During this reporting period, the 1983 Experimental Program was completed in a series of three test runs. The first run focused on the continued evaluation of system effluents, both gaseous and liquid. Data were developed to permit the finalization of system mass balances. The second test run included transient tests designed to permit verification of the component and system dynamic models which were developed as part of this program. One of the transient tests evaluated the thermal and steam condensation response of several lengths of pipe in the facility. A series of transient tests were performed to correlate the resaturator dynamic model was the basis of the correlation technique. Also during the second test run, the combustion characteristics of the clean fuel gas from the process were measured over a wide range of conditions. The third test run focused on operation of the Process Evaluation Facility (PEF) system as if it were the fuel plant for a full-size, Integrated Gasification Combined Cycle (IGCC) power plant operating on a utility grid. These tests demonstrated the viability of operating an IGCC power plant under the changing load condition imposed by the utility environment. The systems performed smoothly with no adverse situations. This test series confirms not only the outstanding dynamic performance of IGCC plants, but also provides an excellent demonstration of the applicability of the dynamic analytical models to specific advanced control logic for this type of power plants. 6 figures, 6 tables.