Jōyō

also JOYO

Jōyō is a 100 MW thermal sodium-cooled fast research reactor in Oarai, Japan, operated by JAEA. The IAEA Research Reactor Database lists it as in temporary shutdown, with first criticality on 24 April 1977.

Operator: JAEA
Type: Research reactor
Approach: SFR
Country: JP
Status: Suspended

Design values

What the machine was built to do, as published. Not results, and never ranked.

Design values for Jōyō
Parameter	Value	Unit	Status	Source
Thermal capacity (rated) medium confidence	100 MW	MW	claimed	IAEA Research Reactor Database (RRDB): public reactor list (JSON behind nucleus.iaea.org/rrdb) aggregator