Research on Containment Pressure Suppression and Heat Transfer of Small PWR

Small PWR has adopted the suppression tank and the steel containment with outside pool to mitigate the containment pressure and temperature increasing after a relevant accident. The features of suppression and heat transfer are essentially different from those of a conventional PWR.This paper studied the features of the pressure suppression through the suppression tank and the heat transfer through the steel containment, respectively. After that, the requirement of the suppression tank and the heat transfer area was studied. Analysis results demonstrated that the pressure increasing can be suppressed effectively by the suppression tank, while the requirement of the heat removal can be fully satisfied if the heat transfer area increases to 350 m².