Japan · Tokai-mura · 36.473, 140.566 (approximate location)

JRR-1

JRR-1, a research reactor (homogeneous) in Tokai-mura, Japan, with 60 kW of thermal power, operated by Tokai Research & Development Center. Decommissioned, first critical in 1957.

It was one of the 27 research reactors Japan has had; 9 remain in operation today. It was the first research reactor in Japan to go critical. 15 homogeneous reactors remain in operation today across 6 countries.

Country

Japan

City

Tokai-mura

Type

Homogeneous

Thermal power

60 kW

Operator

Tokai Research & Development Center

Status

Decommissioned

First criticality

1957

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