Among passive systems, the steam injectors (also called 'condensing ejectors' or 'steam jet pumps') are one of the most interesting apparatus. The reactor application envisaged here is the Steam Generator Emergency FeedWater System (EFWS) of Pressurised Water Reactors (PWRs). Considering the European Pressurized Water Reactor (EPR) and the Russian WWER-440/213, functional specifications heave been established for each plant regarding the operation of a Steam Injector system. Experimental studies address the development of an innovative steam injector design and the constitution of a significant database allowing the elaboration of dedicated steam injector correlations and the validation of a computational model. The modelling studies are undertaken using the CATHARE thermalhydraulic computer code and in particular its one-dimensional module. Significant code adaptations are necessary (numerics, geometrical modelling capabilities). Correlations dedicated to the steam injector nominal functioning will be derived including a pertinent physical description of the domain where this nominal functioning can be obtained. CATHARE plant models of the reference PWR reactors will be used to calculate some accidental transients and to assess the plant responses with steam injector based EFWS. The evaluation of this new safety system will be made by making comparisons to existing solutions.
Design and Development of a Steam Generator Emergency Feedwater Passive System for Existing and Future PWRs Using Advanced Steam Injectors (DEEPSSI)
Meloni, P.
2001-11-12
Abstract
Among passive systems, the steam injectors (also called 'condensing ejectors' or 'steam jet pumps') are one of the most interesting apparatus. The reactor application envisaged here is the Steam Generator Emergency FeedWater System (EFWS) of Pressurised Water Reactors (PWRs). Considering the European Pressurized Water Reactor (EPR) and the Russian WWER-440/213, functional specifications heave been established for each plant regarding the operation of a Steam Injector system. Experimental studies address the development of an innovative steam injector design and the constitution of a significant database allowing the elaboration of dedicated steam injector correlations and the validation of a computational model. The modelling studies are undertaken using the CATHARE thermalhydraulic computer code and in particular its one-dimensional module. Significant code adaptations are necessary (numerics, geometrical modelling capabilities). Correlations dedicated to the steam injector nominal functioning will be derived including a pertinent physical description of the domain where this nominal functioning can be obtained. CATHARE plant models of the reference PWR reactors will be used to calculate some accidental transients and to assess the plant responses with steam injector based EFWS. The evaluation of this new safety system will be made by making comparisons to existing solutions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
