United States · San Diego, CA · 32.912, -117.130 (approximate location)

HTGR Critical Assembly

HTGR Critical Assembly, a research reactor (critical assembly) in San Diego, CA, United States, with 500 W of thermal power, operated by John Jay Hopkins Laboratory for Pure and Applied Science. Decommissioned, first critical in 1959.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 17 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include nuclear data measurements.

Country

United States

City

San Diego, CA

Type

Critical assembly

Thermal power

500 W

Operator

John Jay Hopkins Laboratory for Pure and Applied Science

Status

Decommissioned

First criticality

1959

Purpose

Nuclear data

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