Stress corrosion monitoring system
A monitoring system and stress corrosion technology, applied in the field of reactor engineering, can solve the problems of inability to carry out high temperature and high pressure insulation dynamic sealing, electrochemical noise signal interference, inability to manufacture working electrodes, etc., to achieve compact structure, avoid corrosion, and good sealing Effect
Active Publication Date: 2015-04-29
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology
The chemical signal is very weak. The current experimental device has a complex structure and high background noise, which can easily interfere with the electrochemical noise signal and reduce the accuracy of the obtained data.
Moreover, traditional standard stress corrosion samples are not suitable for the preparation of slender and thin-walled tube samples for simulating reactor conditions
For the slender and thin-walled tube samples simulating the reactor working conditions, high temperature and high pressure insulation and dynamic sealing cannot be performed, so a working electrode without interference cannot be produced, so it is impossible to carry out the SCC experiment and Research on its online monitoring technology
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[0026] Stress corrosion monitoring systems such as figure 1 As stated, the system includes a main loop system, a bypass system, and a water treatment system, and the system uses heat convection to circulate water in the system.
[0027] The main circuit system is composed of a preheating furnace, a heating furnace, a cooling tank, and an operating tank. The preheating furnace heats the water medium to 230°C and provides enough resistance for one side of the water circuit to prevent backflow of high-temperature water. The heating furnace heats the water temperature to 320°C. In the high temperature state, the water expands in volume and flows out to the cooling tank to cool down. It forms thermal convection with the heating furnace section and promotes the flow of water in the entire stress corrosion monitoring system.
[0028] The bypass system is composed of a preheating furnace, a heating furnace, a cooling tank, and a multifunctional tank. The bypass system is mainly used ...
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The invention belongs to the technical field of reactor engineering, and discloses a stress corrosion monitoring system. The stress corrosion monitoring system comprises a main circuit system, a bypass system and a water treatment system, and the water in the system is circulated by adopting a heat convection way. The stress corrosion monitoring system is also provided with an electrochemical monitoring system, an electrochemical signal of a sample pipe under the stress corrosion effect is monitored through an electrochemical work station, and the sample pipe is insulated from the system by adopting an insulation sealing head. The stress corrosion monitoring system is simple to operate, compact in structure and capable of realizing the online monitoring of stress corrosion of a slender thin-wall sample pipe and online monitoring and replacement of water quality.
Description
technical field [0001] The invention belongs to the technical field of reactor engineering, and in particular relates to a stress corrosion monitoring system. Background technique [0002] Under the severe service environment of high temperature, high pressure and high irradiation of reactors, materials of internal components such as steam generator heat transfer tubes and main pipeline materials are prone to corrosion failure mainly caused by stress corrosion cracking (SCC), which seriously affects the safe operation of reactors. State-of-the-art stress corrosion cracking monitoring methods require reactor shutdowns, which can cause significant economic losses. If the on-line monitoring of stress corrosion in the reactor can be realized, the operation safety of the reactor will be greatly improved, and a large amount of economic losses will be reduced. The traditional stress corrosion cracking monitoring method is to judge the stress corrosion resistance performance of the...
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IPC IPC(8): G01N3/56
Inventor 杨洪广海正银张建通韩志博
Owner CHINA INSTITUTE OF ATOMIC ENERGY