DSC_0314.jpg (IMAGE) DOE/Idaho National Laboratory Caption A rare view into the Advanced Test Reactor’s 35-foot high reactor vessel, after removal of the 31-ton stainless steel top head to begin a full core overhaul that was completed on March 21, 2022. Credit Idaho National Laboratory Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.