Quantitative Location Leak Detection Method Using Helium Mass Spectrometry Leak Detection Equipment for Heat Transfer Tube of Nuclear Steam Generator

Abstract

The invention discloses helium mass spectrum leakage detection equipment for a nuclear evaporator heat conduction pipe and a quantitative positioning method. The equipment comprises an air source, a helium source, an air distributor, an injector and a gas distributor from upstream to downstream in sequence, and further comprises a diffuser, a sampling tool shelf, a mass spectrometer, a control cabinet and a computer. The diffuser is used for purging, the sampling tool shelf and the mass spectrometer are used for pumping and collecting gas, the control cabinet is used for analyzing data of the mass spectrometer or controlling the environment, and the computer is used for achieving man-machine interaction. The equipment can safely and accurately collect gas and analyze gas content and content changes, the number and positions of leakage points can be worked out with a leakage detection method, leakage detection time can be greatly shortened, and cost can be saved.

Description

technical field [0001] The invention relates to the field of nuclear power detection, in particular to a helium mass spectrometer leak detection device and a quantitative positioning method for a heat transfer tube of a nuclear evaporator. Background technique [0002] There are many kinds of leak detection methods, and the more commonly used ones are bubble leak detection, pressure change leak detection, halogen leak detection, helium mass spectrometry leak detection, penetration and chemical tracer leak detection, etc. Leakage inspection methods for some components, especially common valves, pipes, welds, etc., have been introduced in detail in relevant technical standards and professional materials. For the safe and economical operation of nuclear power plants, it is very urgent and necessary to study a suitable method to meet the requirements of steam generator heat transfer tube leakage inspection. The sniffing method is used for helium leak detection of heat transfer ...

AI Technical Summary

Problems solved by technology

The sniffing method is used for helium leak detection of heat transfer tubes. The existing sniffing method is a semi-quantitative method, which can only be used to detect leaks, not for quantitative purposes, and cannot detect the location of leaks.

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