Mobile lithium ion concentration measurement device

Abstract

The invention belongs to the technical field of primary loop water quality chemical monitoring of a pressurized water reactor nuclear power plant, and particularly relates to a mobile lithium ion concentration measurement device. The device comprises a shell, a regulating valve, a flow meter, a suppressor, a calibration cup, a UPS (Uninterrupted Power Supply), a universal wheel, a flow cell, a lithium ion electrode, a reference electrode, a reference electrode solution and a meter head. The mobile lithium ion concentration measurement device is simple to operate and rapid in analysis speed, and the mobile and on-line lithium ion concentration measurement can be implemented; by use of the electrochemical suppressor, the self-regeneration function is implemented, boric acid is effectively eliminated online and the influence of boric acid on lithium ion concentration measurement is avoided; and the problem of mobile monitoring or online monitoring of the lithium ion concentration in the primary loop water quality of the pressurized water reactor nuclear power plant is effectively solved.

Description

Technical field [0001] The invention belongs to the technical field of water quality chemical monitoring in the primary circuit of a pressurized water reactor nuclear power plant, and specifically relates to a mobile lithium ion concentration measuring device. Background technique [0002] The conventional PWR nuclear power plant primary circuit water quality lithium ion concentration analysis adopts manual sampling and laboratory offline analysis methods. The analysis methods used mainly include flame atomic absorption method, ion chromatography, and inductively coupled plasma emission spectrometry. [0003] However, due to the large amount of boric acid in the primary circuit water of nuclear power plants, the flame atomic absorption method and inductively coupled plasma emission spectrometry measure the lithium ion concentration of the primary circuit water quality. Due to the mismatch of the boric acid matrix, the analysis of the lithium ion concentration of boric acid is genera...

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Problems solved by technology

[0003] However, due to the large amount of boric acid in the water quality of the primary circuit of nuclear power plants, flame atomic absorption method and inductively coupled plasma emission spectrometry measure the concentration of lithium ions in the water quality of the primary circuit. interference effect

[0004] Ion chromatography analyzes the lithium ion concentration of the primary circuit water quality of nuclear power plants, which can effectively avoid the influence of boric acid on the measurement of lithium ion concentration, but the analysis time is long

Off-line analysis has long analysis time and slow analysis speed, and it is impossible to display in real time or track the change of lithium ion concentration in the primary circuit water quality of nuclear power plants for a long time, especially during the start-up stage of the unit or the lifting and lowering of the load. There is a problem of obvious lag in manual sampling ion line analysis

[0005] In order to meet the actual production needs such as continuous monitoring of lithium ion concentration in the primary circuit of nuclear power plants at critical moments or real-time online monitoring and viewing of changing trends, and to solve the problems of long offline analysis time, slow analysis speed, and serious lag of manual sampling, it is urgent to develop a The mobile lithium ion concentration monitoring device eliminates the influence of boric acid and realizes mobile online monitoring

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