Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

The K-25 Plant

Ranger Home > Oak Ridge > The K-25 Plant

Explaining Gaseous Diffusion
Creative Chemistry
Biking Around K-25
Testing for Leaks
Read Transcript
Quick Fact:
The K-25 Plant used the gaseous diffusion process to separate the fissile uranium-235 from uranium-238. "K-25" comes from Kellex Corporation, the contractor that designed and built the plant, and uranium-235, often shortened to "25." A mile-long, U-shaped building, the K-25 plant was the world’s largest roofed building at the time.