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Japan Japan · Tokai · 36.461, 140.606

NSRR

NSRR, a research reactor (tRIGA) in Tokai, Japan, with 300 kW of thermal power, operated by Tokai Research Establishment. Operating, first critical in 1975.

By thermal power it ranks fifth among the 9 research reactors operating in Japan. It went critical 18 years after the first research reactor in Japan, JRR-1 (1957). It is one of 36 TRIGA reactors operating worldwide, spread across 17 countries. It is one of 65 research reactors in 20 countries that General Atomics designed or built.

Country
Japan
City
Tokai
Type
TRIGA
Thermal power
300 kW
Operator
Tokai Research Establishment
Design and construction
Designed by General Atomics
Status
Operating
First criticality
1975
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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