Sodium cooled reactor system

Embodiments of the invention disclose a sodium cooled reactor system. The sodium-cooled reactor system comprises: a plurality of reactors, each reactor comprising a reactor vessel, a reactor core and a sodium coolant, the sodium coolant being accommodated in the reactor vessel, the reactor core being disposed in the reactor vessel, the sodium coolant being used for absorbing heat of the reactor core; the sodium pipeline is connected among the reactor containers of the plurality of reactors and is used for connecting the reactor containers of the plurality of reactors in series to form a sodium circulation loop, and the sodium coolant circulates in the reactor containers of the plurality of reactors and the sodium pipeline; the heat exchange device is connected in the sodium pipeline and is used for cooling the sodium coolant absorbing the heat of the reactor core; and the sodium driving device is connected in the sodium pipeline and is used for driving the sodium coolant to circulate in the sodium circulation