Japan · Tokyo · 35.690, 139.692 (approximate location)

YAYOI

YAYOI, a research reactor (fast) in Tokyo, Japan, with 2 kW of thermal power, operated by Nuclear Professional School, School of Engineering. Shut down, first critical in 1971.

It was one of the 27 research reactors Japan has had; 9 remain in operation today. It went critical 14 years after the first research reactor in Japan, JRR-1 (1957). 15 fast research reactors remain in operation today across 6 countries. Its declared uses include teaching, training, activation analysis and materials testing.

Country

Japan

City

Tokyo

Type

Fast

Thermal power

2 kW

Operator

Nuclear Professional School, School of Engineering

Status

Shut down

First criticality

1971

Purpose

Teaching, training, activation analysis, materials testing

See also: every research reactor in Japan · How research reactors work