Nuclear reactor

Nuclear reactor comprising the primary circuit fuel channels, situated in a moderator and cooled by a cooler, for example by water under pressure, is described. To improve reactor operation reliability the primary circuit fuel channels are made in a form of autonomous modules with a circuit of natural convection inside each module. The modules are joined to groups with a common pressurizer system. Utilization of the above reactor design simplifies the flow sheet and increases reactor reliability and radiation safety, decreases a probability of the primary circuit leakage and improves pressure-suppression at the accident like this