a study has been performed to evaluate potential uses for the 1440 megawatts of heat being rejected in the form of 140 exp 0 f water by orgdp. over 200 uses were evaluated in the process industries, in district heating, in electrical generation, in agriculture, and in aquaculture. seven applications were selected for conceptual design and detailed economic analysis: catfish farming, prawns framing, greenhouses, methanol-from-coal production, salt refining, textile finishing, and district heating. only three (3) were adjusted to be both energy conservative and economically feasible: a five-acre bedding plant greenhouse, a 15,000 lb/h cotton finishing plant, and district heating systems for selected parts of knoxville and oak ridge. a system comprised of district heating, a textile finishing plant, and a greenhouse complex would have a capital cost of approximately $700,000,000 in 1978 dollars. design, procurement and construction would span a four year period except for district heating retrofit efforts which could extend an additional two years (era citation 06:002568)