Radioactive airborne effluent combined sampling device

Abstract

The utility model belongs to the technical field of airborne radioactive effluent sampling and monitoring, and particularly relates to a radioactive airborne effluent combined sampling device which comprises two aerosol and iodine sampling pipelines, a three-way valve, an air pump, a tritium sampling pipeline, a carbon-14 sampling pipeline, an inert gas sampling pipeline, a quick connector L and a quick connector K, the three-way valve is respectively connected with a quick connector K and one ends of two aerosol and iodine sampling pipelines, the quick connector K is connected with a chimney, and chimney gas enters the device from the quick connector K; the other ends of the two aerosol and iodine sampling pipelines are respectively and sequentially connected with a sucking pump and a check valve through pipelines; the check valve pipelines are respectively connected with one ends of a tritium sampling pipeline, a carbon-14 sampling pipeline and an inert gas sampling pipeline, the other ends of the tritium sampling pipeline, the carbon-14 sampling pipeline and the inert gas sampling pipeline are respectively connected with a quick connector L through pipelines, the quick connector L is connected with a chimney, and chimney gas returns to the chimney through the quick connector L. The sampling device is reasonable in design, compact in structure, convenient to maintain and capable of completely meeting sampling and monitoring requirements of airborne radioactive effluents of nuclear power plants and other facilities, and modular installation is adopted.

Description

Technical Field

[0001] This utility model belongs to the field of sampling and monitoring technology of airborne radioactive effluents, and specifically relates to a combined sampling device for radioactive airborne effluents. Background Technology

[0002] According to the "Regulations on Environmental Radiation Protection of Nuclear Power Plants," the monitoring items for airborne radioactive effluents should include inert gases, iodine, particles (half-life ≥ 8 days), carbon-14, and total tritium. To meet these requirements, domestic nuclear power plants commonly use three separate sampling devices for tritium, carbon-14, inert gases, iodine, and particles (half-life ≥ 8 days) in their chimney airborne radioactive effluents. These devices are for tritium, carbon-14, inert gases, iodine, and particles.

[0003] In existing technologies, using three independent sampling methods has drawbacks such as high initial investment, large factory space requirements, complex equipment, and heavy operation and maintenance workload. Therefore, this patent designs a single device to achieve joint sampling of gaseous effluent tritium, carbon-14, inert gases, iodine, and particles, thereby solving the aforementioned problems. Utility Model Content

[0004] This invention proposes a combined sampling device for radioactive gaseous effluents, which addresses the shortcomings of existing technologies where three sampling devices are set up independently, resulting in high initial investment, large factory space requirements, complex equipment, and heavy workload for operation and maintenance.

[0005] The technical solution of this utility model:

[0006] This invention proposes a combined sampling device for radioactive gaseous effluents. The device includes two aerosol and iodine sampling lines, a three-way valve, a vacuum pump, a tritium sampling line, a carbon-14 sampling line, an inert gas sampling line, a quick connector L, and a quick connector K. The three-way valve is connected to quick connector K and one end of the two aerosol and iodine sampling lines, respectively. Quick connector K is connected to a chimney, and the chimney gas enters the device through quick connector K. The other ends of the two aerosol and iodine sampling lines are connected to the vacuum pump and a check valve in sequence through pipes, respectively. The check valve pipes are connected to one end of the tritium sampling line, the carbon-14 sampling line, and the inert gas sampling line, respectively. The other ends of the tritium sampling line, the carbon-14 sampling line, and the inert gas sampling line are connected to quick connector L through pipes, and quick connector L is connected to the chimney. The chimney gas returns to the chimney through quick connector L.

[0007] In some embodiments, a mass flow meter C and a regulating valve C are provided on the air pump and the pipeline between the aerosol and iodine sampling lines. The regulating valve C is connected to the air pump through the pipeline, and the mass flow meter C is connected to the regulating valve C through the pipeline.

[0008] In some embodiments, an electric contact pressure gauge is provided on the pipeline between the regulating valve C and the air pump, and the electric contact pressure gauge is used to protect the air pump from tripping.

[0009] In some embodiments, a one-way throttle valve A is provided between the quick connector K and the chimney, and a one-way throttle valve B is provided between the quick connector L and the chimney.

[0010] In some embodiments, the two aerosol and iodine sampling lines specifically include aerosol and iodine sampling line A and aerosol and iodine sampling line B. The two aerosol and iodine sampling lines each include two quick connectors, an aerosol and iodine sampler, a mass flow meter, and a regulating valve. The three-way valve is connected in sequence through a pipeline to quick connector A, aerosol and iodine sampler A, quick connector C, mass flow meter A, and regulating valve A of aerosol and iodine sampling line A. The regulating valve A is connected to mass flow meter C through a pipeline.

[0011] In some embodiments, the three-way valve is connected in sequence via a pipe to the quick connector B of the aerosol and iodine sampling line B, the aerosol and iodine sampler B, the quick connector D, the mass flow meter B, and the regulating valve B. The regulating valve B is connected to the mass flow meter C via a pipe.

[0012] In some embodiments, the tritium sampling pipeline specifically includes a quick connector G, a tritium sampler, a quick connector E, a mass flow meter D, and a regulating valve D. The quick connector L is connected in sequence to the quick connector G, the tritium sampler, the quick connector E, the mass flow meter D, and the regulating valve D via a pipeline. The regulating valve D is connected to a check valve via a pipeline.

[0013] In some embodiments, the carbon-14 sampling pipeline specifically includes a quick connector H, a carbon-14 sampler, a quick connector F, a mass flow meter F, and a regulating valve E. The quick connector L is connected in sequence to the quick connector H, the carbon-14 sampler, the quick connector F, the mass flow meter E, and the regulating valve E through a pipeline. The regulating valve E is connected to a check valve through a pipeline.

[0014] In some embodiments, the inert gas sampling pipeline specifically includes a quick connector J, an inert gas sampler, a quick connector I, a mass flow meter G, and a regulating valve F. The quick connector L is connected in sequence to the quick connector J, the inert gas sampler, the quick connector I, the mass flow meter G, and the regulating valve F via a pipeline. The regulating valve F is connected to a check valve via a pipeline.

[0015] In some embodiments, the device is further provided with a field control unit, which is connected via a network cable to a regulating valve, a mass flow meter, an electrical contact pressure gauge, an aerosol and iodine sampler, a tritium sampler, a carbon-14 sampler, and an inert gas sampler. The field control unit controls the device to perform joint sampling of airborne effluent tritium, carbon-14, inert gas, iodine, and particles.

[0016] The beneficial effects of this utility model are:

[0017] This invention proposes a combined sampling device for radioactive gaseous effluents. By setting up aerosol and iodine sampling pipelines, tritium sampling pipelines, carbon-14 sampling pipelines, and inert gas sampling pipelines, this device realizes the combined sampling and remote control functions of gaseous effluents tritium, carbon-14, inert gas, iodine, and particles. The sampling device is reasonably designed, compact in structure, modularly installed, and easy to maintain, fully meeting the sampling and monitoring requirements of gaseous radioactive effluents in nuclear power plants and other facilities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a combined sampling device for radioactive gaseous effluent designed for this utility model. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, this utility model proposes a combined sampling device for radioactive gaseous effluents. The device comprises a one-way throttle valve A (V1 in the figure), a quick connector K (QC11 in the figure), a three-way valve (VT in the figure), two aerosol and iodine sampling pipelines, a mass flow meter C (FM in the figure), a regulating valve C (AV3 in the figure), a vacuum pump (PUMP in the figure), a check valve (CV in the figure), a tritium sampling pipeline, a carbon-14 sampling pipeline, an inert gas sampling pipeline, an electrical contact pressure gauge (PS in the figure), a quick connector L (QC12 in the figure), a one-way throttle valve B (V2 in the figure), and a field control unit.

[0021] The chimney gas enters the device through a one-way throttle valve A. One-way throttle valve A is connected in sequence to quick connector K and a three-way valve via piping. The three-way valve is connected to quick connector K and two aerosol and iodine sampling lines. The two aerosol and iodine sampling lines are each connected to a mass flow meter C via piping. Mass flow meter C is connected in sequence to regulating valve C, a suction pump, and a check valve via piping. An electric contact pressure gauge is installed on the piping between regulating valve C and the suction pump to provide pump trip protection. The check valve is connected to one end of a tritium sampling line, a carbon-14 sampling line, and an inert gas sampling line via piping. The other ends of these lines are connected to quick connector L via piping. Quick connector L is connected to a one-way throttle valve B via piping. The chimney gas returns to the chimney from the one-way throttle valve B.

[0022] The two aerosol and iodine sampling lines specifically include aerosol and iodine sampling line A and aerosol and iodine sampling line B. Aerosol and iodine sampling line A specifically includes quick connector A (QC1 in the figure), aerosol and iodine sampler A (PIS1 in the figure), quick connector C (QC3 in the figure), mass flow meter A (FM in the figure), and regulating valve A (AV1 in the figure). The three-way valve is connected to quick connector A, aerosol and iodine sampler A, quick connector C, mass flow meter A, and regulating valve A in sequence through pipelines. Regulating valve A is connected to mass flow meter C through pipelines. The aerosol and iodine sampling line B includes quick connector B (QC2 in the figure), aerosol and iodine sampler B (PIS2 in the figure), quick connector B (QC4 in the figure), mass flow meter B (FM in the figure), and regulating valve B (AV2 in the figure). The three-way valve is connected in sequence to quick connector B, aerosol and iodine sampler B, quick connector D, mass flow meter B, and regulating valve B through a pipeline. Regulating valve B is connected to mass flow meter C through a pipeline.

[0023] The tritium sampling pipeline specifically includes quick connector G (QC7 in the figure), tritium sampler, quick connector E (QC5 in the figure), mass flow meter D, and regulating valve D (AV4 in the figure). Quick connector L is connected to quick connector G, tritium sampler, quick connector E, mass flow meter D, and regulating valve D in sequence through a pipeline. Regulating valve D is connected to check valve through a pipeline.

[0024] The carbon-14 sampling pipeline specifically includes quick connector H (QC8 in the figure), carbon-14 sampler, quick connector F (QC6 in the figure), mass flow meter E, and regulating valve E (AV5 in the figure). Quick connector L is connected to quick connector H, carbon-14 sampler, quick connector F, mass flow meter E, and regulating valve E in sequence through a pipeline. Regulating valve E is connected to check valve through a pipeline.

[0025] The inert gas sampling pipeline specifically includes quick connector J (QC10 in the figure), inert gas sampler, quick connector I (QC9 in the figure), mass flow meter F, and regulating valve F (AV6 in the figure). Quick connector L is connected to quick connector J, inert gas sampler, quick connector I, mass flow meter F, and regulating valve F in sequence through a pipeline. Regulating valve F is connected to check valve through a pipeline.

[0026] The regulating valve, mass flow meter, electrical contact pressure gauge, aerosol and iodine sampler, tritium sampler, carbon-14 sampler, and inert gas sampler are equipped with RJ45 network ports. These devices are connected to the field control unit via network cables. The field control unit's dedicated software enables remote control of the sampling devices and parameter calling, including real-time reading of information such as device start / stop, sampling volume, and sampling flow rate. This achieves the combined sampling and remote control of gaseous effluents tritium, carbon-14, inert gases, iodine, and particles.

[0027] This invention proposes a combined sampling device for radioactive gaseous effluents. This device enables the combined sampling and remote control of gaseous effluents, including tritium, carbon-14, inert gases, iodine, and particles. The sampling device is reasonably designed, compact in structure, modularly installed, and easy to maintain, fully meeting the sampling and monitoring requirements for gaseous radioactive effluents in nuclear power plants and other facilities.

[0028] The device has been validated through sampling from the chimney of a heavy water reactor nuclear power plant, demonstrating high sampling accuracy and reliability. It is suitable for combined sampling and monitoring of tritium, carbon-14, inert gases, iodine, and particles in gaseous effluents from all nuclear power plants or facilities. This is a pioneering achievement both domestically and internationally, and possesses significant potential for widespread application.

[0029] The embodiments of this utility model have been described in detail above. This utility model is not limited to the above examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model.

Claims

1. A combined sampling device for radioactive gaseous effluents, characterized in that, The device includes two aerosol and iodine sampling lines, a three-way valve, a vacuum pump, a tritium sampling line, a carbon-14 sampling line, an inert gas sampling line, a quick connector L, and a quick connector K. The three-way valve is connected to quick connector K and one end of the two aerosol and iodine sampling lines, respectively. Quick connector K is connected to a chimney, and the chimney gas enters the device through quick connector K. The other ends of the two aerosol and iodine sampling lines are connected to the vacuum pump and a check valve in sequence through pipes, respectively. The check valve pipes are connected to one end of the tritium sampling line, the carbon-14 sampling line, and the inert gas sampling line, respectively. The other ends of the tritium sampling line, the carbon-14 sampling line, and the inert gas sampling line are connected to quick connector L through pipes, and quick connector L is connected to the chimney, and the chimney gas returns to the chimney through quick connector L.

2. The combined sampling device for radioactive gaseous effluents according to claim 1, characterized in that, The air pump and the pipeline between the aerosol and iodine sampling lines are equipped with a mass flow meter C and a regulating valve C. The regulating valve C is connected to the air pump through a pipeline, and the mass flow meter C is connected to the regulating valve C through a pipeline.

3. The combined sampling device for radioactive gaseous effluents according to claim 2, characterized in that, An electric contact pressure gauge is installed on the pipeline between the regulating valve C and the air pump. The electric contact pressure gauge is used to protect the air pump from tripping.

4. The combined sampling device for radioactive gaseous effluents according to claim 3, characterized in that, A one-way throttle valve A is provided between the quick connector K and the chimney, and a one-way throttle valve B is provided between the quick connector L and the chimney.

5. The combined sampling device for radioactive gaseous effluents according to claim 4, characterized in that, The two aerosol and iodine sampling lines specifically include aerosol and iodine sampling line A and aerosol and iodine sampling line B. Each of the two aerosol and iodine sampling lines includes a quick connector, an aerosol and iodine sampler, a mass flow meter, and a regulating valve. The three-way valve is connected in sequence through a pipeline to quick connector A, aerosol and iodine sampler A, quick connector C, mass flow meter A, and regulating valve A of aerosol and iodine sampling line A. The regulating valve A is connected to the mass flow meter C through a pipeline.

6. The combined sampling device for radioactive gaseous effluents according to claim 5, characterized in that, The three-way valve is connected in sequence via a pipe to the quick connector B of the aerosol and iodine sampling pipeline B, the aerosol and iodine sampler B, the quick connector D, the mass flow meter B, and the regulating valve B. The regulating valve B is connected to the mass flow meter C via a pipe.

7. The combined sampling device for radioactive gaseous effluents according to claim 1, characterized in that, The tritium sampling pipeline specifically includes a quick connector G, a tritium sampler, a quick connector E, a mass flow meter D, and a regulating valve D. The quick connector L is connected in sequence to the quick connector G, the tritium sampler, the quick connector E, the mass flow meter D, and the regulating valve D via a pipeline. The regulating valve D is connected to a check valve via a pipeline.

8. The combined sampling device for radioactive gaseous effluents according to claim 1, characterized in that, The carbon-14 sampling pipeline specifically includes a quick connector H, a carbon-14 sampler, a quick connector F, a mass flow meter E, and a regulating valve E. The quick connector L is connected in sequence to the quick connector H, the carbon-14 sampler, the quick connector F, the mass flow meter E, and the regulating valve E via a pipeline. The regulating valve E is connected to a check valve via a pipeline.

9. The combined sampling device for radioactive gaseous effluents according to claim 1, characterized in that, The inert gas sampling pipeline specifically includes a quick connector J, an inert gas sampler, a quick connector I, a mass flow meter F, and a regulating valve F. The quick connector L is connected in sequence to the quick connector J, the inert gas sampler, the quick connector I, the mass flow meter F, and the regulating valve F via a pipeline. The regulating valve F is connected to a check valve via a pipeline.

10. A combined sampling device for radioactive gaseous effluents according to claim 1, characterized in that, The device is also equipped with a field control unit, which is connected to a regulating valve, a mass flow meter, an electrical contact pressure gauge, an aerosol and iodine sampler, a tritium sampler, a carbon-14 sampler, and an inert gas sampler via a network cable. The field control unit controls the device to perform joint sampling of gaseous effluent tritium, carbon-14, inert gas, iodine, and particles.

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