Plutonium-238 (IMAGE) DOE/Oak Ridge National Laboratory Caption By producing 50 grams of plutonium-238, Oak Ridge National Laboratory researchers have demonstrated the nation's ability to provide a valuable energy source for deep space missions. Credit Department of Energy's Oak Ridge National Laboratory Usage Restrictions None License Licensed 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.