STEAM GENERATOR AND NUCLEAR REACTOR SYSTEM

To provide a steam generator which offers improvement in terms of efficiency, ease of manufacture, performance, and safety features.SOLUTION: A steam generator for a nuclear reactor comprises plenums proximate to a first plane intersecting a bottom portion of a riser column of a reactor vessel. The steam generator further comprises plenums proximate to a second plane approximately parallel to the first plane and intersecting a top portion of the riser column of the reactor vessel. The steam generator further includes a plurality of steam generator tubes for conveying coolant from each plenum located proximate to the first plane to one of the plenums proximate to the second plane.SELECTED DRAWING: Figure 1 【課題】効率、製造容易性、性能及び安全機能を改善した蒸気発生器を提供する。【解決手段】原子炉用の蒸気発生器は、炉容器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