KR-20260062234-A - Mobile modular radioactive liquid waste disposal apparatus

KR20260062234AKR 20260062234 AKR20260062234 AKR 20260062234AKR-20260062234-A

Abstract

A mobile modular radioactive liquid waste treatment device is disclosed, which is manufactured as a mobile modular type to ensure mobility, thereby enabling high-speed processing of radioactive liquid waste regardless of location. A mobile modular radioactive liquid waste treatment device according to one aspect of the present invention may include: a mixing unit that provides wastewater, which is radioactive liquid waste, to one side and a chemical to the other side, which are transported together and mixed, and then provides mixed water to the next process; a separation unit that filters sludge as the mixed water from the mixing unit passes through, and provides the filtered primary treated water and sludge to different processes; and a desalination unit that passes the primary treated water through a plurality of filters until it becomes secondary treated water with electrical conductivity satisfying a certain value.

Inventors

유욱재
신현영
정소윤
박찬희
박규태
조보배
김성렬
오정민
이바로
김지웅
김혜진

Assignees

주식회사 오르비텍

Dates

Publication Date: 20260507
Application Date: 20241028

Claims (11)

A mixing unit that provides wastewater, which is radioactive liquid waste, on one side and a chemical on the other side, which are transported together and mixed, and then provides mixed water for the next process; A separation unit in which the mixed water from the above mixing unit passes through to filter the sludge, and the filtered primary treated water and sludge are provided to different processes, respectively; and A desalination unit comprising: providing the above-mentioned first treated water and passing it through a plurality of filters until it becomes second treated water with electrical conductivity satisfying a certain value; Mobile modular radioactive liquid waste treatment device.
In Article 1, A vehicle equipped with a driving force; and A container box equipped with and transported on the above vehicle, and having the mixing unit, separation unit, and desalination unit installed therein; comprising Mobile modular radioactive liquid waste treatment device.
In Article 2, The above container box consists of multiple units, Mobile modular radioactive liquid waste treatment device.
In Article 1, The above mixing unit is, A wastewater storage tank where wastewater is supplied and stored; A wastewater transfer pump that transfers wastewater from the above wastewater storage tank to the inlet of the mixing pipe by pressure; A drug tank where drugs are supplied and stored; A drug transfer pump that transfers the drug from the above drug tank to the inlet of the above mixing pipe by pressure; A mixing pipe comprising: a system in which the wastewater and chemicals flow into the inlet and are transported to be mixed with each other, and at the outlet, the wastewater and chemicals are completely mixed to form mixed water. Mobile modular radioactive liquid waste treatment device.
In Paragraph 4, The above mixing pipe is, A pipe body through which wastewater and chemicals are supplied and transported to the inlet; and A screw-type guide having continuous screw-shaped blades that are fixed inside the pipe body and allow wastewater and chemicals to pass through and collide with the blades to mix with each other. Mobile modular radioactive liquid waste treatment device.
In Article 5, A pH sensor provided at the outlet side of the above mixing pipe; and A return pipe that returns part or all of the mixed water to the inlet side of the mixing pipe according to the value detected by the pH sensor; comprising Mobile modular radioactive liquid waste treatment device.
In Article 1, The above separation part is, A membrane tank provided with the above-mentioned mixed water; A hollow fiber membrane member provided inside the above membrane tank, wherein sludge is filtered as the mixed water is pumped from the outside to the inside by suction pressure; A membrane suction pump for sucking filtered primary treated water inside the above hollow fiber membrane member; A sludge pump connected to one side of the above membrane tank to suck in and transport filtered sludge; A membrane backwash tank connected to the above membrane suction pump, in which a portion of the above primary treated water is stored; A backwash pump comprising: providing the first treated water of the above-mentioned membrane backwash tank in the backwash direction to backwash the sludge adsorbed on the outer surface of the hollow fiber membrane member by separating it from the membrane member; Mobile modular radioactive liquid waste treatment device.
In Article 7, A device including an air supply unit that supplies air in the opposite direction to the flow of the first treated water by the above-mentioned backwash pump. Mobile modular radioactive liquid waste treatment device.
In Article 1, A vacuum evaporator comprising a liquid sludge separated by the above-mentioned separation unit, which then evaporates moisture in a negative pressure environment to discharge the sludge in the form of a dry powder. Mobile modular radioactive liquid waste treatment device.
In Article 1, The above desalination unit is, A demineralized water supply tank that receives and stores primary treated water from the above separation unit; A first reverse osmosis high-pressure pump that pumps the first treated water from the above demineralized water supply tank so that filtering can be performed; A first reverse osmosis membrane in which filtering is performed while the first treated water is pumped by the above first reverse osmosis high-pressure pump; A first electrical conductivity meter that measures electrical conductivity so that when the treated water filtered through the first reverse osmosis membrane reaches a certain value, it is transferred to a demineralized water storage tank as the second treated water, and if it does not reach that value, secondary filtering can be performed again; An activated carbon fiber filter through which the first treated water is guided when the value measured by the first electrical conductivity meter above does not reach a certain value; A first reverse osmosis tank in which the first treated water that has passed through the above activated carbon fiber filter is supplied and stored; A second reverse osmosis high-pressure pump that pumps the treated water from the first reverse osmosis tank so that filtering can be performed; A second reverse osmosis membrane in which filtering is performed while treated water is pumped by the second reverse osmosis high-pressure pump; and A second electrical conductivity meter for measuring electrical conductivity to transfer the treated water, filtered through the second reverse osmosis membrane, to a demineralized water storage tank as the second treated water when it reaches a certain value; Mobile modular radioactive liquid waste treatment device.
In Article 10, A system comprising an electrodeionization (EDI) system that receives and treats the treated water when the electrical conductivity measured by the second electrical conductivity meter does not reach a certain value, Mobile modular radioactive liquid waste treatment device.

Description

Mobile modular radioactive liquid waste disposal apparatus The present invention relates to a mobile modular radioactive liquid waste treatment device, and more specifically, to a mobile modular radioactive liquid waste treatment device that is manufactured as a mobile modular type to ensure mobility, thereby enabling high-speed treatment of radioactive liquid waste regardless of location. From the first quarter of 2021 to the first quarter of 2022, 4,290,000 m³ of radioactive liquid waste was discharged from domestic nuclear power plants (Kori, Saeul, Hanbit, Hanul, and Wolseong), and 1,450 m³ of waste was discharged from research reactors (Korea Atomic Energy Research Institute). Radioactive liquid waste generated in this way is safely discharged after removing radionuclides through various chemical treatments. Radioactive liquid waste generated during nuclear power plant operation and planned preventive maintenance (overhaul) periods, such as the replacement of aging equipment and performance improvements, as well as radioactive liquid waste expected to be generated in significant quantities during decommissioning, also requires efficient treatment to ensure worker safety and prevent the spread of contamination. Decontamination and volume reduction technologies are applied to treat radioactive liquid waste, and it is predicted that a large amount of secondary waste, consisting of 103 drums of very low-level waste and 85 drums of low-level waste, will be generated from waste resin and waste filters for liquid waste treatment, based on 200 L drums, among the radioactive waste volume of Kori Unit 1 before volume reduction predicted through the 2016 source port assessment. Liquid scintillation counters (LSCs) filled with fluorescent liquid are used to analyze beta radionuclides in nuclear power plants as well as in radioactivity analysis facilities, and are stored on-site as radioactive waste liquid after use. As of June 2021, there are a total of 170 drums of radioactive waste liquid containing radioactivity stored at nuclear power plants, based on 200 L drums. Although the client has announced a service to process this, the bids have been unsuccessful due to a lack of appropriate processing technology. Recently, as part of the government's push for nuclear power promotion and carbon neutrality policies, the demand for technology for mobile processing facilities capable of rapidly and safely processing liquid waste generated from nuclear power plants is expected to increase. FIG. 1 is an external side view of a mobile modular radioactive liquid waste treatment device having secured mobility according to one embodiment of the present invention. FIG. 2 is a diagram showing the configuration of a mixing section and a separation section, which are some components of a mobile modular radioactive liquid waste treatment device according to one embodiment of the present invention. FIG. 3 is a diagram showing the configuration of a desalination unit, which is a component of a mobile modular radioactive liquid waste treatment device according to one embodiment of the present invention. FIG. 4 is a cross-sectional view of a mixing pipe of a mobile modular radioactive liquid waste treatment device according to one embodiment of the present invention. FIG. 5 is a front view of a hollow fiber membrane member of a separation unit, which is a component of a mobile modular radioactive liquid waste treatment device according to one embodiment of the present invention. FIG. 6 is an example diagram of the operation of a hollow fiber membrane member, which is a component of a mobile modular radioactive liquid waste treatment device according to one embodiment of the present invention. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components. The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention. In this specification, te