Anti-leakage and leak detection method of hydrogen pipeline in nuclear power plant

Abstract

The invention relates to the field of nuclear power plant construction and provides leakproof and leak detection methods of a hydrogen pipeline in a nuclear power plant to avoid explosion caused by hydrogen leak of the hydrogen pipeline. The methods comprise the steps that the hydrogen pipeline is sleeved with a protective casing, and an exposed protective electrostatic eliminating wire connected to the ground and a pipeline strutting piece for supporting the hydrogen pipeline are arranged in the protective casing; the protective casing is hermetically connected witha detection exhaust pipe provided with a detection protective pipe in a sleeved mode,a supporting plate for supporting the detection exhaust pipe and an exposed detection electrostatic eliminating wire connected to the ground are arrangd in the detection protective pipe; a hydrogen leak detection device is connected with the detection exhaust pipe in a sealing mode, sampling gas is extracted out from the protective casing to carry out contrastive analysis, and when the sampling gas contains hydrogen, leak occurs; when the sampling gas does not contain hydrogen, the leak does not occur. By the adoption of the leakproof and leak detection methods of the hydrogen pipeline in the nuclear power plant, the hydrogen leaked from the hydrogen pipeline can be prevented from diffusing into the environment, and whether or not the hydrogen of the hydrogen pipeline is leaked can also be detected.

Description

technical field [0001] The invention relates to the field of nuclear power plant construction, in particular to hydrogen pipeline leakage prevention and leakage detection methods in nuclear power plants. Background technique [0002] When a nuclear power plant is not operating normally, such as a light water reactor during a severe accident, a large amount of hydrogen will be produced and released into the steel containment vessel, and an explosion will occur when the hydrogen volume concentration in the steel containment vessel reaches a certain limit. Destroy the integrity of the steel containment vessel, resulting in the release of radioactive material from the nuclear power plant reactor. [0003] In order to avoid the accumulation of hydrogen generated in the steel containment during the operation of the nuclear power plant, hydrogen pipelines are laid during the construction of the nuclear power plant to discharge the hydrogen generated in the steel containment. At th...

AI Technical Summary

Problems solved by technology

In this way, since the hydrogen pipeline is laid underground, it is difficult for inspectors to detect whether the hydrogen pipeline leaks during the operation of the nuclear power plant. Therefore, the risk of explosion due to hydrogen leakage still exists, and once the hydrogen pipeline leaks, its danger relatively larger

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