08-08-2016 BPU RPT 08 - Laserfiche WebLink

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W A I E R E N E R G Y I. l F F RIVERSIDE PUBLIC UTILITIES Jl� W& Board Memorandum P U B L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: AUGUST 08, 2016 ITEM NO: 8 SUBJECT: PURCHASE ORDER WITH GE PACKAGE POWER, INC. FOR THE IMPLEMENTATION OF GENERAL ELECTRIC SERVICE BULLETIN 310 FOR RECOMMENDED REPAIRS ON RIVERSIDE ENERGY RESOURCE CENTER UNITS 1 AND 2 GAS TURBINE ENGINES, REQUEST FOR PROPOSALS NO. 1630 - IN THE AMOUNT OF $126,139 ISSUE: Approval of a purchase order with GE Package Power, Inc. to install the recommended repairs under GE Service Bulletin 310 on Riverside Energy Resource Center Gas Turbine Engines in Units 1 and 2. RECOMMENDATION: That the Board of Public Utilities approve a purchase order to GE Package Power, Inc., of Houston, Texas, for installation of recommended repairs under GE Service Bulletin 310 on the Riverside Energy Resource Center Units 1 and 2 gas turbine engines in the amount of $126,139. BACKGROUND: The Riverside Energy Resource Center (RERC) facility consists of four GE LM6000 model gas turbine engines that produce 200 megawatts of electricity that can provide up to thirty percent of Riverside's summer daily electric power demands. The City commissioned RERC Units 1 and 2 in 2005. Since then, the gas turbines have started 1,270 and 1,120 times for Units 1 and 2, respectively. A service bulletin is a document issued by a manufacturer to notify equipment owner /operators of an identified deficiency with specific equipment that could have a significant material impact if not addressed timely. GE Service Bulletin 310 (SB310) dictates partial replacement of gas turbine High Pressure Compressor (HPC) blades before the gas turbine unit has started 1,500 times. Completing the HPC blade replacement during the California Independent System Operator's ( CAISO) approved plant outage in November 2016 is essential to avoid exceeding the 1,500 start limitation. Waiting until the next CAISO approved outage period in November 2017 will likely exceed the start recommendation from GE Package Power, Inc. (GE) and could make the units unavailable. The LM6000 model gas turbine has fourteen stages of HPC blades. SB310 addresses replacement of the affected rotating blades on stages three, four and five of the fourteen stages. If not replaced before the 1,500t" engine start, the rotating blades can become dislodged, cause significant downstream damage during engine operation, and result in catastrophic failure of the gas turbine. The following illustration shows various components of the turbine, with the portion in green (prior to the combustor) representing stages three, four, and five of the HPC under SB310 discussed in this report.