United States · Las Vegas, NV · 37.117, -116.050

Flattop

Flattop, a research reactor (critical assembly) in Las Vegas, NV, United States, with 100 W of thermal power, operated by Los Alamos National Security, LLC. Operating, first critical in 1957.

It is one of the 48 research reactors operating in the United States. It went critical 15 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). It is one of 44 critical assemblies operating worldwide, spread across 12 countries. Its declared uses include nuclear data measurements.

Country

United States

City

Las Vegas, NV

Type

Critical assembly

Thermal power

100 W

Operator

Los Alamos National Security, LLC

Status

Operating

First criticality

1957

Purpose

Nuclear data

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