KR101682161B1 - System for automatically on-line monitering radon in water - Google Patents

Abstract

The present invention relates to an automatic measurement and monitoring system for radon concentration. The present invention relates to a water supply system including a water supply unit including a first valve assembly, which is a solenoid valve disposed on a pipe connected to a water source and opens / cut off a pipe, and a pump disposed on the pipe and pumping water from a water source; A measuring unit for measuring a gamma ray generated from the radium contained in the water supplied by the water supply unit; Water is sampled by transmitting a signal to the water supply unit and the measurement unit to drive the pump of the water supply unit and the radon concentration is measured by the gamma dose analyzing the measured radiation data of the measurement unit to determine whether or not the reference value is exceeded, A controller for supplying or blocking water to the measuring unit from the water supply unit according to the control signal; And a transmission / reception unit capable of transmitting / receiving data of the control unit to / from the server in a wired or wireless manner.

Description

[0001] The present invention relates to a water-quality radon concentration monitoring system,

The present invention relates to a system and a method for automatically monitoring and measuring radon in water in real time, and more particularly, to a system and a method for monitoring radon in water by measuring the amount of gamma rays generated from radium contained in a liquid sample, And transmits the resultant value to a remote server to monitor the presence or absence of radon contamination of water in real time from a remote place.

Radioactive radon is a colorless and odorless gas, which flows into the room through cracks in the floor or wall of the house in the soil. It is known as a first-level carcinogen that enters the human body through the respiratory tract and causes lung cancer.

Radon is an atomic symbol Rn, with an atomic number of 86, which is an inert gaseous element with strong radiation, produced by radium (Ra) in the radioactive decay chain of uranium and thorium. The radon present in nature is almost exclusively 222 Rn with a mass number of 222 (half-life is 3.82 days). Radon is a health hazardous gas because of the radiation emitted, and the US Environmental Protection Agency warns that radon inhalation is the leading cause of lung cancer following smoking.

In the United States and other countries around the world, radon concentration standards have been established (in the case of the United States, 148 becquerels per cubic meter of the measures required for housing repairs), and 21 countries such as underground history, We have set indoor radon recommendation standards for facilities and schools at 148 becquerels per cubic meter (Picocurie Bq.4).

However, there is no radon standard in Korea for drinking water, and the drinking water standard of the United States is set at 4,000 picocuria per liter.

Recently, in the Ministry of Environment of the Ministry of Environment, the concentration of radioactive radon in the water was measured in 459 places nationwide, and 75 of them were detected to be 8.2 times more than the US standard, which is a fatal carcinogen causing lung cancer and stomach cancer Confirmed. Therefore, it is necessary to take measures to reduce the internal radiation dose of radioactivity by monitoring the concentration of radioactive radon in the school district, which is a natural radioactive material dissolved in ground water, and drinking water from the farmhouse and farmers using groundwater for winter heating to be.

However, with current technology, it is possible to measure the concentration of radioactive material in the air in real time, but there is a problem in that it is technically impossible to measure radon in the water of a water source such as ground water, river, and lake.

Patent Application No. 10-2000-0024989 (titled: Online Radon Concentration Measurement System)

Disclosure of the Invention The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for estimating radon concentration by measuring the amount of gamma rays generated from radium contained in water of drinking water sources such as groundwater, The present invention also provides a system capable of real-time monitoring of water contamination by radon by transmitting the measured result to a server by wire / wireless method.

In order to accomplish the above object, an embodiment of the present invention provides a method of operating a water pump including a first valve assembly, which is a solenoid valve disposed on a pipe connected to a water source to open / shut off a pipe, a pump disposed on the pipe, A water supply unit including a water supply unit;

A measuring unit for measuring a gamma ray generated from the radium contained in the water supplied by the water supply unit;

Water is sampled by transmitting a signal to the water supply unit and the measurement unit to drive the pump of the water supply unit and the radon concentration is measured by the gamma dose analyzing the measured radiation data of the measurement unit to determine whether or not the reference value is exceeded, A controller for supplying or blocking water to the measuring unit from the water supply unit according to the control signal; And

And a transmission / reception unit capable of transmitting / receiving data of the control unit to / from the server in a radio or wireless manner.

Another embodiment of the present invention is a spectrometer comprising: a metering section for measuring gamma rays generated from radium contained in supplied water;

A water supply unit connecting the inlet of the measuring unit and the water source to supply the water stored in the water source to the measuring unit;

A washing water supply unit connected to an inlet side of the measuring unit and supplying washing water to the measuring unit;

Water is sampled by sending a signal to the water supply unit, the measurement unit, and the wash water supply unit to drive the pump of the water supply unit, and the measured radiation data of the measurement unit is analyzed to measure the radon concentration by the gamma dose. And a controller for selectively supplying or blocking the water supplied to the measuring unit from the water supply unit and the wash water supply unit according to the determination;

The water supply unit may include a first valve assembly capable of shutting off water flowing to the measuring unit, and the washing water supply unit may block the washing water flowing to the measuring unit, A second valve assembly,

The control unit selectively drives the first and second valve assemblies to shut off the first valve assembly when the data exceeds a reference value and to open the second valve assembly to allow the wash water to be supplied to the metering unit And a radon concentration automatic measurement and monitoring system capable of storing the polluted water by opening the third valve assembly.

According to still another embodiment of the present invention, there is provided a water supply system comprising: a water supply step of taking a sample from a water source by a water supply unit and supplying the sample to a measurement chamber;

The controller of the control unit transmits a signal to the measurement sensor of the measurement chamber to measure a gamma dose generated from the radium contained in the sample and transmit the measured gamma dose to the control unit;

The control unit analyzes the gamma dose data to infer the radon concentration and compares the reference value set for the radon concentration with the actual radioactivity concentration data of the measurement chamber received from the logger unit. As a result of comparison, if the actual radon concentration exceeds the reference value The controller sends a signal to the washing water supply unit to perform a washing step;

A washing step of washing the measurement chamber by driving the washing water supply part in the contamination; And

And a storage step of storing the polluted water discharged from the measurement chamber by the polluted water storage part.

When the measurement chamber is contaminated, the control unit transmits a signal to the first valve assembly on the pipe connecting the water source and the water supply unit to shut off the supply of the sample to the measurement chamber, Automatic measurement of the radon concentration capable of storing the polluted water by transmitting and opening the washing water to the measuring chamber by transmitting a signal to the second valve assembly to open and sending a signal to the third valve assembly connected to the contaminated water storage tank, Provides a monitoring method.

The automatic radon concentration measurement and real-time monitoring system and method according to the embodiment of the present invention have the following advantages.

First, a certain volume of space is provided in a measurement chamber provided with a measurement sensor, and water supplied from a water source such as a ground water intake point and a river or a lake can be stored in this space. By measuring the concentration of radon radon from the measured radon radon concentration, it is possible to monitor the radon contamination status of the water source in the remote place by transmitting the measured data to the remote site server.

Second, a valve assembly is disposed in a water supply part for supplying a sample and a wash water supply part for supplying wash water, and by selectively opening and closing the valve assembly by a control part, when the concentration of radon in water is lower than a reference value, If the concentration exceeds the reference value, the contamination state of the measurement unit can be effectively removed by performing the cleaning with the wash water supply unit.

Third, the contaminated water can be stored in the radon contaminated water storage tank, and detailed analysis of the underwater radon can be carried out through reanalysis.

Fourth, a control unit for controlling the radioactivity measurement of radium, the radon of the radon, and the process of analyzing the daughter radon is composed of a logger unit, a storage unit, an alarm unit, and a controller. The concentration of radon in water can be efficiently measured.

1 is a schematic view showing a structure of an automatic radon concentration measuring and monitoring system according to a preferred embodiment of the present invention.
FIG. 2 is a schematic view showing the structure of the flow rate regulator shown in FIG. 1. FIG.
FIG. 3 is a diagram showing the structure of the control unit shown in FIG. 1 by modules.
FIG. 4 is a flowchart sequentially illustrating processes of an automatic measurement and monitoring method of radon concentration according to a preferred embodiment of the present invention.
FIG. 5 is a flowchart showing the radon concentration measurement and monitoring process shown in FIG. 4 in more detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an automatic radon concentration measurement and real-time monitoring system according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the automatic radon concentration measuring and monitoring system 1 proposed by the present invention includes a water supply unit 5 for collecting water from a water source 3 by a pump 13, )Wow;

A measuring unit 7 for measuring a concentration of radon by measuring a gamma ray emitted from radium which is a seed of radon contained in water supplied by the water supply unit 5;

The water supply section 5 and the metering section 7 are controlled so as to collect water by the water supply section 5, measure the radioactivity by the metering section 7 and discharge the water, A control unit 9 for analyzing the amount of radon which is a daughter nucleus from the radioactivity data to determine whether or not the reference value is exceeded and for supplying or shutting water to the measuring unit 7 in the water supplying unit 5 according to the judgment; And

And a transmission / reception unit 10 capable of transmitting / receiving data of the control unit 9 to / from the server S in a wired or wireless manner.

In the automatic radon concentration measuring and monitoring system (1) having such a structure, the water supply unit (5) collects a predetermined amount of water from a water source such as a wastewater treatment plant or a river, a lake, And then supplied to the measuring chamber 15 of the measuring unit 7, which will be described later.

The water supply unit 5 includes a first valve assembly (not shown) disposed on a pipe L connected to a water source such as a groundwater collection source or a river and a lake to open / V1); And a pump 13 disposed on the pipe L for pumping a predetermined amount of water from the water of the water source to obtain a sample and supplying the pumping water to the measuring unit 7. [

The first valve assembly V1 may be a solenoid valve, although various types of valves may be used. The first valve assembly V1 may be turned on or off by a signal of the controller 9 by being connected to the controller 9. [

That is, when the sample is taken, the first valve assembly V1 is turned on by the signal of the controller 9 to open the pipe L so that the water of the water source flows into the pipe L.

After the first valve assembly V1 is opened for a predetermined time, the first valve assembly V1 may be disconnected by a signal from the control unit 9. [ Therefore, the control unit 9 can appropriately adjust the amount of the sample to be sampled by controlling the ON / OFF time of the first valve assembly V1.

In addition, the first valve assembly V1 can also be shut off in the following cases. That is, when the measured concentration of the radon exceeds the reference value, the measuring chamber 15 is washed for re-measurement. At this time, the second valve assembly V2, which will be described later, is opened to supply the washing water into the measuring chamber 15 When the second valve assembly V2 is opened, the first valve assembly V1 is turned off and the pipe L can be shut off.

One side of the pump 13 is connected to the pipe L of the water source, and the other side is connected to the inlet of the measurement chamber 15. Therefore, the water of the water source is sucked through the pipe L by the suction force generated when the pump 13 is driven, and then discharged and supplied to the measurement chamber 15 of the measurement unit 7. [

At this time, the pump 13 is connected to the control unit 9 so that the driving of the pump 13 can be controlled by a control signal.

In this way, the water stored in the water source can be sucked by the driving of the pump 13 and supplied to the measuring chamber 15 of the measuring unit 7. At this time, the opening time of the first valve assembly V1 is adjusted The amount of sample is adjustable.

The water supply unit 5 may further include a filtration unit 5 to remove foreign substances contained in the sample.

That is, in the case of a water intake facility or a water treatment plant using water resources of a water quality of 1 or more, such a filtration part (5) may be unnecessary, but the water quality of a river, a reservoir and a dam may fall below 2 A filtering unit 5 may be required to remove foreign substances such as suspended solids (SS).

Such a filtration portion 19 preferably includes a filter and is disposed on the pipe L. [ Therefore, the filtration unit 5 can efficiently remove the foreign matter by filtering the sample flowing through the pipe L.

The water supply unit 5 may further include a flow rate controller 21 for controlling the flow rate of the sample flowing into the measurement chamber 15.

That is, since the amount of the sample supplied to the measurement chamber 15 varies depending on the topographical characteristics (elevation) of the water source such as the intake / purification plant, the arrangement of the pump 13, or the position of the measurement chamber 15, The flow rate can be kept constant.

The flow regulator 21 preferably includes a three-way valve system. 2, the flow rate regulator 21 includes an inlet 23 connected to a pipe L to which a sample is supplied; A first outlet 25 for discharging the supplied sample to the measurement chamber 15; A second outlet 27 for discharging the supplied sample to the bypass pipe L1; And an opening / closing plate 29 hingedly provided inside the flow regulator 21 for selectively opening and closing the first and second outlets 25 and 27.

The flow rate regulator 21 having the above-described structure can appropriately adjust the flow rate of the sample by varying the opening angle of the opening / closing plate 29.

The relationship between the opening and closing plate 29 and the opening angle will be described below as an example.

Opening and closing plate opening angle Measuring chamber inflow Bypass amount 90 degrees 100 0 70 degrees 77 23 45 degrees 50 50 20 degrees 23 77 0 degrees 0 100

As can be seen from the above table, the amounts of the samples supplied to the measurement chamber 15 and the bypass pipe L1 through the flow controller 21 are inversely proportional to each other.

As described above, the sample can be supplied to the measuring unit 7 by being pumped by the pump 13 of the water supply unit 5. [

The measuring unit 7 can estimate the amount of radon by analyzing gamma rays from the radium present in the sample.

More specifically, the measuring unit 7 includes a measurement chamber 15 in which a sample is stored; A sample inlet 17 provided at one side of the measurement chamber 15 to supply a sample; A sample discharge port 31 provided on the other side of the measurement chamber 15 and discharging the measured sample; And a measurement sensor 33 provided inside the measurement chamber 15 for measuring gamma rays emitted from the radium in the sample.

The measurement chamber 15 has a predetermined volume therein. The sample injected through the sample inlet 17 is stored in the measurement chamber 15. A plurality of lead blocks 35 are stacked on the outer side of the measurement chamber 15 to form a radiation shielding film.

Therefore, it is possible to prevent the environmental radiation or artificial radiation that can be transmitted from the outside of the measurement chamber 15 from being transmitted to the inside of the measurement chamber 15 by being shielded by the radiation shielding film.

The sample discharge port (31) is connected to the discharge pipe (L2), so that the sample whose radiation measurement is completed can be discharged through the discharge pipe (L2). At this time, the valve assembly V4 is disposed in the discharge pipe L2 to control the flow of the discharged sample.

The measurement sensor 33 analyzes the radon concentration of radon by measuring gamma rays generated from radium contained in the liquid sample.

The measurement sensor 33 includes a sensor capable of measuring the radioactivity of various nuclides. For example, a gamma ray measurement sensor 33 is proposed. The gamma ray measuring sensor 33 refers to a scintillation counter or a semiconductor detector using an inorganic scintillating material.

Typically, the scintillation counter is composed of a scintillator that emits light when the radiation is incident, and a photomultiplier tube that converts the light emission into an electrical signal and multiplies it.

Radiation interacts with the scintillating material in the detector and photons generated by the photons are directed to the cathode to generate photoelectrons. The photoelectrons are multiplied through the diode group of the booster tube and finally collected on the anode to form charge pulses.

At this time, the scintillation counter uses NaI (TI), which is a inorganic scintillation material, and NaI (TI) is used as a standard scintillation material for gamma ray spectroscopy because of its high light yield and almost linear response to electrons and gamma rays.

Of course, inorganic scintillating materials as well as inorganic scintillating materials can be used.

The gamma ray density value measured by the measurement sensor 33 may be transmitted to the controller 9 for classification, analysis, storage, alarm generation, remote data transmission, and the like.

The control unit 9 includes a logger unit 39 for classifying / analyzing the gamma-ray data of the radium transmitted from the measuring unit 7 by the radioactivity analysis program to the nuclear species to infer the concentration of radon, and;

A storage unit (41) for storing data processed by the logger unit (39);

An alarm unit 45 for generating an alarm when the concentration of radon exceeds a reference value;

A PLC (programmable logic controller) 47 for controlling the system by transmitting and receiving signals with the units, determining whether the data exceeds a reference value, and instructing the storage of data.

In the control unit 9 having such a structure, the logger unit 39 performs a self-test mode in an initial state to check whether there is a normal operation, and switches to a measurement mode in which data can be processed if there is no abnormality.

In this measurement mode, the logger unit 39 classifies / analyzes the radiation data measured by the measurement sensor 33 into nuclear species.

For example, the logger unit 39 classifies / analyzes the transmitted radium radiation data into nuclear species to analyze the amount of radon, which is a daughter nuclear species.

Namely, radium is an alkaline earth metal that releases α-, β-, and γ-rays, and alpha decays to radon, a radioactive gas. In this process, the radium, which is the mother nucleus, is converted into radon, which is a daughter nucleus, by emitting gamma rays. By analyzing this gamma dose, radon concentration can be deduced.

Therefore, the gamma dose data can be analyzed from the radium radiation data measured by the measurement sensor 33, and the concentration of radon can be estimated and analyzed by the gamma dose data.

Further, the logger unit 39 measures the environmental data around the measurement chamber 15 and sets the radiation baseline value (Background limit).

The data analysis result is transmitted to the controller 47. The controller 47 provides the data to the storage unit 41 and stores the data and determines whether the reference value is exceeded by the judgment program of the controller 47 itself.

More specifically, the storage unit 41 stores the data provided by the logger unit 39 by time or by day. At this time, the data storage format can be various formats, but is preferably stored in a text file format.

The storage of such data is preferably stored at the same cycle as the data measurement period of the logger unit.

The controller (aka server PC) 47 calculates data provided from the logger unit 39 to determine whether the radon concentration of each nuclide exceeds the allowable reference value.

More specifically, the controller 47 determines whether or not the reference value is exceeded by calculating the nuclear species data provided from the logger unit 39 by a preset contamination degree determination program.

At this time, each nuclear species reference value is inputted in advance, and one example is shown by the following table.

The controller 47 compares the radon concentration data derived from the radium concentration data of the measurement chamber 15 received from the logger unit 39 with a reference value set for each radionuclide type as described in the above table.

As a result of the comparison, if it is determined that the actual radon concentration data exceeds the reference value, the controller 47 transmits a signal to the alarm unit 45.

The alarm unit 45 generates an alarm when a signal indicating that the reference value is exceeded is received. At this time, the alarm may be generated in various forms, such as an alarm sound through a speaker, a light emission through a warning light, and a warning message output on a monitor.

The administrator can recognize that the radon concentration of the sample has exceeded the standard value by such an alarm.

On the other hand, when the radon concentration exceeds the reference value, it means that the measurement chamber 15 is contaminated. Therefore, it is necessary to discharge the contaminated water to the contaminated water storage tank 60 and clean the measurement chamber 15 again.

Therefore, the signal is transmitted to the first valve assembly (V1) to be closed, thereby preventing the sample from being additionally supplied to the measurement chamber (15).

The controller 47 sends a signal to the wash water supply unit 50 to supply the wash water to the measurement chamber 15 to allow the contaminated radioactive material to flow out of the measurement chamber 15. At this time, the outflowed polluted water can be stored in the polluted water storage tank (60).

The washing water supply unit 50 includes a washing water storage tank 52 connected to the inlet of the measuring unit 7 to store washing water; A pump 13 for supplying wash water stored in the wash water storage tank 52 to the measurement unit 7; And a second valve assembly (V2) disposed between the wash water storage tank (52) and the metering section (7) to control the flow of wash water.

Therefore, washing water is pumped and supplied to the measuring chamber 15, and the washing process can be repeated to efficiently clean the inside of the measuring chamber 15.

After the contaminated sample is discharged from the measurement chamber 15, the controller 47 closes the fourth valve assembly V4 and sends a signal to the third valve assembly V3 of the contaminated water storage portion 60 The pipe L3 connected to the contaminated water storage tank 62 can be opened.

Therefore, the sample flowing out of the measurement chamber 15 can be safely stored in the contaminated water storage tank 62. A detailed analysis of the radon concentration can be performed by reanalyzing the polluted water stored in the polluted water storage tank.

Hereinafter, an automatic radon concentration measurement and a real-time monitoring method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 5, the automatic radon concentration measurement and real-time monitoring method proposed by the present invention includes a water supply step (S100) of taking a sample from a water source and supplying it to the measurement chamber 15; When the sample is stored in the measurement chamber 15, the controller 47 of the control unit 9 transmits a signal to the measurement sensor 33 of the measurement chamber 15 to measure the gamma dose generated from the radium contained in the sample To the control unit (S110); (S120) of judging whether the polluted air is contaminated by estimating the concentration of radon by classifying / analyzing the transmitted data; A cleaning step (S130) of cleaning the measurement chamber by driving the cleaning water supply part in the contamination; And a storing step (S140) of storing the polluted water discharged from the measuring chamber (15).

In the automatic radon concentration measuring and real-time monitoring method proceeding to this step, in the water supplying step (S100), the water stored in the water source is supplied to the measuring unit (7) by the water supplying unit (5).

More specifically, first, the controller 47 of the control unit 9 opens a pipe L connected to the water source by transmitting a signal to the pump 13 and the first valve assembly V1.

A predetermined amount of sample is collected from the water source by the pump 13 and is supplied to the measurement chamber 15 through the pipe L. [

At this time, foreign substances contained in the sample may be filtered during the passage of the sample through the filtration unit 5. Therefore, foreign substances can be prevented from flowing into the measurement chamber 15 and stacked.

In addition, the sample can be injected into the measurement chamber 15 with the flow rate kept constant by passing through the flow rate controller 21 before being injected into the measurement chamber 15.

When the water supply step S100 is completed, the measuring step S110 for measuring the gamma ray of the radium proceeds.

When the sample is stored in the measurement chamber 15 and reaches a certain water level in the measurement step S110, the controller 47 transmits a signal to the measurement sensor 33 to measure the intensity of the gamma rays Is measured.

The radioactivity data including the audit line concentration of the sample thus measured is transmitted to the logger unit 39 of the control unit and analyzed.

That is, the logger unit 39 switches to the measurement mode and classifies / analyzes the radiation data measured by the measurement sensor 33 into the nuclear type.

For example, the logger unit 39 classifies / analyzes the transmitted radium radiation data into nuclear species to analyze the amount of radon, which is a daughter nuclear species. Namely, radium is an alkaline earth metal that releases α-, β-, and γ-rays, and alpha decays to radon, a radioactive gas. In this process, the radium, which is the mother nucleus, is converted into radon, which is a daughter nucleus, by emitting gamma rays. By analyzing this gamma dose, radon concentration can be deduced.

Therefore, the gamma dose data can be analyzed from the radium radiation data measured by the measurement sensor 33, and the concentration of radon can be estimated and analyzed by the gamma dose data.

Further, the logger unit 39 measures the environmental data around the measurement chamber 15 and sets the radiation baseline value (Background limit). At this time, it is preferable that the measurement of the radioactive basis value is made for iodine and cesium.

The data analysis result is transmitted to the controller 47. The controller 47 provides data to the storage unit 41 to store the data and determines whether the reference value is exceeded in the controller 47 itself.

That is, the storage unit 41 stores the data provided by the logger unit 39 by time or by day. At this time, the data storage format can be various formats, but is preferably stored in a text file format.

When the measurement step S110 is completed as described above, the step of determining whether the radioactivity is contaminated is performed (S120).

That is, in the determination step (S120), the controller 47 compares the reference value of radon with the actual radon concentration data of the measurement chamber 15 received from the logger unit 39 with each other.

As a result of the comparison, if it is determined that the actual radon concentration data exceeds the reference value, the controller 47 transmits a signal to the alarm unit 45.

The alarm unit 45 generates an alarm when a signal indicating that the reference value is exceeded is received. At this time, the alarm may be generated in various forms, such as an alarm sound through a speaker, a light emission through a warning light, and a warning message output on a monitor.

The administrator can recognize that the radon concentration of the sample has exceeded the standard value by such an alarm.

The data of the storage unit 41 and the controller 47 can be transmitted to the server S at the remote place by the transmission / reception unit 10 in a wire / wireless manner.

Therefore, it is possible to monitor the status of the site in real-time by receiving radioactivity data not only at the measurement site of the radon concentration but also at the remote site by the wired / wireless method.

On the other hand, when the radon concentration exceeds the reference value, it means that the measurement chamber 15 is contaminated, and therefore it is necessary to clean the measurement chamber 15 again.

Accordingly, a cleaning step (S130) for cleaning the contaminated measurement chamber proceeds. In this cleaning step S130, the controller 47 transmits a signal to the first valve assembly V1 to close it, thereby preventing the sample from being additionally supplied to the measurement chamber 15. [

In addition, the controller 47 sends a signal to the second valve assembly V2 to open water to supply the wash water to the metering chamber 15 to drain the contaminated radioactive material from the metering chamber 15.

By repeating this cleaning process, the inside of the measurement chamber 15 can be cleaned.

When the cleaning step S130 is completed, the storing step S140 for storing the discharged polluted water proceeds.

After the contaminated sample is discharged from the measurement chamber 15 in the storing step S140, the controller 47 closes the fourth valve assembly V4 and transmits a signal to the third valve assembly V3 The pipe L3 connected to the contaminated water storage tank 62 can be opened.

Therefore, the sample flowing out of the measurement chamber 15 is supplied to the contaminated water storage tank 62 and stored. Further, detailed analysis of the radionuclide can be performed by reanalyzing the polluted water stored in the polluted water storage tank 62.

As described above, when the measurement chamber 15 is contaminated, the control unit 9 transmits a signal to the first valve assembly V1 on the pipe connecting the water source and the water supply unit 5 to close the measurement chamber, And supplies the washing water to the measuring chamber 15 by opening a signal to the second valve assembly V2 on the piping connecting the measuring unit 9 and the washing water supplying unit 50, And transmits the signal to the third valve assembly V3 connected to the polluted water storage tank 61 to open the polluted water, thereby storing the polluted water.

As described above, a predetermined amount of the sample is collected from the water source and supplied to the measurement chamber 15, the concentration of the gamma ray generated from the radium contained in the sample is measured by the measurement sensor 33, The data are analyzed and the radon concentration is deduced to determine whether the reference value is exceeded.

In addition, since the radiation data is transmitted to the remote server S in a wired or wireless manner, it is possible to monitor the situation on the outside in real time.

1: Automatic measurement and monitoring system of radon concentration
5:
7:
9:
V1, V2, V3: First to third valve assemblies

Claims (8)

A water supply unit including a first valve assembly, which is a solenoid valve disposed on a pipe connected to the water source and opens / cut off the pipe, and a pump disposed on the pipe and pumping water from the water source;
A measuring unit for measuring a gamma ray generated from the radium contained in the water supplied by the water supply unit;
Water is sampled by transmitting a signal to the water supply unit and the measurement unit to drive the pump of the water supply unit and the radon concentration is measured by the gamma dose analyzing the measured radiation data of the measurement unit to determine whether or not the reference value is exceeded, A controller for supplying or blocking water to the measuring unit from the water supply unit according to the control signal; And
And a transmission / reception unit capable of transmitting / receiving data of the control unit to / from the server in a wired or wireless manner,
A washing water supply unit is additionally connected to one side of the measuring unit,
The washing water supply unit includes a washing water storage tank connected to an inlet of the measuring unit to store wash water; A pump for supplying wash water stored in the wash water storage tank to the measurement unit; And a second valve assembly disposed between the wash water storage tank and the metering section to control the flow of wash water,
Wherein the measuring unit comprises: a measurement chamber in which water is stored; A sample injection port provided at one side of the measurement chamber and supplied with water; A sample discharge port provided on the other side of the measurement chamber to discharge the measured sample; And a measurement sensor provided inside the measurement chamber for measuring the amount of gamma rays generated from radium contained in the sample while being locked and transmitting the measurement result to the control unit,
The water supply unit may further include a flow rate controller and a bypass pipe, and the flow rate controller may include a suction port connected to the pipe through which the sample is supplied; A first outlet for discharging the supplied sample to the measurement chamber; A second outlet for discharging the supplied sample to a bypass pipe; And an opening / closing plate hingedly provided inside the flow controller for selectively opening and closing the first and second outlets,
A polluted water storage tank disposed on the exit side of the metering unit and storing the water discharged after measuring the radioactivity of the metering unit;
And a third valve assembly disposed in the piping between the contaminated water storage tank and the metering unit for controlling the flow of the contaminated water according to the signal of the control unit. A measuring unit for measuring gamma rays generated from radium contained in the supplied water;
A water supply unit connecting the inlet of the measuring unit and the water source to supply the water stored in the water source to the measuring unit;
A washing water supply unit connected to an inlet side of the measuring unit and supplying washing water to the measuring unit;
Water is sampled by sending a signal to the water supply unit, the measurement unit, and the wash water supply unit to drive the pump of the water supply unit, and the measured radiation data of the measurement unit is analyzed to measure the radon concentration by the gamma dose. And a controller for selectively supplying or blocking the water supplied to the measuring unit from the water supply unit and the wash water supply unit according to the determination;
And a transmission / reception unit capable of transmitting / receiving data of the control unit to / from the server,
Wherein the water supply portion includes a first valve assembly capable of shutting off water flowing to the measurement portion,
Wherein the washing water supply portion includes a second valve assembly capable of blocking washing water flowing to the measuring portion,
The control unit selectively drives the first and second valve assemblies to shut off the first valve assembly when the data exceeds the reference value and to open the second valve assembly to allow the wash water to be supplied to the metering unit However,
Wherein the measuring unit comprises: a measurement chamber in which water is stored; A sample injection port provided at one side of the measurement chamber and supplied with water; A sample discharge port provided on the other side of the measurement chamber to discharge the measured sample; And a measurement sensor provided inside the measurement chamber for measuring the amount of gamma rays generated from radium contained in the sample while being locked and transmitting the measurement result to the control unit,
The water supply unit may further include a flow rate controller and a bypass pipe, and the flow rate controller may include a suction port connected to the pipe through which the sample is supplied; A first outlet for discharging the supplied sample to the measurement chamber; A second outlet for discharging the supplied sample to a bypass pipe; And an opening / closing plate hingedly provided inside the flow controller for selectively opening and closing the first and second outlets,
A polluted water storage tank disposed on the exit side of the metering unit and storing the water discharged after measuring the radioactivity of the metering unit;
And a third valve assembly disposed in the piping between the contaminated water storage tank and the metering unit for controlling the flow of the contaminated water according to the signal of the control unit. delete delete delete 3. The method according to claim 1 or 2,
The controller includes a logger unit for classifying / analyzing the gamma ray data of the radium transmitted from the measuring unit by the radioactivity analysis program into nuclear species to infer the concentration of radon;
A storage unit for storing data processed by the logger unit;
An alarm unit for generating an alarm when the radon concentration exceeds a reference value; And
And a controller for controlling the system by transmitting and receiving signals to and from the units, determining whether the data exceeds a reference value by a pollution degree determination program, and instructing storage of data.

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