Reassembly of the MTF for future testing has resumed. Fabrication of the perforated refractory dome support and the cored brick matrix has been completed. Additional design work for the refractory and insulation layups was required. A model of a HTAH for a 600 MW/sub e/ plant has been implemented on the SCAMP computer code. This model will be used to evaluate HTAH control concepts by computing system performance under various possible control methods. Limited funds were allocated to the project so work was limited to the highest priority activities.