# Chicago Pile 3

> first heavy water reactor in the world, going critical on 15 May 1944

**Wikidata**: [Q5095738](https://www.wikidata.org/wiki/Q5095738)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Chicago_Pile-3)  
**Source**: https://4ort.xyz/entity/chicago-pile-3