Nuclear power plant buried hydrogen pipeline leakage monitoring system and method

The invention relates to a nuclear power plant buried hydrogen pipeline leakage monitoring system and method. The system comprises a sleeve, hydrogen concentration probes and a control unit. A hydrogen pipeline is arranged in the sleeve, the sleeve and the hydrogen pipeline form a closed space, vertical pipes are arranged on the sleeve and arranged at the two ends of the sleeve, and the hydrogen concentration probes are arranged at the upper ends of the vertical pipes and connected with the control unit. The method comprises the steps of acquiring the time difference of trigger alarms of the two hydrogen concentration probes; acquiring the gas flow rates detected by two gas flow rate sensors; preliminary positioning a leakage point, and determining a leakage section; and positioning the leakage point. The nuclear power plant buried hydrogen pipeline leakage monitoring system and method have the advantages that the leakage point can be accurately positioned, the requirement for the leakproofness of the glass f