Douglas Point Nuclear Power Reactor is a 200 MWe CANDU-PHWR*. Figure 1 is a schematic diagram of the primary coolant circuit of the reactor. The boiler tubes are made of Monel-400 alloy (nominally 70 wt% Ni, 30 wt% Cu); the primary circuit pipes and valves are made of ferritic steels; the pressure tubes and fuel sheaths are made of zirconium alloys (Zircaloy-2 and -4).

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