[en] This report provides descriptions and results of the technical effort during the second half of FY 82 on the Gas-Cooled Thermal Reactor Program. The work on Application Definition and Development (WBS 03) is associated with determining the characteristics and potential of the industrial process steam market and an evaluation of the HTGR thermochemical pipeline in the oil shale recovery area. The Plant Technology (WBS 13) efforts are mainly in the modification and checkout of the systems dynamics computer code, STAR, for the transient analysis of HTGR's in reformer applications, the initial development of a computer code to optimize the reformer plant-pipeline-methanator systems for various operating parameters and the scoping of a computer code to determine the mass transport of impurities in the coolant and their effects on the metallic components. The modular pebble bed reactor was evaluated under Technology Transfer (WBS 15). The efforts on systems and components for the reforming/thermochemical pipeline applications are performed under the High Temperature Nuclear Heat Source and Process/Chemical Plant Tasks (WBS 42 and 44). The Modular Reactor Study (WBS 53) is investigating the potential for multiple small reactors to provide lower costs, improved safety, and higher availability than the large cores