and operators and commissioning personnel were assigned areas of responsibility for each subsystem to ensure safety was the top priority. The commissioning of the subsystems were to be done to the maximum extent prior to initiating a coordinated plant operation.

At the time this paper was issued, we completed checkout of three of six subsystems and were in the process of verifying the operation of the turbo charger subsystem. Figure 2 is a process flow diagram of the plant Prior to subsystem checkout, all field terminations were verified and the Bailey control system was commissioned. SDG&E lead the commissioning team, which included M-C Power, Bechtel, and Stewart & Stevenson. The commissioning process was performed with experienced SDG&E personnel in process engineering, instrumentation, electrical, operations, controls, and shop personnel.

SDG&E elected to play a unique role in this project as a team member and commissioning lead to ensure that utility procedures were followed and to gain experience with the carbonate fuel cell technology. Part of the process include troubleshooting and resolving technical issues during commissioning period. These issues fall into the following categories:

• Unanticipated limits of pre commercial technology

• Process design interface

• Equipment and system specification integration

• Equipment procurement coordination

• " Equipment performance deficiencies

• Construction errors

• Operational procedures deficiencies

During our troubleshooting process, we encountered some BOP system design issues that needed resolution in the field. One example of this is field modifications of the turbocharger loop, which

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