also include emergency repair of
equipment.
Planned Maintenance Events
A typical general schedule for inspections and maintenance outages (planned
maintenance events) for the plant is outlined below in Table 3.5. The duration
of outages depends upon the work schedule as well as the number and types
of personnel assigned.
Table 3.5
Planned Maintenance Events
Maintenance Event Routine Outage Duration
Gas Turbine
Preventative
Maintenance
Inspections
This will be performed annually after offline water
wash. It will assess the overall condition of the gas
turbine with the objectives of reducing unplanned
maintenance, increasing gas turbine availability and,
potentially, to increase the intervals between
Planned Maintenance Events.
Two days
Gas Turbine
Combustion
Inspections
This will be performed at approximately 12,000
Factored Fired Hours for the Gas turbine, or as
modified by the mutual agreement of the Parties.
Six days
AZURA EDO IPP
3-20
DRAFT EIA REPORT