Systems and methods to enhance passive containment cooling system

A nuclear reactor comprising:

• a reactor pressure vessel;
• a reactor core located inside aid reactor pressure vessel;
• a containment vessel comprising a drywell and an enclosed wetwell, said reactor pressure vessel located inside said containment vessel;
• a cooling condenser submerged in a cooling pool of water, said cooling pool of water located outside the containment vessel;
• a vent line extending from said condenser to a suppression pool disposed in said wetwell;
• at least one drain line extending from said condenser to a condensate drain tank located in said drywell, said condensate drain tank comprising a pool of water, said at least one drain line in flow communication with said condensate drain tank;
• and
• a drywell gas recirculation subsystem coupled to said vent line, said gas recirculation subsystem located inside said drywell, said gas recirculation subsystem located inside said drywell and in fluid communication with non-condensible gases in said wetwell, comprising:
• a suction pipe coupled to, and in flow communication with said vent line;
• at least one valve located in said suction pipe;
• at least one blower coupled to said suction line;
• and
• a discharge pipe in flow communication with said drywell.