KR102547243B1 - Water chemistry simulation apparatus of primary system - Google Patents

Abstract

A high-temperature and high-pressure system for maintaining a set temperature condition in which a test specimen is mounted; Chemical condition control system for controlling and maintaining corrosion water chemical conditions for simulation; A pure water supply purification system for supplying purified and microbial-removed system water; and a primary system water chemistry simulation device including an instrumentation and control system for measuring the water quality environment on the chemical condition control system.

Description

Water chemistry simulation apparatus of primary system}

The present invention relates to an apparatus for simulating primary system water chemistry of a nuclear power plant.

In realizing the primary system environment of a nuclear power plant, a device that can maintain the same conditions (pressure, temperature, chemical conditions, etc.) is required. For example, nuclear power plant water chemistry optimization technology is needed through simulation of the primary system environment (300℃, 150 bar) of a nuclear power plant to analyze the characteristics and behavior of corrosion products generated during power plant operation. However, in order to remove dissolved oxygen, it is controlled through nitrogen control injection, but the corrosion conditions change due to the absence of dissolved hydrogen, and it is difficult to control and completely remove dissolved oxygen.

Korean Patent Registration No. 10-2215869

The problem to be solved by the present invention is to provide a primary system water chemistry simulation device that can maintain the same conditions (eg, pressure, temperature, chemical conditions, etc.) in implementing the primary system environment of a nuclear power plant.

In addition, it is to provide a primary system water chemistry simulation device capable of optimizing nuclear power plant water chemistry through analysis of the characteristics and behavior of corrosion products generated during power plant operation through simulation of the primary system environment (eg, 300 ° C, 150 bar) of a nuclear power plant.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

The primary system water chemistry simulation device according to one aspect of the present invention for achieving the above object is equipped with a test specimen, a high-temperature and high-pressure system for maintaining a set temperature condition; Chemical condition control system for controlling and maintaining corrosion water chemical conditions for simulation; A pure water supply purification system for supplying purified and microbial-removed system water; And it may include a measurement control system for measuring the water quality environment on the chemical condition control system.

In addition, the high-temperature and high-pressure system may include an autoclave, a high-pressure pump, and a heat exchanger.

In addition, the autoclave includes a control panel for controlling the autoclave and a zirconium heater for adjusting the internal temperature of the autoclave, but the autoclave can be used at a maximum temperature of 650 ° C. there is.

In addition, the autoclave is provided with a sample port in which samples for processing (eg, corroded food, etc.) can be mounted and detached. It could be possible.

In addition, the autoclave is provided with an opening and closing part for opening and closing the inside, and the opening and closing part may include a polycarbonate material for preventing vapor burns.

In addition, the chemical condition control system may include a metering/micro pump and a gas mixing column.

In addition, the measurement control system includes a measuring means for measuring electrical conductivity (conductiv), hydrogen concentration index (pH, potential of hydrogen), dissolved oxygen (DO), and dissolved hydrogen (DH). can do.

In addition, it further includes a hydrogen generator for hydrogen injection, wherein the hydrogen generator detects the flow of hydrogen on the pure water tank and the line in which the water produced in the pure water producer is stored, and the hydrogen flow is the maximum for a set time. When flowing at a flow rate, it is determined that water leakage occurs and the operation of the hydrogen generation timing may include a flow detection unit for turning off.

In addition, the hydrogen generator may further include a pressurization device for dissolving the generated hydrogen in the system, and the pressurization unit may control the concentration of dissolved hydrogen in the system with the set pressure.

also. The pressurization device of the hydrogen generator may be capable of controlling the concentration of dissolved oxygen in the system using the set pressure.

In addition, the hydrogen purge system further includes a hydrogen purge system for preventing exposure of the hydrogen to oxygen, the hydrogen purge system is a nitrogen pressurizing device for purging hydrogen inside by injecting nitrogen into the outside, and the nitrogen or the A purge pipe serving as a guide for discharging hydrogen may be included.

In addition, it further includes a dissolved analysis unit for analyzing at least one of dissolved oxygen and dissolved hydrogen, wherein the dissolved analysis unit is provided with an in-line port and an out-line port, and nitrogen It is always supplied, and a solenoid valve is provided in the outline port, and nitrogen purge (n2 purge) can be performed whenever the analysis is performed.

According to the primary system water chemistry simulator of the present invention as described above, there are one or more of the following effects.

According to the present invention, it is possible to provide a primary system water chemistry simulation device that can maintain the same conditions (eg, pressure, temperature, chemical conditions, etc.) in implementing the primary system environment of a nuclear power plant.

In addition, it is possible to provide a primary system water chemistry simulation device capable of optimizing nuclear power plant water chemistry through analysis of the characteristics and behavior of corrosion products generated during power plant operation through simulation of the primary system environment (e.g., 300 ° C, 150 bar) of a nuclear power plant. .

1 is a configuration diagram showing the configurations of a primary system water chemistry simulation device according to an embodiment of the present invention.
Figure 2 is a configuration diagram showing some of the configurations according to Figure 1;
FIG. 3 is a diagram schematically showing some of the configurations according to FIG. 1 .
Figure 4 is a view schematically showing the configuration of the autoclave among the configurations according to Figure 1.
5 is a diagram schematically showing the configuration of an autoclave among the configurations according to FIG. 1.
6 is a diagram schematically showing the configuration of an autoclave among the configurations according to FIG. 1.
7 is a diagram schematically showing a configuration of a hydrogen generator among configurations according to FIG. 1 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

The spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between elements or components and other elements or components. Spatially relative terms should be understood as encompassing different orientations of elements in use or operation in addition to the orientations shown in the figures. For example, when flipping elements shown in the figures, elements described as “below” or “beneath” other elements may be placed “above” the other elements. Thus, the exemplary term “below” may include directions of both below and above. Elements may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Although first, second, etc. are used to describe various elements, components and/or sections, it is needless to say that these elements, components and/or sections are not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Accordingly, it goes without saying that the first element, first element, or first section referred to below may also be a second element, second element, or second section within the spirit of the present invention.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is present in the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those skilled in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components regardless of reference numerals are given the same reference numerals, Description will be omitted.

1 is a configuration diagram showing the configurations of a primary system water chemistry simulator (hereinafter, referred to as “simulator 100”) according to an embodiment of the present invention.

Referring to FIG. 1, the simulation device 100 includes a high-temperature and high-pressure system 110, a chemical condition control system 120, a pure water supply purification system 130, an instrument control system 140, a hydrogen generator 150, and a hydrogen purge system. It may include a system 160 and a dissolved analysis unit 170.

Here, the high temperature and high pressure system 110 may include an autoclave 111, a high pressure pump 112 and a heat exchanger 113. The chemical condition control system 120 may include a meter/micro pump 121 and a gas mixing column 122.

The measurement control system 140 may include a measuring means 141 . The hydrogen generator 150 may include a pure water tank 151, a flow detection unit 152, and a pressurization device 153. The hydrogen purge system 160 may include a nitrogen pressurization device 153 and a purge pipe 162. The dissolved analyzer 170 may include an in-line port 171 and an outline port 172.

The chemical condition control system 120 is for controlling and maintaining corrosion water chemical conditions for simulation. The chemical condition control system can control and maintain corrosion water chemical conditions for experiments such as chemicals and gases.

The chemical condition control system 120 may include the metering/micropump 121, the gas mixing column 122, and the like. The pure water supply purification system 130 may supply purified and microorganism-removed system water on the simulation device 100.

The pure water supply purification system 130 may be provided with an ultrapure water supply system for supplying the system water. The measurement control system 140 may measure the water quality environment on the chemical condition control system 120 .

The measuring means 141 of the measurement control system 140 measures electrical conductivity (conductiv), hydrogen concentration index (pH, potential of hydrogen), dissolved oxygen (DO), and dissolved hydrogen (DH). can measure

Corresponding to these listed measurement items, a plurality of measurement items or at least some of the listed measurement items provided in a single number may be measured in multiple numbers.

The pressurization device 153 of the hydrogen generator 150 can control the concentration of dissolved oxygen in the system using the set pressure. The hydrogen purge system 160 is to prevent exposure of the hydrogen to oxygen.

The nitrogen pressurization device 161 of the hydrogen purge system 160 may inject nitrogen into the hydrogen purge system 160 to purge hydrogen present therein to the outside.

The purge pipe 162 of the hydrogen purge system 160 may serve as a guide for discharging the nitrogen or the hydrogen. The dissolved analyzer 170 is for performing analysis of at least one of dissolved oxygen and dissolved hydrogen on the simulation device 100 .

Nitrogen may be constantly supplied to the in-line port 171 and the out-line port 172 of the dissolved analyzer 170 . A solenoid valve may be provided in the outline port 172 . The dissolved analyzer 170 may perform a nitrogen purge (n2 purge) whenever the analysis is performed.

Nitrogen may always be supplied to the dissolved analyzer 170 to measure dissolved hydrogen. The in-line port and the outline port may be located on the side. Since a sol valve is attached to the outline port side, nitrogen purge can be performed whenever a single measurement is made.

2 to 3, the high-temperature and high-pressure system 110 may be equipped with a test specimen. The high-temperature and high-pressure system 110 can maintain the set temperature conditions on the simulation device 100 and the high-temperature and high-pressure system 110.

In more detail, the high-temperature and high-pressure system 110 is a system in which a test specimen is mounted and can maintain conditions of 150 bar and 300 °C. To this end, the commercial high-temperature and high-pressure system 110 may include the autoclave 111, the high-pressure pump 112, and a heat exchanger 113.

Referring to FIGS. 4 to 6 , the autoclave 111 may be used at a maximum temperature of about 650° C. In the sample port 1113 of the autoclave 111, the autoclave 111 is capable of mounting and detaching samples for processing.

In the sample port, the sample is located at the top (out-line) of the autoclave 111, so that the sample can be more freely handled and replaced. The autoclave 111 may be provided with a temperature sensor 1117 to measure the temperature of the autoclave 111 .

The autoclave 111 may be provided in plurality. Each of these autoclaves 111 may be provided with a needle valve 1114. Selective or overall use of the autoclaves 111 may be possible through the needle valve 1114.

The needle valves 1114 are mounted on the front and rear ends of the autoclave 111 and can be used as a whole or individually as needed.

The opening and closing part 1115 of the autoclave 111 is for opening and closing the inside in relation to fluid movement of the autoclave 111 . The opening and closing part 1115 may be made of a polycarbonate material for preventing vapor burns.

Referring to FIG. 7 , the hydrogen generator 150 is for injecting hydrogen into a hydrogen demand place. The pure water tank 151 of the hydrogen generator 150 may store water produced in the pure water producer.

The flow detection unit 152 of the hydrogen generator 150 may detect the flow of hydrogen on the line. The flow detection unit 152 determines that a leak occurs when the flow of hydrogen flows at the maximum flow rate for a set time, and operates the hydrogen generator 150 immediately or for a set time (eg, after about 20 minutes, etc.) can be turned off.

Although the embodiments of the present invention have been described with reference to the above and accompanying drawings, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

110: high temperature and high pressure system
120: chemical condition control system
130: pure water supply purification system
140: instrumentation control system
150: hydrogen generator
160: hydrogen purge system
170: dissolved analysis unit

Claims (6)

A high-temperature and high-pressure system for maintaining a set temperature condition in which a test specimen is mounted;
Chemical condition control system for controlling and maintaining corrosion water chemical conditions for simulation;
A pure water supply purification system for supplying purified and microorganism-removed system water; and
Including a measurement control system for measuring the water quality environment on the chemical condition control system,
The high-temperature and high-pressure system includes an autoclave, a high-pressure pump, and a heat exchanger,
The autoclave,
A control panel for controlling the autoclave and a zirconium heater for controlling the internal temperature of the autoclave,
The autoclave is provided with a sample port in which samples for processing can be mounted and detached,
The autoclave is provided in plurality, and can be used selectively or entirely through needle valves provided respectively. According to claim 1,
The chemical condition control system includes a metering / micropump and a gas mixing column. delete delete delete delete

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