Natural circulation systems for severe accident mitigation

NATURAL CIRCULATION SYSTEMS FOR SEVERE ACCIDENT MITIGATION 

Safety systems for the mitigation of severe accident are designed to meet level 4 of the defence in depth strategy against significant releases of radioactivity to the environment. From this point of view, the main goals of severe accident mitigation are as follows  

According to the above goals, systems for severe accident mitigation can be classified by function H2-control, heat removal and corium/debris retention. Below the passive systems for severe accident mitigation in new designs are discussed in the context of their use of natural circulation as a design principle. 

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