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OCR — OCR

Reactor technology overview and global count

Total units2
Operational0
Under construction0
Suspended0
Shut down2
Countries1
Operating capacity—

In the WhereNuc dataset there are 2 recorded OCR units across 1 countries. The earliest recorded OCR unit entered commercial operation in 1963, the most recent in 1963. No OCR units are currently listed as operational in this dataset.

Countries using OCR reactors

CountryUnitsShare
United States2100%

Common OCR models

ModelUnits
LMGMR (SGR-Sodium cooled graphite moderated reactor)1
OCM (Organically Cooled and Moderated Reactor)1
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Other reactor types

PWRBWRPHWRGCRLWGRFBR
Counts derived from the WhereNuc dataset (GeoNuclearData, WNA/IAEA-derived). Figures are approximate — verify official status with IAEA PRIS. Nuclear & uranium FAQ