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Method for separating boron and radionuclides in radioactive wastewater by using long flow passage

A technology for radioactive wastewater and radionuclides, applied in the field of radioactive wastewater treatment, can solve the problems of less than 30% boron removal rate

Inactive Publication Date: 2016-01-20
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In a typical reverse osmosis system, when the recovery rate reaches more than 80%, the boron removal rate is less than 30%

Method used

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  • Method for separating boron and radionuclides in radioactive wastewater by using long flow passage
  • Method for separating boron and radionuclides in radioactive wastewater by using long flow passage
  • Method for separating boron and radionuclides in radioactive wastewater by using long flow passage

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Embodiment Construction

[0024] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0025] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature relative to another element or feature shown in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described ...

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Abstract

The invention discloses a method for separating boron and radionuclides in radioactive wastewater by using a long flow passage. The method comprises the following steps: (1) setting a membrane stack, alternately arranging a plurality of anodes and cathodes in the membrane stack, and setting a cation exchange membrane and an anion exchange membrane between the anodes and the cathodes to form cathode chambers, anode chambers and fresh water chambers, wherein the adjacent anodes and cathodes form an electric field; (2) filling ion exchange resin into the anode chambers, the cathode chambers and the fresh water chambers; and (3) connecting the cathode chambers, the anode chambers and the fresh water chambers in series respectively to form three flow passages, and introducing the radioactive wastewater into the three flow passages, wherein borate ions in the fresh water chambers are migrated into the anode chambers under the action of the electric field and nuclide ions in the fresh water chambers are migrated into the cathode chambers, thereby separating boron and radionuclides in the radioactive wastewater in the fresh water chambers; and during separation, the ratio of the mean concentrations of boron in the anode chambers and the fresh water chambers in the same electric field is controlled to be not more than 35.

Description

technical field [0001] The invention relates to the field of radioactive waste water treatment, in particular to a method for separating boron and radionuclides in radioactive waste water by using a long flow channel. Background technique [0002] In traditional pressurized water reactor nuclear power plants, boron is used for reactive chemical compensation control, and the adjustment of boron concentration is completed by chemical volume control system (referred to as chemical volume system). During the operation of the power plant, a large amount of boron-containing waste liquid is produced due to the frequent operation of boron adjustment and chemical discharge. The discharged boron waste liquid is concentrated and purified by the boron recovery system, and then reused in the power plant. [0003] The boron recovery system was canceled in the design of the AP1000 nuclear power plant in the United States, and the boron in the coolant effluent was basically discharged into...

Claims

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Application Information

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IPC IPC(8): C02F1/469G21F9/12
Inventor 牛婷婷李福志王鑫赵璇陈斌张猛钱磊
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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