ES
United States United States · Ithaca, NY · 42.459, -76.492 (approximate location)

ZPR Cornell Zero Power

ZPR Cornell Zero Power, a research reactor (tank) in Ithaca, NY, United States, with 100 W of thermal power, operated by Ward Laboratory of Nuclear Engineering. Decommissioned, first critical in 1962.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 20 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 36 tank-type reactors remain in operation today across 23 countries. Its declared uses include teaching.

Country
United States
City
Ithaca, NY
Type
Tank
Thermal power
100 W
Operator
Ward Laboratory of Nuclear Engineering
Status
Decommissioned
First criticality
1962
Purpose
Teaching

Data: IAEA RRDB · updated on Sep 3, 2026

More information

Related research reactors