NUCLEAR REACTOR, IN PARTICULAR LIQUID METAL COOLED NUCLEAR REACTOR, WITH COMPACT PRIMARY HEAT EXCHANGER

摘要

A nuclear reactor (1), in particular a liquid-metal-cooled reactor, is provided with at least one compact primary heat exchanger (11), in particular a steam generator, which has a plurality of heat-exchange tubes (27) having respective spiral portions (37) set in levels on top of one another to form an annular tube bundle (40) delimiting a substantially cylindrical internal central zone (17), which houses, at the bottom, a circulation pump (10) and is pre-arranged for supply from below with primary fluid (liquid metal), which then traverses the tube bundle radially.