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Chloride ion concentration determining method in nuclear power plant waste liquid treatment system and application thereof

A waste liquid treatment system, chloride ion concentration technology, applied in chemical method analysis, chemical analysis by titration method, measuring device, etc., can solve problems such as injury to experimenters, easy damage to chromatograph, complex components, etc.

Inactive Publication Date: 2019-08-09
LINGDONG NUCLEAR POWER +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution in the TEU system is complex and highly radioactive, so manual titration is difficult to identify the titration end point, and it is easy to cause injury to the experimenter; the use of anion chromatography is also very easy to damage the chromatograph

Method used

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  • Chloride ion concentration determining method in nuclear power plant waste liquid treatment system and application thereof
  • Chloride ion concentration determining method in nuclear power plant waste liquid treatment system and application thereof
  • Chloride ion concentration determining method in nuclear power plant waste liquid treatment system and application thereof

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Embodiment

[0051] The steps of present embodiment measuring the chloride ion concentration of TEU001EV sample are as follows:

[0052] (1) Provide a concentration of 0.01mol / L (C 0 ) silver nitrate solution and concentration is the sodium chloride standard solution of 1000mg / Kg, with above-mentioned sodium chloride standard solution, above-mentioned silver nitrate solution is titrated, according to the concentration (1000mg / Kg) of the sodium chloride standard solution used, The consumption (ml) of sodium chloride solution, the concentration (0.01mol / L) of silver nitrate solution, the sampling amount (g) of silver nitrate solution and the molar mass of chlorine (g / mol, get 35.453), calculate silver nitrate The titer of the solution T 0 .

[0053] (2) Weigh an appropriate amount of a plurality of samples to be tested (respectively denoted as S1~S3) from the TEU001EV system, and add an appropriate amount (1.6% to 4% of the volume of the sample to be tested) of concentrated nitric acid (ma...

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Abstract

The invention relates to the technical field of waste liquid treatment in a mega-kilowatt nuclear power plant, in particular to a chloride ion concentration determining method in a nuclear power plantwaste liquid treatment system and application thereof. The method comprises the following steps of providing a silver nitrate standard solution and a sodium chloride solution with the known concentration; determining the titer of the silver nitrate standard solution on the sodium chloride solution; weighing the mass of a sample to be tested; adding a proper amount of nitric acid; titrating the sample to be tested by a potentiometric titrator and by using the nitric acid standard solution as a titrant so as to obtain a titration curve and the volume of the consumed silver nitrate standard solution for the titration end point potential; and calculating the concentration of chloride ions in the sample according to the concentration of the silver nitrate standard solution, the titer, the massof the sample to be tested and the volume of the consumed silver nitrate standard solution. The method can be used for determining the chloride ion concentration in complicated components of a nuclear power plant TEU evaporator; the defect of inaccurate titration end point judgment during the manual titration is overcome; the work intensity of test personnel is reduced; and safety, convenience and high speed are realized.

Description

technical field [0001] The invention relates to the technical field of waste liquid treatment of mega-kilowatt nuclear power plants, in particular to a method for measuring chloride ion concentration in a waste liquid treatment system of a nuclear power plant and an application thereof. Background technique [0002] In nuclear power plants, the effluent treatment system (TEU) is used to collect waste from the nuclear island exhaust and water delivery system (RPE), boron recovery system (TEP), solid waste treatment system (TES), effluent discharge system (TER ) and non-reusable waste liquid in the radioactive waste water recovery system (SRE), and a system for their storage, monitoring and treatment. Chloride ions in the waste liquid will destroy the oxide film on the surface of metal equipment such as TEU evaporators, resulting in stress corrosion of metal equipment, penetrating cracks and traces, which are very harmful to the equipment, so it is necessary to monitor and ana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
CPCG01N31/164
Inventor 黄林孙其良赵志军吕传君裴兴万
Owner LINGDONG NUCLEAR POWER
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