NUCLEAR STEAM GENERATOR, METHOD FOR OPERATING THE SAME, AND REACTOR STEAM GENERATION SYSTEM

To provide a steam generator having efficiency, easiness in manufacturing, performance, and a safety function.SOLUTION: Steam generators 40 and 42 for a nuclear reactor include a plenum 85 adjacent to a first flat surface crossing a bottom of a riser tower of a reactor vessel 20. The steam generators further include plenums adjacent to a second flat surface that is approximately parallel with the first flat surface and crosses a top of the riser tower 30 of the reactor vessel. The steam generators further include a plurality of steam generator pipes for delivering a coolant from the plenum disposed adjacently to the first flat surface to one of the plenums adjacent to the second flat surface.SELECTED DRAWING: Figure 1 【課題】効率、製造容易性、性能及び安全機能を有する蒸気発生器の提供。【解決手段】原子炉用の蒸気発生器４０，４２は、炉容器２０のライザー塔底部と交差する第１平面に近接するプレナム８５を含む。蒸気発生器はさらに、第１平面と近似的に平行であって炉容器のライザー塔３０頂部と交差する第２平面に近接するプレナムを含む。蒸気発生器はさらに、第１平面に近接して配置されたプレナムから第２平面に近接するプレナムの一つへ冷却材を送達する複数の蒸気発生器管を含む。【選択図】図１