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Schematic diagram of a CANDU reactor:      Hot an      cold sides o the primary hivy-watter loop;      hot and      cold sides of secondary light-water loop; and      cool heavy water moderator in the calandria, along with partially inserted adjuster rods (as CANDU control rods are known).

1. Fuel bundle
2. Calandria (reactor core)
3. Adjuster rods
4. Heavy-water pressure reservoir
5. Steam generator
6. Light-water pump
7. Heavy-water pump
8. Fueling machines
9. Heavy-water moderator
10. Pressure tube
11. Steam going to steam turbine
12. Cold water returning from turbine
13. Containment building made of reinforced concrete

The CANDU, standin fur Canadae Deuterium Uranium, is a Canadian pressurized hivy-watter reactor design uised te generate electric pouer. The acronym refers te its deuterium oxide (hivy watter) moderator and its uise o (oreeginally, naitural) uranium fuel. CANDU reactors wir first cleckit in the late 1950s an 1960s bi a pairtnership atween Atomic Energy of Canada Limited (AECL), the Hydro-Electric Power Commission of Ontario, Canadian General Electric, an ither companies.

Thare hev bin twa major types o CANDU reactors, the oreeginal design o aroond 500 MW_e at wis intendit te be uised in multi-reactor installations in muckle plants, an the rationalized CANDU 6 in the 600 MW_e class that is designed tae be used in single stand-alone units or in small multi-unit plants. CANDU 6 units were built in Quebec an New Brunswick, as well as Pakistan, Argentinae, Sooth Korea, Romanie, an Cheenae. A single example of a non-CANDU 6 design was sold to Indie. The multi-unit design was used only in Ontario, Canada, an grew in size an pouer as more units were installed in the province, reaching ~880 MW_e in the units installed at the Darlington Nuclear Generating Station. An effort to rationalize the muckler units in a fashion similar tae CANDU 6 led tae the CANDU 9.

By the early 2000s, sales prospects for the original CANDU designs were dwindling due tae the introduction o newer designs from other companies. AECL responded bi cancelling CANDU 9 development an movin tae the Advanced CANDU reactor (ACR) design. ACR failed tae find any buyers. Its last potential sale was for an expansion at Darlington, but this was cancelled in 2009. In October 2011, the Canadian Federal Government licensed the CANDU design tae Candu Energy (a wholly owned subsidiary of SNC-Lavalin), which also acquired the former reactor development an marketing division o AECL at that time. Candu Energy offers support services for existing sites an is completing formerly stalled installations in Romanie and Argentinae through a partnership with China National Nuclear Corporation. SNC Lavalin, the successor to AECL, is pursuing new Candu 6 reactor sales in Argentina (Atucha 3), as well as Cheenae an Breetain. Sales effort for the ACR reactor has ended.

Category:Nuclear pouer reactor teeps