CN-224231380-U - Radioactive gas carrying effluent combined sampling device

CN224231380UCN 224231380 UCN224231380 UCN 224231380UCN-224231380-U

Abstract

The utility model belongs to the technical field of gas-borne radioactive effluent sampling and monitoring, and particularly relates to a radioactive gas-borne radioactive 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, wherein the three-way valve is respectively connected with the quick connector K and one ends of the 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 connected with an air pump and a check valve in sequence 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 has reasonable design and compact structure, adopts modularized installation, is convenient to maintain, and completely meets the sampling and monitoring requirements of the air-borne radioactive effluents of nuclear power plants and other facilities.

Inventors

CHEN YAMIN
LIU PENG
ZOU YING
SUN YINGYING
QIN JIANHUA
HAN YUGANG
WANG HUIBO
NIU PENG
Yue Tonghao
XIA WEI
WANG JIYUAN
WANG YUKUN

Assignees

中核核电运行管理有限公司

Dates

Publication Date: 20260512
Application Date: 20250519

Claims (10)

1. The radioactive gas carrying effluent combined sampling device is characterized by comprising 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, wherein the three-way valve is respectively connected with the quick connector K and one ends of the two aerosol and iodine sampling pipelines, the quick connector K is connected with a chimney, chimney gas enters the device from the quick connector K, the other ends of the two aerosol and iodine sampling pipelines are respectively connected with the air pump and a check valve through pipelines in sequence, the check valve pipelines are respectively connected with one ends of the tritium sampling pipeline, the carbon-14 sampling pipeline and the 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 the quick connector L through pipelines, the quick connector L is connected with the chimney, and the chimney gas returns to the chimney through the quick connector L.
2. The radioactive air-carrying effluent combined sampling device according to claim 1, wherein a mass flowmeter C and a regulating valve C are arranged on the air pump and a pipeline between the air pump and the aerosol and iodine sampling pipe, the regulating valve C is connected with the air pump through a pipeline, and the mass flowmeter C is connected with the regulating valve C through a pipeline.
3. The radioactive air-carrying effluent combined sampling device according to claim 2, wherein an electric contact pressure gauge is arranged on a pipeline between the regulating valve C and the air pump, and the electric contact pressure gauge is used for protecting the air pump from tripping.
4. A radioactive air-carrying effluent combined sampling device according to claim 3, wherein a one-way throttle valve a is arranged between the quick connector K and the chimney, and a one-way throttle valve B is arranged between the quick connector L and the chimney.
5. The radioactive aerosol and iodine sampling device according to claim 4, wherein the two aerosol and iodine sampling lines specifically comprise an aerosol and iodine sampling line a and an aerosol and iodine sampling line B, the two aerosol and iodine sampling lines respectively comprise a quick connector, an aerosol and iodine sampler, a mass flowmeter and a regulating valve, the three-way valve is sequentially connected with the quick connector a, the aerosol and iodine sampler a, the quick connector C, the mass flowmeter a and the regulating valve a of the aerosol and iodine sampling line a through a pipeline, and the regulating valve a is connected with the mass flowmeter C through a pipeline.
6. The radioactive air-carrier fluid combined sampling device according to claim 5, wherein the three-way valve is sequentially connected with a quick connector B of the aerosol and iodine sampling pipeline B, a quick connector D, a mass flowmeter B and a regulating valve B through a pipeline, and the regulating valve B is connected with the mass flowmeter C through a pipeline.
7. The radioactive air-carrying effluent combined sampling device according to claim 1, wherein the tritium sampling pipeline specifically comprises a quick connector G, a tritium sampler, a quick connector E, a mass flowmeter D and a regulating valve D, the quick connector L is sequentially connected with the quick connector G, the tritium sampler, the quick connector E, the mass flowmeter D and the regulating valve D through pipelines, and the regulating valve D is connected with a check valve through pipelines.
8. The radioactive air-carrier fluid combined sampling device according to claim 1, wherein the carbon-14 sampling pipeline specifically comprises a quick connector H, a carbon-14 sampler, a quick connector F, a mass flowmeter E and a regulating valve E, wherein the quick connector L is sequentially connected with the quick connector H, the carbon-14 sampler, the quick connector F, the mass flowmeter E and the regulating valve E through pipelines, and the regulating valve E is connected with a check valve through pipelines.
9. The radioactive air-carrying effluent combined sampling device according to claim 1, wherein the inert gas sampling pipeline specifically comprises a quick connector J, an inert gas sampler, a quick connector I, a mass flowmeter F and a regulating valve F, wherein the quick connector L is sequentially connected with the quick connector J, the inert gas sampler, the quick connector I, the mass flowmeter F and the regulating valve F through pipelines, and the regulating valve F is connected with a check valve through pipelines.
10. The radioactive gas-carrying effluent combined sampling device according to claim 1, further comprising an on-site control unit, wherein the on-site control unit is connected with the regulating valve, the mass flowmeter, the electric contact pressure gauge, the aerosol and iodine sampler, the tritium sampler, the carbon-14 sampler and the inert gas sampler through a network cable, and the on-site control unit controls the device to perform combined sampling of gas-carrying effluent tritium, carbon-14, inert gas, iodine and particles.

Description

Radioactive gas carrying effluent combined sampling device Technical Field The utility model belongs to the technical field of sampling and monitoring of airborne radioactive effluent, and particularly relates to a radioactive airborne radioactive effluent combined sampling device. Background According to the regulations in the environmental radiation protection of nuclear power plants, the monitoring items of the airborne radioactive effluent should include inert gas, iodine, particles (half-life not less than 8 d), carbon-14 and total tritium. In order to meet the requirements, the radioactive gas carrier effluent of the domestic nuclear power plant chimney discharges carbon-14 and total tritium, inert gas, iodine and particles (the half life is more than or equal to 8 d) for sampling are commonly adopted, and tritium, carbon-14, inert gas, iodine and particles are respectively arranged in three independent sampling devices, namely a tritium sampling device, a carbon-14 sampling device, an inert gas, iodine and particles sampling device. In the prior art, three independent sampling modes are adopted, so that the defects of large initial investment, large occupied factory building space, complex device, large operation and maintenance workload and the like exist. Therefore, the patent designs a set of device to realize the combined sampling of the air-carrying effluent tritium, carbon-14, inert gas, iodine and particles, and solves the problems. Disclosure of utility model The utility model provides a radioactive gas-carrying effluent combined sampling device which is used for solving the defects of large initial investment, large occupied factory space, complex device, large operation and maintenance workload and the like in the independent setting of three sampling devices in the prior art. The technical scheme of the utility model is as follows: The utility model provides a radioactive gas carrying 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, wherein the three-way valve is respectively connected with the quick connector K and one ends of the two aerosol and iodine sampling pipelines, the quick connector K is connected with a chimney, chimney gas enters the device from the quick connector K, the other ends of the two aerosol and iodine sampling pipelines are respectively connected with the air pump and a check valve through pipelines in sequence, a check valve pipeline is 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 the quick connector L through pipelines, the quick connector L is connected with the chimney, and the chimney gas returns to the chimney through the quick connector L. In some embodiments, a mass flowmeter C and a regulating valve C are arranged on the air pump and a pipeline between the air pump and the aerosol and iodine sampling pipe, the regulating valve C is connected with the air pump through a pipeline, and the mass flowmeter C is connected with the regulating valve C through a pipeline. In some embodiments, an electric contact pressure gauge is arranged on a pipeline between the regulating valve C and the air pump, and the electric contact pressure gauge is used for performing pump tripping protection on the air pump. In some embodiments, a one-way throttle valve A is arranged between the quick connector K and the chimney, and a one-way throttle valve B is arranged between the quick connector L and the chimney. In some embodiments, the two aerosol and iodine sampling lines specifically include an aerosol and iodine sampling line a and an aerosol and iodine sampling line B, the two aerosol and iodine sampling lines respectively include 2 quick connectors, an aerosol and iodine sampler, a mass flowmeter and a regulating valve, the three-way valve is sequentially connected with the quick connector a, the aerosol and iodine sampler a, the quick connector C, the mass flowmeter a and the regulating valve a of the aerosol and iodine sampling line a through a pipeline, and the regulating valve a is connected with the mass flowmeter C through a pipeline. In some embodiments, the three-way valve is connected in sequence by a pipe to a quick connector B of the aerosol and iodine sampling line B, the aerosol and iodine sampler B, a quick connector D, a mass flow meter B, and a regulating valve B, which is connected by a pipe to a mass flow meter C. In some embodiments, the tritium sampling line specifically includes a quick connector G, a tritium sampler, a quick connector E, a mass flowmeter D, and a regulating valve D, the quick connector L is con