Uploaded November 2023 | Updated September 2026, 1 week ago
At 5 a.m. on Nov. 4, 1943, the Graphite Reactor achieved criticality, making it the world's first continuously operated nuclear reactor.
The success of the reactor set the stage for ORNL, then known as X-10, to move forward as a scientific institution after the end of World War II.
See how ORNL has evolved from a top-secret laboratory to a world leader in #supercomputing, #materials research, #isotopes and #cleanenergy.
#science #history #manhattanproject #worldwarii
At 5 a.m. on Nov. 4, 1943, the Graphite Reactor achieved criticality, making it the world's first continuously operated nuclear reactor.
The success of the reactor set the stage for ORNL, then known as X-10, to move forward as a scientific institution after the end of World War II.
See how ORNL has evolved from a top-secret laboratory to a world leader in #supercomputing, #materials research, #isotopes and #cleanenergy.
#science #history #manhattanproject #worldwarii



![What Does ORNL Do? [Full version]
In the eight decades since Oak Ridge National Laboratory’s founding, our research has advanced understanding of the world around us — while building foundational infrastructure and expertise to support scientific discovery globally. From energy and the environment to human health and national security, ORNL is committed to solving the challenges that matter to you. Learn more: https://www.ornl.gov/bigscience
#science #energy #research What Does ORNL Do? [Full version]](https://i.ytimg.com/vi/8a_CYizL-ss/mqdefault.jpg)






