Support tube, air electrode, and cell fabrication techniques were improved. Air electrode characterization studies continued, both under simulated cell fabrication conditions and long-time operation at 1000/sup 0/C. Modifications to the EVD equipment have been made to improve halide delivery and interconnection deposit quality. Three-cell stack testing continues at 3400 test hours and 22 thermal cycles with stable performance. Cell component qualification tests continued to be developed and used. Reactivity and diffusion studies continued relative to long-time air electrode/electrolyte compatibility at elevated temperature. A dedicated five-cell test facility was assembled for simultaneous testing of four (4) single cells and one (1) multi-cell stack. The 24-cell submodule design was completed, and procurement of long lead time components was initiated. Tests for component checkout were designed. The computer program, modeling the solid oxide fuel cell behavior, continued to be developed.