United States · Santa Susana, CA · 46.675, -119.569

STIR Shield Test and Irradiation Reactor

STIR Shield Test and Irradiation Reactor, a research reactor (pool) in Santa Susana, CA, United States, with 1 MW of thermal power, operated by Santa Susana Field Laboratory. Decommissioned, first critical in 1964.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 22 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 48 pool-type reactors remain in operation today across 28 countries. Its declared uses include materials testing.

Country

United States

City

Santa Susana, CA

Type

Pool

Thermal power

1 MW

Operator

Santa Susana Field Laboratory

Status

Decommissioned

First criticality

1964

Purpose

Materials testing

See also: every research reactor in United States · How research reactors work