STEP DEMO HIGH BAY (IMAGE) Southwest Research Institute Caption In late 2023, the Supercritical Transformational Electric Power (STEP) Demo pilot plant achieved mechanical completion, with all the major subsystems installed. In early 2024, SwRI fired the natural gas heater to operate the STEP turbine at 18,000 rpm during commissioning, an industry first for a facility of its kind. Credit Southwest Research Institute Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.