The Supercritical Transformational Electric Power (STEP) Demo pilot plant, a $169 million, 10-megawatt supercritical carbon dioxide (sCO2) test facility at Southwest Research Institute (SwRI) in San Antonio, has generated electricity for the first time. The pilot plant’s turbine achieved its full speed of 27,000 RPM, an operating temperature of 260°C and generated a small amount of power.