Nuclear -- Finally, a Benchmark (IMAGE) DOE/Oak Ridge National Laboratory Caption ORNL's Molten Salt Reactor Experiment operated 1966-1970, successfully using U235 and U233 fluoride fuels. The historic experiment is the basis for a new molten salt reactor benchmark. Credit Oak Ridge National Laboratory, U.S. Dept. of Energy 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.