|City of Independence|
|AGENDA ITEM COVER SHEET|
Change Order No. 1, in the amount of $364,107.00, was issued to GE International for additional repairs to the H-5 combustion turbine generator at Substation H. The original purchase order (146493) was issued in the amount of $1,495,820.16. The new purchase order total is $1,859,927.16.
Staff is providing notification to the City Council of this change order.
Substation H is a vital part of IPL’s system: combustion turbines H-5 and H-6 are most often dispatched by the Southwest Power Pool (SPP). Currently unit H-5 is undergoing a scheduled Major Inspection by GE the OEM.
During the inspection, Insulation Resistance (IR) and Polarization Index (PI) testing were performed on the generator field (rotor) and stator in order to evaluate the condition of the field and stator windings for buildup of dirt and moisture, deterioration of the insulation, and suitability for further operation. Test results indicated that the H-5 field had below minimum resistance necessary for continued operation. GE recommended the generator field be cleaned and tested prior to continued service because of a high potential to damage the generator which would increase the risk of unit unavailability, additional repair costs, and safety concerns.
GE recommended removing the retaining rings for an inspection and thorough cleaning of the field rotor followed by retesting. The “rings-off” inspection required that the generator field rotor be shipped to a GE facility in Dallas, TX. During the cleaning/inspection the field blocking was found loose and had damaged the field insulation in localized areas. Cleaning the field, repairing the blocking and insulation improved IR and PI test results allowing field to go back in service.
Change Order (CR) No. 11 was requested on March 5, 2018, in the amount of $364,107.00, for additional work required to return unit to service as soon as possible. The additional work includes: generator disassembly/reassembly, rings-off inspection/cleaning testing, and round trip transportation.
The new purchase order total is $1,859,927.16
The unit is currently being repaired in Dallas, TX. It is essential that the unit is operational prior to the end of the scheduled outage. Any delays in the repair schedule could result in lost revenue for the City.
Req. No.: 69472 CR
Acct. No.: 70201705.5406.1714
CR Amount: $364,107.00
New PO Total: $1,859,927.16
|Department: Power & Light||Contact Person: Andrew Boatright|
|Purchasing Division (Finance Department)||Approved|
|Power and Light Department||Approved|
|City Managers Office||Approved|
|City Clerk Department||Approved|
|Council Action: ||Council Action: Accepted|
|GE Quote||Backup Material|