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橡樹嶺國家實驗室 Oak Ridge National Laboratory   
橡樹嶺國家實驗室（Oak Ridge National Laboratory - 縮寫為ORNL）是美國能源部所屬的一個大型國家實驗室，成立于1943年，最初是作為美國曼哈頓計劃的一部分，以生產和分離鈾和钚為主要目的建造的，原稱克林頓實驗室。2000年4月以后由田納西大學和Battelle紀念研究所共同管理。

Oak Ridge National Laboratory (ORNL) is a multiprogram science and technology national laboratory managed for the United States Department of Energy (DOE) by UT-Battelle. ORNL is the largest science and energy national laboratory in the Department of Energy system.[1] ORNL is located in Oak Ridge, Tennessee, near Knoxville. ORNL's scientific programs focus on materials, neutron science, energy, high-performance computing, systems biology and national security.
ORNL partners with the state of Tennessee, universities and industries to solve challenges in energy, advanced materials, manufacturing, security and physics.
The laboratory is home to several of the world’s top supercomputers and is a leading neutron science and nuclear energy research facility that includes the Spallation Neutron Source and High Flux Isotope Reactor. ORNL hosts the Titan supercomputer; the Center for Nanophase Materials Sciences, the BioEnergy Science Center, and the *Consortium for Advanced Simulation of Light-Water Reactors.