The invention discloses an 
experimental system used for simulating severe accident conditions of the containment of a 
nuclear power plant and an implementation method thereof to overcome the problem that comprehensive 
simulation of severe accident conditions of the containment of a 
nuclear power plant cannot be realized in the prior art. The 
experimental system comprises an experimental container, a first 
pressure sensor arranged in the experimental container, a 
data acquisition system, an exhaust pipeline, an air supply 
system, a 
hydrogen supply 
system, a spray system, an 
aerosol supply system, a cable 
combustion product supply system, a 
water vapor on-line supply system and at least four sampling pipelines, wherein the 
data acquisition system is connected with the experimental container through multipoint thermocouples; the exhaust pipeline, the air supply system, the 
hydrogen supply system, the spray system, the 
aerosol supply system, the cable 
combustion product supply system, the 
water vapor on-line supply system and the at least four sampling pipelines are connected with the experimental container; and the 
aerosol supply system is connected with the spray system. The 
experimental system provided by the invention has a reasonable structure, can authentically and comprehensively simulate severe accident conditions in the 
nuclear power plant and carries out 
hydrogen elimination performance testing on a passive hydrogen recombiner on the basis of 
simulation results; moreover, testing results approximately represent actual working conditions, so good 
reference standards are provided for researching and designing of the recombiner.