The ZED-2 is a low-power (200 W), tank-type (3.36 metres [11.0 ft] diameter, 3.35 metres [11.0 ft] high), heavy-water moderated reactor capable of a peak flux of 109 n/cm2.s.[1] Seven special Zirconium-alloy fuel assemblies are used and reactor control is via moderator level adjustment. Liquid (light or heavy water) and gas (CO2) coolants can be used and be heated to 300 °C (572 °F) at 8.6 megapascals (1,250 psi) while the heavy water moderator can be heated or cooled independently of the coolant in the Zr assemblies.
ZED-2 has also been used for definitive studies of the effects of heavy water and alternative ordinary (light) water and organic coolants. Sufficient CANFLEX (43-element) bundles are being built containing SEU fuel to provide "full-core" simulation for the Advanced CANDU Reactor (ACR) project.
In November 2010, the American Nuclear Society officially honoured the ZED-2 reactor with the title of 'nuclear historic landmark', recognising its 50 years of service and many contributions in the field of nuclear research and technology.[2]
