Application of tracer gas dilution method to unfiltered air leakage test in main control rooms of Hualong-1 nuclear power plant

Aiming at the unfiltered air leakage test in the main control room of Hualong-1 nuclear power plant, analyses the advantages and disadvantages of tracer gas constant injection method in Hualong-1 nuclear power plant based on the experience of leakage test in the main control rooms of AP1000 type nuclear power plant, and puts forward the corresponding improvement suggestions.