CN111913206A - Movable airborne radioactivity online monitoring system and method - Google Patents
Movable airborne radioactivity online monitoring system and method Download PDFInfo
- Publication number
- CN111913206A CN111913206A CN202010707903.9A CN202010707903A CN111913206A CN 111913206 A CN111913206 A CN 111913206A CN 202010707903 A CN202010707903 A CN 202010707903A CN 111913206 A CN111913206 A CN 111913206A
- Authority
- CN
- China
- Prior art keywords
- shell
- air inlet
- air
- iodine
- air outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
A movable airborne radioactivity online monitoring system comprises a moving vehicle, an aerosol measuring unit, an iodine measuring unit, an inert gas measuring unit, an air extracting unit, a control unit, a computer unit and a battery unit, wherein the aerosol measuring unit is arranged on the right side of the upper part in the moving vehicle; by adopting the technical scheme, the invention has good effect: the movable air-borne radioactivity online monitoring system and method realize accurate measurement of radioactive aerosol, radioactive iodine and radioactive inert gas in the air through layered measurement of radioactive gas in the air at intervals, realize data summarization, analysis and storage, realize rapid movement of positions and provide powerful guarantee for production and life around nuclear facilities.
Description
Technical Field
The invention belongs to the technical field of nuclear radiation monitoring, and particularly relates to a movable airborne radioactivity online monitoring system and method.
Background
The large amount of radioactive airborne effluents generated during the production and decommissioning of nuclear facilities can pose potential threats to personnel and the ecological environment. The radioactive airborne effluents have various nuclides, the monitoring technology has great difficulty, and important parameters of nuclide activity monitoring and key nuclide identification analysis monitoring are single in function and mostly fixed monitoring equipment, so that the actual application requirements cannot be met; therefore, there is a need for a novel monitoring device and method to solve the problem that the existing gas monitoring device cannot meet the requirement of safe operation of facilities due to fixed monitoring places and single monitoring function.
Disclosure of Invention
The invention provides a movable airborne radioactivity online monitoring system and method, which are used for solving the problem that the existing gas monitoring equipment cannot meet the requirement of safe operation of facilities due to fixed monitoring place and single monitoring function.
The invention is realized by adopting the following technical scheme
A movable airborne radioactivity online monitoring system comprises a moving vehicle, an aerosol measuring unit, an iodine measuring unit, an inert gas measuring unit, an air extracting unit, a control unit, a computer unit and a battery unit, wherein the aerosol measuring unit is arranged on the right side of the upper part in the moving vehicle; the upper part of the moving vehicle is a rectangular closed box-shaped vehicle body, the right side of the upper part of the vehicle body is provided with an air inlet, the lower part of the left side of the vehicle body is provided with an air outlet, the lower part of the vehicle body is symmetrically provided with trundles, the middle of the inner side of the vehicle body is provided with a transverse clapboard, and the front part of the vehicle body is provided with a box door which is; the aerosol measurement unit consists of a shell A, a paper winding mechanism, a collection mechanism and a monitoring mechanism, wherein the paper winding mechanism is arranged on the inner side of the shell A, the collection mechanism is arranged on the left side of the middle part of the paper winding mechanism of the shell A, and the monitoring mechanism is arranged on the right side of the middle part of the paper winding mechanism of the shell A; the shell A is a rectangular shell, a guide sleeve is vertically arranged on the left side of the upper part of the shell A and communicated with the inside of the shell A, and a jackscrew is arranged on the excircle of the guide sleeve; the reel mechanism by the action wheel casing, from the driving wheel casing, middle shell, the initiative winding wheel, driving motor, driven winding wheel and filter paper constitute, the action wheel casing is the rectangle casing with from the driving wheel casing, the symmetry sets up in the shell, middle shell level sets up on the upper portion between from driving wheel casing and action wheel casing, the higher authority of middle shell is provided with measuring aperture and collecting hole with following correspondence, the initiative winding wheel sets up inside the action wheel casing, driving motor sets up the rear portion of initiative winding wheel in the action wheel casing, driving motor passes through the electric wire and is connected with the control unit, driven winding wheel sets up inside the driven casing, filter paper sets up in the stock form casing between initiative winding wheel and the driven winding wheel, the middle part of filter paper passes middle shell, filter paper is the aerosol adsorption film.
The collecting mechanism is composed of an air inlet pipe A, an air outlet pipe A and a pressing motor, the air inlet pipe A is vertically arranged at the upper part of the shell A, the upper end of the air inlet pipe A penetrates through an air inlet hole of the moving vehicle body to be communicated with the outside, the air outlet pipe A is vertically arranged in an air outlet hole at the lower part of the shell A, the pressing motor is arranged at the outer side of the air inlet pipe A at the lower part of the air inlet hole in the shell A, and the pressing motor is connected; the outer circle of the upper part of the air inlet pipe A is matched with a guide sleeve of the shell A for installation, a vertical key groove is formed in the left side of the outer circle of the upper part of the air inlet pipe A, the key groove is in sliding fit with a jackscrew end arranged on a guide pipe, external threads are formed in the middle of the outer circle of the air inlet pipe A, a conical gas collecting hood is arranged at the lower end of the air inlet pipe A, the lower end of the gas collecting hood corresponds to a material collecting hole in the upper part of the middle shell and is installed in a clearance fit; the air outlet pipe A and the air inlet pipe A are identical in structure and are arranged in a vertically symmetrical mode, and the upper end of the inverted cone-shaped gas collecting hood at the upper portion of the air outlet pipe A is correspondingly connected with the material collecting hole at the lower portion of the middle shell.
The monitoring mechanism is composed of a measuring module A and a measuring module B, the measuring module A is vertically and downwards arranged on the left side of the upper surface of the middle shell of the roll paper shell, the measuring module A is a PIPS detector and used for measuring alpha and beta nuclides, and a measuring head on the lower part of the measuring module A is matched with a measuring hole on the upper part of the middle shell; the measurement module B is vertically and upwards arranged on the left side below the middle shell of the paper rolling shell and corresponds to the measurement module A up and down, the measurement module B is a LaBr3 detector and is used for gamma nuclide measurement, a measurement head on the upper part of the measurement module B is matched with a measurement hole on the lower part of the middle shell, and a shielding lead plate is arranged on the outer side of the measurement module B; the measurement module A and the measurement module B are connected with the control unit through wires.
The iodine measuring unit consists of a shell B, an iodine lead chamber, a measuring module C, an air inlet cover, an air outlet cover and an iodine adsorption box, wherein the iodine lead chamber is arranged on the right side in the shell B, the measuring module C is arranged on the left side in the shell B, the air inlet cover is arranged on the upper part of the inner side of the iodine lead chamber, the air outlet cover is arranged on the lower part of the inner side of the iodine lead chamber, and the iodine adsorption box is arranged between the air inlet cover and the air outlet cover in the iodine lead chamber; the iodine lead chamber is a rectangular box body, a round measuring hole is formed in the left side of the iodine lead chamber, and an air inlet through hole is formed in the middle of the upper surface of the iodine lead chamber; the middle part of the lower surface of the iodine lead chamber is provided with an air outlet through hole, and the iodine lead chamber is made of a lead plate with a shielding function; the measuring module C is a Nal measuring module and is a measurer with an iodine nuclide identification function, the right outer circle of the measuring module C is matched with the left measuring hole of the iodine lead chamber, and the measuring module C is connected with the control unit through a wire; the air inlet cover is a conical shell which is communicated up and down, the upper end of the air inlet cover is an air inlet, the upper end of the air inlet cover is provided with an air inlet pipe B, the middle part of the air inlet pipe B penetrates through an air inlet through hole of the iodine-lead chamber and the shell B, the upper end of the excircle of the air inlet pipe B is provided with a connecting flange, and the upper end of the connecting flange is connected with a connecting flange of an air outlet pipe A at the lower; the air outlet cover is an inverted conical shell which is communicated up and down, the lower end of the air outlet cover is an air outlet, an air outlet pipe B is arranged at the lower end of the air outlet cover, the middle part of the air outlet pipe B penetrates through an air outlet through hole of the iodine lead chamber and the shell B, and a connecting flange is arranged at the lower end of the excircle of the air outlet pipe B; the iodine adsorption box is a cylindrical gaseous iodine adsorber, the upper part of the iodine adsorption box is in contact with the lower end of the air inlet cover, and the lower part of the iodine adsorption box is in contact with the upper end of the air outlet cover.
The inert gas measuring module is composed of a shell C, a measuring module D, an inert gas lead chamber, an air inlet pipe C and an air outlet pipe C, wherein the inert gas lead chamber is arranged in the middle of the inside of the shell C; the lead chamber of the inert gas is a cylindrical shell with an open upper part, the left side of the excircle of the lead chamber of the inert gas is provided with an air inlet, the right side of the excircle of the lead chamber of the inert gas is provided with an air outlet, and the lead chamber of the inert gas is made of lead; the measuring module D is a NaI detector for measuring radioactive inert gas, the excircle of the lower part of the measuring module D is hermetically connected with the upper part of the inner hole of the inert gas lead chamber, and the measuring module D is connected with the control unit through a data line; the left end of the air inlet pipe C is provided with a connecting flange, the connecting flange is connected with a connecting flange at the lower end of an air outlet pipe B of the iodine measuring unit, and the right end of the air inlet pipe C is connected with an air inlet hole of an inert gas lead chamber; the left end of the air outlet pipe C is connected with an air outlet hole of the inert gas lead chamber, the right end of the air outlet pipe C is provided with a connecting flange, and the connecting flange is connected with a connecting flange of an air outlet pipe B of the iodine measuring unit.
The middle of the air pumping unit is provided with a vacuum pump, an air inlet pipe D of the vacuum pump is provided with a flowmeter and a pressure gauge, an air outlet pipe D of the vacuum pump penetrates through an air outlet hole in the left side of the locomotive body to be communicated with the outside, and the vacuum pump is connected with the control unit through an electric wire.
The control unit is an electric control box internally provided with a PLC controller.
The computer unit is computer equipment for data analysis and storage, a display is arranged on the upper portion of the computer unit, and the computer unit is connected with the control unit through an electric wire.
A movable airborne radioactivity online monitoring method comprises the following steps:
a. the moving vehicle is pushed to a position where radioactive gas needs to be measured, the caster is fixed, and then the whole system starts to work by starting the control unit and the computer unit;
b. the control unit controls the air extraction unit to start working through a set program, the air extraction unit forms negative pressure in an air inlet pipe, external air enters through an air inlet pipe A of the aerosol measurement unit collection mechanism at the moment, radioactive aerosol in the air is filtered through filter paper of the paper winding mechanism, the filtered air flows out downwards from an air outlet pipe A at the lower part, the filter paper part passing through the radioactive aerosol moves to the right side under the driving of a driving motor at the rear part of the driving winding wheel and stops between a measurement module A and a measurement module B of the monitoring mechanism, the measurement module A and the measurement module B measure the radioactive aerosol on the filter paper, and measured data of alpha and beta nuclear gamma nuclides are transmitted to the control unit;
c. the air filtered and monitored by the aerosol measuring unit flows downwards from the air outlet pipe A at the lower part and then enters the iodine measuring unit, the air enters the air inlet cover through the air inlet pipe B, the radioactive iodine in the air is adsorbed in the iodine adsorption box, the air after the radioactive iodine is adsorbed flows out from the air outlet pipe through the air outlet cover at the lower part, the radioactive iodine in the iodine adsorption box is measured by the measuring module C, and the measured data is transmitted to the control unit;
d. the air adsorbed by the iodine of the iodine measuring unit flows downwards from the air outlet pipe B at the lower part and then enters the inert gas measuring unit and enters the lead chamber of the inert gas from the air inlet pipe C, the measuring module D measures the radioactive inert gas of the air in the lead chamber of the inert gas, and then the air is exhausted from the air outlet pipe C to the outer side of the body of the mobile vehicle from the air outlet pipe D of the air extracting unit through the air extracting unit;
e. monitoring the radioactive gas in the air according to the interval time set by the program of the control unit, and transmitting all measured data to a computer by the control unit for analysis and storage and displaying the data through a computer display;
f. the measurement of the radioactive gas in the air is completed.
By adopting the technical scheme, the invention has good effect: the movable air-borne radioactivity online monitoring system and method realize accurate measurement of radioactive aerosol, radioactive iodine and radioactive inert gas in the air through layered measurement of radioactive gas in the air at intervals, realize data summarization, analysis and storage, realize rapid movement of positions and provide powerful guarantee for production and life around nuclear facilities.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. an aerosol measuring unit, 2, an iodine measuring unit, 3, an inert gas measuring unit, 4, an air extracting unit, 5, a control unit, 6, a computer unit, 7, a battery unit, 8, a vehicle body, 1.1, a shell A, 1.2, a driving reel, 1.3, a measuring module B, 1.4, a measuring module A, 1.5, an air inlet pipe A, 1.6, a pressing motor, 1.7, filter paper, 1.8, a driven reel, 1.9, an air outlet pipe A, 2.1, an air inlet pipe B, 2.2, air inlet cover, 2.3, iodine adsorption box, 2.4, iodine lead chamber, 2.5, go out the gas hood, 2.6, outlet duct B, 2.7, measuring module C, 2.8, shell B, 3.1, inlet duct C, 3.2, measuring module D, 3.3, inert gas lead chamber, 3.4, outlet duct C, 3.5, shell C, 4.1, the vacuum pump, 4.2, the flowmeter, 4.3, the manometer, 4.4, inlet duct D, 4.5, outlet duct D, 8.1, the cross slab, 8.2, the truckle.
Detailed Description
The invention is described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the movable airborne radioactivity online monitoring system comprises a moving vehicle, an aerosol measuring unit 1, an iodine measuring unit 2, an inert gas measuring unit 3, an air extracting unit 4, a control unit 5, a computer unit 6 and a battery unit 7, wherein the upper part of the moving vehicle is a rectangular closed box-shaped vehicle body 8, the right side of the upper part of the vehicle body 8 is provided with an air inlet, the lower part of the left side is provided with an air outlet, the lower part of the vehicle body 8 is symmetrically provided with casters 8.2, the middle of the inner side of the vehicle body 8 is provided with a transverse partition plate 8.1, and the front part of the vehicle body 8 is provided with a box door; the aerosol measurement unit 1 is arranged on the right side of the upper part in the moving vehicle body 8, the aerosol measurement unit 1 is composed of a shell A1.1, a paper rolling mechanism, a collecting mechanism and a monitoring mechanism, the shell A1.1 is a rectangular shell, a guide sleeve is vertically arranged on the left side of the upper part of the shell A1.1 and communicated with the inside of the shell A1.1, and a jackscrew is arranged on the excircle of the guide sleeve; the paper winding mechanism is arranged on the inner side of the shell A1.1 and consists of a driving wheel shell, a driven wheel shell, a middle shell, a driving winding wheel 1.2, a driving motor, a driven winding wheel 1.5 and filter paper 1.7, the driving wheel shell and the driven wheel shell are rectangular shells, the aerosol adsorption device is characterized in that the aerosol adsorption device is symmetrically arranged on the left side and the right side of the inner lower part of the shell 1.1A, the middle shell is horizontally arranged on the upper part between the driven wheel shell and the driving wheel shell, the upper surface and the lower surface of the middle shell are correspondingly provided with a measuring hole and a material collecting hole, the driving winding wheel 1.2 is arranged in the driving wheel shell, the driving motor is arranged at the rear part of the driving winding wheel 1.2 in the driving wheel shell, the driving motor is connected with the control unit 5 through an electric wire, the driven winding wheel 1.8 is arranged in the driven shell, the filter paper 1.7 is arranged between the driving winding wheel 1.2 and the driven winding wheel 1.8 in the paper rolling shell, the middle part of the; the collecting mechanism is arranged on the left side of the middle of the paper rolling mechanism of the shell A1.1 and consists of an air inlet pipe A1.5, an air outlet pipe A1.9 and a pressing motor 1.6, the air inlet pipe A1.5 is vertically arranged on the upper portion of the shell A1.1, the upper end of the air inlet pipe A1.5 penetrates through an air inlet hole of a trolley body 8 to be communicated with the outside, the air outlet pipe A1.9 is vertically arranged in an air outlet hole in the lower portion of the shell A1.1, the pressing motor 1.6 is arranged on the outer side of the air inlet pipe A1.5 on the lower portion of the air inlet hole in the shell A1.1, and the pressing motor 1.; the outer circle of the upper part of the air inlet pipe A1.5 is matched and installed with the guide sleeve of the shell A1.1, a vertical key groove is formed in the left side of the outer circle of the upper part of the air inlet pipe A1.5, the key groove is in sliding fit with a jackscrew end arranged on the guide pipe, external threads are arranged in the middle of the outer circle of the air inlet pipe A1.5, a conical gas collecting hood is arranged at the lower end of the air inlet pipe A1.5, the lower end of the gas collecting hood corresponds to the material collecting hole in the upper part of the middle shell and is installed in a clearance fit mode; the air outlet pipe A1.9 and the air inlet pipe A1.5 have the same structure and are arranged up and down symmetrically, and the upper end of the inverted cone-shaped gas collecting hood at the upper part of the air outlet pipe A1.9 is correspondingly connected with the material collecting hole at the lower part of the middle shell; the monitoring mechanism is arranged on the right side of the middle part of the paper rolling mechanism of the shell A1.1; the monitoring mechanism consists of a measuring module A1.4 and a measuring module B1.3, wherein the measuring module A1.4 is vertically and downwards arranged on the left side of the upper surface of the middle shell of the roll paper shell, the measuring module A1.4 is a PIPS detector and is used for measuring alpha and beta nuclides, and a measuring head on the lower part of the measuring module A1.4 is matched with a measuring hole on the upper part of the middle shell; the measuring module B1.3 is vertically and upwards arranged on the left side below the middle shell of the paper rolling shell and corresponds to the measuring module A1.4 up and down, the measuring module B is a LaBr3 detector and is used for measuring gamma nuclide, a measuring head on the upper part of the measuring module B1.3 is matched with a measuring hole on the lower part of the middle shell, and a shielding lead plate is arranged on the outer side of the measuring module B1.3; the measuring module A1.4 and the measuring module B1.3 are connected with the control unit 5 through wires;
the iodine measuring unit 2 is arranged at the lower part of the aerosol measuring unit 1 in the mobile vehicle, the iodine measuring unit 2 is composed of a shell B2.8, an iodine lead chamber 2.4, a measuring module C2.7, an air inlet cover 2.2, an air outlet cover 2.5 and an iodine adsorption box 2.3, the iodine lead chamber 2.4 is arranged at the inner right side of the shell B2.8, the iodine lead chamber 2.4 is a rectangular box body, a round measuring hole is arranged at the left side of the iodine lead chamber 2.4, and an air inlet through hole is arranged in the middle of the upper surface of the iodine lead chamber 2.4; the middle part of the lower surface of the iodine lead chamber 2.4 is provided with an air outlet through hole, and the iodine lead chamber 2.4 is made of a lead plate with a shielding function; the measuring module C2.7 is arranged on the left side in the shell B2.8, the measuring module C2.7 is a Nal measuring module and is a measurer with an iodine nuclide identification function, the outer circle on the right side of the measuring module C2.7 is matched with a measuring hole on the left side of the iodine lead chamber 2.4, and the measuring module C2.7 is connected with the control unit 5 through a wire; the air inlet hood 2.2 is arranged at the upper part of the inner side of the iodine lead chamber 2.4, the air inlet hood 2.2 is a conical shell which is communicated up and down, the upper end of the air inlet hood 2.2 is an air inlet, an air inlet pipe B2.1 is arranged at the upper end of the air inlet hood 2.2, the middle part of the air inlet pipe B2.1 penetrates through an air inlet through hole of the iodine lead chamber 2.4 and the shell B, a connecting flange is arranged at the upper end of the excircle of the air inlet pipe B2.1, and the upper end of the connecting flange is connected with an air outlet pipe A1; the air outlet cover 2.5 is arranged at the lower part of the inner side of the iodine lead chamber 2.4, the air outlet cover 2.5 is an inverted conical shell which is communicated up and down, the lower end of the air outlet cover 2.5 is an air outlet, the lower end of the air outlet cover 2.5 is provided with an air outlet pipe B2.6, the middle part of the air outlet pipe B2.6 penetrates through an air outlet through hole of the iodine lead chamber 2.4 and the shell 2.8B, and the lower end of the excircle of the air outlet pipe B2.6 is provided with a; the iodine adsorption box 2.3 is arranged between the air inlet cover 2.2 and the air outlet cover 2.5 in the iodine lead chamber 2.4, the iodine adsorption box 2.3 is a cylindrical gaseous iodine adsorber, the upper part of the iodine adsorption box 2.3 is contacted with the lower end of the air inlet cover 2.2, and the lower part of the iodine adsorption box 2.3 is contacted with the upper end of the air outlet cover 2.5;
the inert gas measuring unit 3 is arranged on the left side of the iodine measuring unit 2 in the locomotive, the inert gas measuring module 3 is composed of a shell C3.5, a measuring module D3.2, an inert gas lead chamber 3.3, an air inlet pipe C3.1 and an air outlet pipe C3.4, the inert gas lead chamber 3.3 is arranged in the middle of the inner part of the shell C3.5, the inert gas lead chamber 3.3 is a cylindrical shell with an open upper part, the left side of the excircle of the inert gas lead chamber 3.3 is provided with an air inlet hole, the right side of the excircle of the inert gas lead chamber 3.3 is provided with an air outlet hole, and the inert gas lead chamber 3.3 is made of lead; the measuring module D3.2 is arranged at the upper part of the inert gas lead chamber 3.3, the measuring module D3.2 is a NaI detector for radioactive inert gas measurement, the excircle of the lower part of the measuring module D3.2 is hermetically connected with the upper part of the inner hole of the inert gas lead chamber 3.3, and the measuring module D3.2 is connected with the control unit 5 through a data line; the air inlet pipe C3.1 is horizontally arranged on the left side of the inert gas lead chamber 3.3 in the shell C3.5, the left end of the air inlet pipe C3.1 is provided with a connecting flange, the connecting flange is connected with a connecting flange at the lower end of an air outlet pipe B2.6 of the iodine measuring unit 2, and the right end of the air inlet pipe C3.1 is connected with an air inlet hole of the inert gas lead chamber 3.3; the gas outlet pipe C3.4 is horizontally arranged on the right side of the inert gas lead chamber 3.3 in the shell C3.5, the left end of the gas outlet pipe C3.4 is connected with a gas outlet hole of the inert gas lead chamber 3.3, the right end of the gas outlet pipe C3.4 is provided with a connecting flange, and the connecting flange is connected with a gas outlet pipe B2.6 connecting flange of the iodine measuring unit 2;
the device comprises an air exhaust unit 4, a vacuum pump 4.1, an air inlet pipe D4.4 of the vacuum pump 4.1, a flow meter 4.2 and a pressure gauge 4.3, wherein the air outlet pipe D4.5 of the vacuum pump 4.1 penetrates through an air outlet hole in the left side of a vehicle body 8 of the mobile vehicle to be communicated with the outside, and the vacuum pump 4.1 is connected with a control unit 5 through an electric wire; the control unit 5 is arranged on the left side of the aerosol measuring unit 1 in the locomotive, and the control unit 5 is an electric control box internally provided with a PLC (programmable logic controller); the battery unit 7 is arranged on the left side of the control unit 5 in the moving vehicle, and the computer unit 6 is arranged on the left side of the upper part of the moving vehicle; the computer unit 6 is a computer device for data analysis and storage, a display is arranged on the upper part of the computer unit 6, and the computer unit 6 is connected with the control unit 5 through a wire.
A movable airborne radioactivity online monitoring method comprises the following steps:
a. the mobile vehicle is pushed to the position where radioactive gas needs to be measured, the caster wheels 8.2 are fixed, and then the whole system starts to work by starting the control unit 5 and the computer unit 6;
b. the control unit 5 controls the air extraction unit 4 to start working through a set program, the air extraction unit 4 forms negative pressure at an air inlet pipe D4.4, at the moment, external air enters through an air inlet pipe A1.5 of a collection mechanism of the aerosol measurement unit 1, radioactive aerosol in the air inlet pipe is filtered and adsorbed through filter paper 1.7 of a paper winding mechanism, the filtered air flows downwards from a lower air outlet pipe A1.9, part of the filter paper 1.7 which is filtered and adsorbed with the radioactive aerosol moves to the right side to the middle of a measurement module A1.4 and a measurement module B1.3 of a monitoring mechanism under the driving of a driving motor at the rear part of the driving winding wheel 1.2 and stops, the measurement module A1.4 and the measurement module 1.3B measure the radioactive aerosol on the filter paper 1.7, and data of measured alpha and beta nuclear gamma nuclides are transmitted to the control unit 5;
c. the air filtered by the aerosol measuring unit 1 flows downwards from an air outlet pipe A1.9 at the lower part and then enters the iodine measuring unit 2, the air enters an air inlet cover 2.2 through an air inlet pipe B2.1, radioactive iodine in the air is adsorbed into an iodine adsorption box 2.3, the air which is adsorbed with the radioactive iodine flows out through an air outlet cover 2.5 at the lower part and then flows through an air outlet pipe B2.6, the radioactive iodine in the iodine adsorption box 2.3 is measured through a measuring module C2.7, and the measured data is transmitted to the control unit 5;
d. the air adsorbed by the radioactive iodine of the iodine measuring unit 2 flows downwards from a lower air outlet pipe B2.6 and then enters the inert gas measuring unit 3, and enters the inert gas lead chamber 3.3 from an air inlet pipe C3.1, the measuring module D3.2 measures the radioactive inert gas of the air in the inert gas lead chamber 3.3, and then the air enters the air pumping unit 4 from the air outlet pipe C3.4 through an air inlet pipe D4.4 and is discharged to the outer side of the body 8 of the mobile vehicle from an air outlet pipe D4.5 of the air pumping unit 4;
e. monitoring the radioactive gas in the air according to the interval time set by the program of the control unit 5, transmitting all measured data to the computer unit 6 by the control unit 5 for analysis and storage, and displaying the data through the display of the computer unit 6;
f. the measurement of the radioactive gas in the air is completed.
Main parameter test results
The present invention is not described in detail in the prior art.
Claims (9)
1. The utility model provides a movable airborne radioactivity on-line monitoring system, includes locomotive, aerosol measuring unit (1), iodine measuring unit (2), inert gas measuring unit (3), unit (4) of bleeding, the control unit (5), computer unit (6) and battery cell (7), characterized by: the aerosol measuring unit (1) is arranged on the right side of the upper part in the moving vehicle, the iodine measuring unit (2) is arranged on the lower part of the aerosol measuring unit (1) in the moving vehicle, the inert gas measuring unit (3) is arranged on the left side of the iodine measuring unit (2) in the moving vehicle, the air extracting unit (4) is arranged on the left side of the inert gas measuring unit (3) in the moving vehicle, the control unit (5) is arranged on the left side of the aerosol measuring unit (1) in the moving vehicle, the battery unit (7) is arranged on the left side of the control unit (5) in the moving vehicle, and the computer unit (6) is arranged on the left side of the upper part of the moving vehicle; the upper part of the moving vehicle is a rectangular closed box-shaped vehicle body (8), the right side of the upper part of the vehicle body (8) is provided with an air inlet, the lower part of the left side is provided with an air outlet, the lower part of the vehicle body (8) is symmetrically provided with trundles (8.2), the middle of the inner side of the vehicle body (8) is provided with a transverse clapboard (8.1), and the front part of the vehicle body (8) is provided with a split box door; the aerosol measurement unit (1) is composed of a shell A (1.1), a paper winding mechanism, a collection mechanism and a monitoring mechanism, wherein the paper winding mechanism is arranged on the inner side of the shell A (1.1), the collection mechanism is arranged on the left side of the middle of the paper winding mechanism of the shell A (1.1), and the monitoring mechanism is arranged on the right side of the middle of the paper winding mechanism of the shell A (1.1); the shell A (1.1) is a rectangular shell, a guide sleeve is vertically arranged on the left side of the upper part of the shell A (1.1) and communicated with the inside of the shell A (1.1), and a jackscrew is arranged on the excircle of the guide sleeve; the paper winding mechanism consists of a driving wheel shell, a driven wheel shell, a middle shell, a driving winding wheel (1.2), a driving motor, a driven winding wheel (1.8) and filter paper (1.7), wherein the driving wheel shell and the driven wheel shell are rectangular shells, the symmetry sets up in the shell, middle shell level sets up the upper portion between from driving wheel casing and action wheel casing, the higher authority of middle shell is provided with measuring aperture and collecting opening with following correspondence, initiative winding wheel (1.2) set up inside the action wheel casing, driving motor sets up the rear portion of initiative winding wheel (1.2) in the action wheel casing, driving motor passes through the electric wire and is connected with the control unit (5), driven winding wheel (1.8) set up inside the driven casing, filter paper (1.7) set up in the stock form shell between initiative winding wheel (1.2) and driven winding wheel (1.8), the middle part of filter paper (1.7) passes middle shell, filter paper (1.7) are the aerosol adsorption film.
2. The on-line monitoring system of claim 1, which is characterized in that: the collecting mechanism is composed of an air inlet pipe A (1.5), an air outlet pipe A (1.9) and a pressing motor (1.6), the air inlet pipe A (1.5) is vertically arranged at the upper part of the shell A (1.1), the upper end of the air inlet pipe A (1.5) penetrates through an air inlet hole of a trolley body (8) to be communicated with the outside, the air outlet pipe A (1.9) is vertically arranged in an air outlet hole at the lower part of the shell A (1.1), the pressing motor (1.6) is arranged at the outer side of the air inlet pipe A (1.5) at the lower part of the air inlet hole in the shell A (1.1), and the pressing motor (1.6) is connected with the control unit (5) through; the outer circle of the upper part of the air inlet pipe A (1.5) is matched and installed with a guide sleeve of the shell A (1.1), a vertical key groove is formed in the left side of the outer circle of the upper part of the air inlet pipe A (1.5), the key groove is in sliding fit with a jackscrew end arranged on the guide pipe, external threads are arranged in the middle of the outer circle of the air inlet pipe A (1.5), a conical gas collecting hood is arranged at the lower end of the air inlet pipe A (1.5), the lower end of the gas collecting hood corresponds to a material collecting hole in the upper part of the middle shell and is installed in a clearance fit mode, and a connecting flange is arranged; the structure of the air outlet pipe A (1.9) is the same as that of the air inlet pipe A (1.5), the air outlet pipe A and the air inlet pipe A are arranged in an up-down symmetrical mode, and the upper end of the inverted cone-shaped air collecting hood at the upper portion of the air outlet pipe A (1.9) is correspondingly connected with the material collecting hole at the lower portion of the middle shell.
3. The on-line monitoring system of claim 1, which is characterized in that: the monitoring mechanism is composed of a measuring module A (1.4) and a measuring module B (1.3), the measuring module A (1.4) is vertically arranged on the left side of the upper surface of the middle shell of the roll paper shell downwards, the measuring module A (1.4) is a PIPS detector and is used for measuring alpha and beta nuclides, and a measuring head on the lower part of the measuring module A (1.4) is matched with a measuring hole on the upper part of the middle shell; the measuring module B (1.3) is vertically and upwards arranged on the left side below the middle shell of the roll paper shell and corresponds to the measuring module A (1.4) up and down, the measuring module B (1.3) is a LaBr3 detector and is used for gamma nuclide measurement, a measuring head on the upper part of the measuring module B (1.3) is matched with a measuring hole on the lower part of the middle shell, and a shielding lead plate is arranged on the outer side of the measuring module B (1.3); the measuring module A (1.4) and the measuring module B (1.3) are connected with the control unit (5) through wires.
4. The on-line monitoring system of claim 1, which is characterized in that: the iodine measuring unit (2) is composed of a shell B (2.8), a lead iodide chamber (2.4), a measuring module C (2.7), an air inlet cover (2.2), an air outlet cover (2.5) and an iodine adsorption box (2.3), wherein the lead iodide chamber (2.4) is arranged on the right side in the shell B (2.8), the measuring module C (2.7) is arranged on the left side in the shell B (2.8), the air inlet cover (2.2) is arranged on the upper part of the inner side of the lead iodide chamber (2.4), the air outlet cover (2.5) is arranged on the lower part of the inner side of the lead iodide chamber (2.4), and the iodine adsorption box (2.3) is arranged between the air inlet cover (2.2) and the air outlet cover (2.5) in the lead iodide chamber (2.4); the iodine lead chamber (2.4) is a rectangular box body, a round measuring hole is formed in the left side of the iodine lead chamber (2.4), and an air inlet through hole is formed in the middle of the upper surface of the iodine lead chamber (2.4); the middle part of the lower surface of the iodine lead chamber (2.4) is provided with an air outlet through hole, and the iodine lead chamber (2.4) is made of a lead plate with a shielding function; the measuring module C (2.7) is a Nal measuring module and is a measurer with an iodine nuclide identification function, the right excircle of the measuring module C (2.7) is matched with a measuring hole in the left side of the iodine lead chamber (2.4) for installation, and the measuring module C (2.7) is connected with the control unit (5) through a wire; the air inlet cover (2.2) is a conical shell which is communicated up and down, the upper end of the air inlet cover (2.2) is an air inlet, an air inlet pipe B (2.1) is arranged at the upper end of the air inlet cover (2.2), the middle part of the air inlet pipe B (2.1) penetrates through an air inlet through hole of the iodine lead chamber (2.4) and the shell B (2.8), a connecting flange is arranged at the upper end of the excircle of the air inlet pipe B (2.1), and the upper end of the connecting flange is connected with a connecting flange of an air outlet pipe A (1.9) at the lower part of the aerosol measuring unit; the air outlet cover (2.5) is an inverted conical shell which is communicated up and down, the lower end of the air outlet cover (2.5) is an air outlet, an air outlet pipe B (2.6) is arranged at the lower end of the air outlet cover (2.5), the middle part of the air outlet pipe B (2.6) penetrates through an air outlet through hole of the iodine lead chamber (2.4) and the shell B (2.8), and the lower end of the excircle of the air outlet pipe B (2.6) is provided with a connecting flange; the iodine adsorption box (2.3) is a cylindrical gaseous iodine adsorber, the upper part of the iodine adsorption box (2.3) is contacted with the lower end of the air inlet cover (2.2), and the lower part of the iodine adsorption box (2.3) is contacted with the upper end of the air outlet cover (2.5).
5. The on-line monitoring system of claim 1, which is characterized in that: the inert gas measurement module is composed of a shell C (3.5), a measurement module D (3.2), an inert gas lead chamber (3.3), an air inlet pipe C (3.1) and an air outlet pipe C (3.4), wherein the inert gas lead chamber (3.3) is arranged in the middle of the inside of the shell C (3.5), the measurement module D (3.2) is arranged at the upper part of the inert gas lead chamber (3.3), the air inlet pipe C (3.1) is horizontally arranged at the left side of the inert gas lead chamber (3.3) in the shell C (3.5), and the air outlet pipe C (3.4) is horizontally arranged at the right side of the inert gas lead chamber (3.3) in the shell C (3.5); the inert gas lead chamber (3.3) is a cylindrical shell with an open upper part, the left side of the excircle of the inert gas lead chamber (3.3) is provided with a gas inlet, the right side of the excircle of the inert gas lead chamber (3.3) is provided with a gas outlet, and the inert gas lead chamber (3.3) is made of lead; the measuring module D (3.2) is a NaI detector for measuring radioactive inert gas, the excircle of the lower part of the measuring module D (3.2) is hermetically connected with the upper part of the inner hole of the inert gas lead chamber (3.3), and the measuring module D (3.2) is connected with the control unit (5) through a data line; the left end of the air inlet pipe C (3.1) is provided with a connecting flange, the connecting flange is connected with a connecting flange at the lower end of an air outlet pipe B (2.6) of the iodine measuring unit (2), and the right end of the air inlet pipe C (3.1) is connected with an air inlet hole of an inert gas lead chamber (3.3); the left end of the gas outlet pipe C (3.4) is connected with a gas outlet hole of the inert gas lead chamber (3.3), the right end of the gas outlet pipe C (3.4) is provided with a connecting flange, and the connecting flange is connected with a connecting flange of a gas outlet pipe B (2.6) of the iodine measuring unit (2).
6. The on-line monitoring system of claim 1, which is characterized in that: the middle of the air pumping unit (4) is provided with a vacuum pump (4.1), an air inlet pipe D (4.4) of the vacuum pump (4.1) is provided with a flowmeter (4.2) and a pressure gauge (4.3), an air outlet pipe D (4.5) of the vacuum pump (4.1) penetrates through an air outlet hole in the left side of the trolley body (8) to be communicated with the outside, and the vacuum pump (4.1) is connected with the control unit (5) through an electric wire.
7. The on-line monitoring system of claim 1, which is characterized in that: the control unit (5) is an electric control box internally provided with a PLC controller.
8. The on-line monitoring system of claim 1, which is characterized in that: the computer unit (6) is computer equipment for data analysis and storage, a display is arranged on the upper portion of the computer unit (6), and the computer unit (6) is connected with the control unit (5) through an electric wire.
9. A movable airborne radioactivity on-line monitoring method is characterized by comprising the following steps:
a. the mobile vehicle is pushed to a position where radioactive gas needs to be measured, the caster wheels (8.2) are fixed, and then the whole system starts to work by starting the control unit (5) and the computer unit (6);
b. the control unit (5) controls the air extraction unit (4) to start working through a set program, the air extraction unit (4) forms negative pressure in an air inlet pipe, external air enters through the air inlet pipe A (1.5) of the aerosol measurement unit (1) collection mechanism, radioactive aerosol in the air inlet pipe is filtered through filter paper (1.7) of the paper winding mechanism, the filtered air flows downwards from a lower air outlet pipe A (1.9), the filter paper (1.7) part passing through the radioactive aerosol is driven by a driving motor at the rear part of the driving winding wheel (1.2) to move to the right side to the middle of a measurement module A (1.4) and a measurement module B (1.3) of the monitoring mechanism to stop, the measurement module A (1.4) and the measurement module B (1.3) measure the radioactive aerosol on the filter paper (1.7), and data of measured alpha, beta nuclear and gamma nuclides are transmitted to the control unit (5);
c. the air filtered and monitored by the aerosol measuring unit (1) flows downwards from an air outlet pipe A (1.9) at the lower part and then enters an iodine measuring unit (2), the air enters an air inlet cover (2.2) through an air inlet pipe B (2.1), radioactive iodine in the air is adsorbed into an iodine adsorption box (2.3), the air which is adsorbed with the radioactive iodine flows out from an air outlet cover (2.5) at the lower part through an air outlet pipe, the radioactive iodine in the iodine adsorption box (2.3) is measured through a measuring module C (2.7), and the measured data is transmitted to a control unit (5);
d. air adsorbed by iodine of the iodine measuring unit (2) flows downwards from a lower air outlet pipe B (2.6) and then enters the inert gas measuring unit (3), enters the inert gas lead chamber (3.3) from an air inlet pipe C (3.1), the measuring module D (3.2) measures radioactive inert gas in the inert gas lead chamber (3.3), and then the air is exhausted from the air outlet pipe C (3.4) to the outer side of the body (8) of the mobile vehicle from an air outlet pipe D (4.5) of the air pumping unit (4) through the air pumping unit (4) from the air outlet pipe C (3.4);
e. monitoring the radioactive gas in the air according to the interval time set by the program of the control unit (5), and transmitting all measured data to a computer by the control unit (5) for analysis and storage and displaying by a computer display;
f. the measurement of the radioactive gas in the air is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707903.9A CN111913206A (en) | 2020-07-22 | 2020-07-22 | Movable airborne radioactivity online monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707903.9A CN111913206A (en) | 2020-07-22 | 2020-07-22 | Movable airborne radioactivity online monitoring system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111913206A true CN111913206A (en) | 2020-11-10 |
Family
ID=73280622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010707903.9A Pending CN111913206A (en) | 2020-07-22 | 2020-07-22 | Movable airborne radioactivity online monitoring system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111913206A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731510A (en) * | 2020-12-22 | 2021-04-30 | 西安中核核仪器有限公司 | Mobile radioactive iodine monitoring method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543462A (en) * | 2013-10-17 | 2014-01-29 | 中国人民解放军海军工程大学 | Nuclide recognition device of radioactive aerosol |
| CN104166154A (en) * | 2014-06-26 | 2014-11-26 | 中国核电工程有限公司 | PIG sampling and monitoring system and method |
| CN104216002A (en) * | 2014-09-03 | 2014-12-17 | 北京市射线应用研究中心 | Alpha, beta and gamma radioactive aerosol continuous sampling and measuring device |
| CN104215997A (en) * | 2014-09-03 | 2014-12-17 | 北京市射线应用研究中心 | Alpha and gamma dual-channel energy spectrum continuous monitoring method and alpha and gamma dual-channel energy spectrum continuous monitoring system |
| CN104360371A (en) * | 2014-11-12 | 2015-02-18 | 中国人民解放军63653部队 | High-sensitivity radioactive aerosol continuous monitor |
| CN104570040A (en) * | 2015-01-21 | 2015-04-29 | 中国科学院上海应用物理研究所 | On-line monitoring system and method for radioactive gas and radioactive aerosol |
| US20160118149A1 (en) * | 2013-04-25 | 2016-04-28 | Areva Gmbh | Emission monitoring system for a venting system of a nuclear power plant and nuclear power plant having the emission monitoring system |
| CN106291655A (en) * | 2016-08-23 | 2017-01-04 | 中国船舶重工集团公司第七〇九研究所 | A kind of airborne radioactivity monitor |
| CN210038175U (en) * | 2019-03-29 | 2020-02-07 | 中广核工程有限公司 | Detector for measuring activity of radioactive inert gas |
-
2020
- 2020-07-22 CN CN202010707903.9A patent/CN111913206A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160118149A1 (en) * | 2013-04-25 | 2016-04-28 | Areva Gmbh | Emission monitoring system for a venting system of a nuclear power plant and nuclear power plant having the emission monitoring system |
| CN103543462A (en) * | 2013-10-17 | 2014-01-29 | 中国人民解放军海军工程大学 | Nuclide recognition device of radioactive aerosol |
| CN104166154A (en) * | 2014-06-26 | 2014-11-26 | 中国核电工程有限公司 | PIG sampling and monitoring system and method |
| CN104216002A (en) * | 2014-09-03 | 2014-12-17 | 北京市射线应用研究中心 | Alpha, beta and gamma radioactive aerosol continuous sampling and measuring device |
| CN104215997A (en) * | 2014-09-03 | 2014-12-17 | 北京市射线应用研究中心 | Alpha and gamma dual-channel energy spectrum continuous monitoring method and alpha and gamma dual-channel energy spectrum continuous monitoring system |
| CN104360371A (en) * | 2014-11-12 | 2015-02-18 | 中国人民解放军63653部队 | High-sensitivity radioactive aerosol continuous monitor |
| CN104570040A (en) * | 2015-01-21 | 2015-04-29 | 中国科学院上海应用物理研究所 | On-line monitoring system and method for radioactive gas and radioactive aerosol |
| CN106291655A (en) * | 2016-08-23 | 2017-01-04 | 中国船舶重工集团公司第七〇九研究所 | A kind of airborne radioactivity monitor |
| CN210038175U (en) * | 2019-03-29 | 2020-02-07 | 中广核工程有限公司 | Detector for measuring activity of radioactive inert gas |
Non-Patent Citations (1)
| Title |
|---|
| 张志龙等: "PING-50型放射性气溶胶、碘和惰性气体监测系统的研制", 《核电子学与探测技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731510A (en) * | 2020-12-22 | 2021-04-30 | 西安中核核仪器有限公司 | Mobile radioactive iodine monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206920288U (en) | A kind of device for automatically determining binary channels particulate matter quality concentration | |
| CN106291655B (en) | Airborne radioactivity monitor | |
| CN104360371A (en) | High-sensitivity radioactive aerosol continuous monitor | |
| CN112162309A (en) | Cabinet type air-borne radioactive integrated monitoring device | |
| CN104865591B (en) | Integrated type radiation environment auto monitoring and measurement station | |
| CN104166154A (en) | PIG sampling and monitoring system and method | |
| CN202285037U (en) | 10kv insulator artificial contamination laboratory based on ultraviolet imagery | |
| CN103928068A (en) | System and method for quantitatively measuring pressurized water reactor nuclear power plant circuit coolant leakage rate | |
| CN107316664B (en) | Nuclear Plant breakage on-line measuring device and method | |
| CN111913206A (en) | Movable airborne radioactivity online monitoring system and method | |
| CN103616712B (en) | The measuring method of the detection efficiency of Airborne Radioiodine surveying instrument | |
| CN103267798B (en) | Measuring device and measuring method of high-concentration tritium in gas | |
| CN203616482U (en) | Measuring system for detection efficiency of airbone radioactive iodine measuring instrument | |
| JP5095596B2 (en) | Particulate matter collection device and particulate matter measurement device | |
| CN104865398A (en) | Full-automatic monitoring instrument for radioactive aerosol | |
| CN109520682A (en) | A kind of on-line monitoring system and method applied to air leakage rate of sintering machine | |
| CN203324247U (en) | Automatic monitoring system of radioactive aerosol | |
| Bowyer et al. | Automated particulate sampler for Comprehensive Test Ban Treaty verification (the DOE radionuclide aerosol sampler/analyzer) | |
| CN107807136B (en) | Measuring accuracy calibration device of radioactive aerosol monitor and working method thereof | |
| CN203241541U (en) | Device for measuring high-concentration tritium in gas | |
| CN116466386A (en) | Plug-in card type radioactive aerosol monitor | |
| CN201319001Y (en) | Radioactive iodine sampling device | |
| CN207883331U (en) | A kind of fuel for nuclear power plant cladding integrity detection sobs suction cabinet online | |
| CN211717897U (en) | Radioactive gas sampling device based on big data analysis | |
| CN113921152A (en) | Containment pressure relief and exhaust activity monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |