A multi-functional gaseous tritium and carbon-14 sampling device and method for nuclear power plants

Abstract

This application belongs to the technical field of nuclear power plant effluent monitoring, and specifically relates to a multi-functional gaseous tritium and carbon-14 sampling device and method for nuclear power plants; this device includes: a first tritium-carbon sampling loop and a second tritium-carbon sampling loop that are respectively connected to a first chimney sampling loop and a second chimney sampling loop; a first tritium sampler and a first carbon-14 sampler connected in parallel are connected to the first tritium-carbon sampling loop; a second tritium sampler and a second carbon-14 sampler connected in parallel are connected to the second tritium-carbon sampling loop; the pipelines where the first tritium sampler is located, the pipeline where the second tritium sampler is located, the pipeline where the first carbon-14 sampler is located, and the pipeline where the second carbon-14 sampler is located are disconnected, and first quick connectors and second quick connectors are respectively arranged at the two disconnected ends. On the basis of the existing chimney sampling pipeline layout, a multi-functional gaseous tritium and carbon-14 sampling loop is designed to achieve redundancy of the sampling loop, tritium and carbon samplers, parallel sample collection, and separation of tritium and carbon-14.

Description

Technical Field

[0001] This application belongs to the technical field of nuclear power plant effluent monitoring, and specifically relates to a multi-functional gaseous tritium and carbon-14 sampling device and method for nuclear power plants. Background Art

[0002] When a nuclear power unit is designed, a tritium and carbon-14 sampling device is designed on the chimney for continuous sampling of tritium and carbon-14 in the radioactive gaseous effluent of the unit, so as to meet the requirements of relevant regulatory standards, environmental impact assessment documents, and regulatory authorities for continuous sampling and monitoring of radioactive effluent emissions from operating nuclear power plants.

[0003] In a certain nuclear power plant unit, a tritium-carbon sampling circuit is led out from the chimney sampling circuit of the unit. An air compressor pump is arranged downstream of the chimney sampling circuit. A tritium sampler and a carbon-14 sampler are connected in parallel on the tritium-carbon sampling circuit. When the air compressor pump downstream of the chimney sampling circuit fails or is under maintenance, the power supply bus is switched, or the tritium and carbon-14 samplers fail or are under maintenance, continuous sampling of tritium and carbon-14 cannot be achieved. Summary of the Invention

[0004] The purpose of this application is to provide a multi-functional gaseous tritium and carbon-14 sampling device and method for nuclear power plants, which solves the problem that continuous sampling of tritium and carbon-14 cannot be achieved in the prior art when the air compressor pump downstream of the chimney sampling circuit fails or is under maintenance, the power supply bus is switched, or the tritium and carbon-14 samplers fail or are under maintenance.

[0005] Technical solutions to achieve the purpose of this application:

[0006] The embodiment of this application provides a multi-functional gaseous tritium and carbon-14 sampling device for nuclear power plants, including: a first tritium-carbon sampling circuit and a second tritium-carbon sampling circuit;

[0007] The first tritium-carbon sampling circuit and the second tritium-carbon sampling circuit are respectively connected to a first chimney sampling circuit and a second chimney sampling circuit; the first chimney sampling circuit and the second chimney sampling circuit are connected in parallel and are both connected to the chimney pipeline of the nuclear power plant;

[0008] A first tritium sampler and a first carbon-14 sampler connected in parallel are connected to the first tritium-carbon sampling circuit; a second tritium sampler and a second carbon-14 sampler connected in parallel are connected to the second tritium-carbon sampling circuit;

[0009] The pipelines where the first tritium sampler is located, the pipelines where the second tritium sampler is located, the pipelines where the first carbon-14 sampler is located, and the pipelines where the second carbon-14 sampler is located are disconnected, and first quick connectors and second quick connectors are respectively arranged at the disconnected ends for connecting a connecting hose through the quick connectors to conduct sampling during sampling;

[0010] The positional relationship between the break of the first tritium sampler and the pipeline where it is located is different from that between the break of the first carbon-14 sampler and the pipeline where it is located, and the positional relationship between the break of the second tritium sampler and the pipeline where it is located is different from that between the break of the second carbon-14 sampler and the pipeline where it is located.

[0011] Optionally, two standby pipelines are connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, and the two standby pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler;

[0012] Valves are connected in series on both of the two standby pipelines.

[0013] Optionally, an air outlet valve and an air inlet valve are arranged on both the first tritium-carbon sampling loop and the second tritium-carbon sampling loop.

[0014] Optionally, the materials of all pipelines and valves in the device are kept consistent.

[0015] The embodiment of the present application further provides a method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant, which is applied to any one of the nuclear power plant multi-functional gaseous tritium and carbon-14 sampling devices provided in the above embodiments; the method includes:

[0016] Connect the first tritium sampler and the first carbon-14 sampler in parallel using two quick-connect hoses;

[0017] Alternatively, connect the first tritium sampler and the first carbon-14 sampler in series using one quick-connect hose;

[0018] Start the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler to sample tritium and carbon-14.

[0019] Optionally, after starting the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler to sample tritium and carbon-14, it further includes:

[0020] When the first tritium-carbon sampling loop cannot operate, if the first tritium sampler and the first carbon-14 sampler are connected in parallel, connect the second tritium sampler and the second carbon-14 sampler in parallel using two quick-connect hoses; if the first tritium sampler and the first carbon-14 sampler are connected in series, connect the second tritium sampler and the second carbon-14 sampler in series using one quick-connect hose;

[0021] Close the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler, and start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler for tritium and carbon-14 sampling.

[0022] Optionally, after connecting the first tritium sampler and the first carbon-14 sampler in parallel using two quick-connect hoses, the following steps are further included:

[0023] Connect the second tritium sampler and the second carbon-14 sampler in parallel using two quick-connect hoses;

[0024] Start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler for tritium and carbon-14 sampling.

[0025] Optionally, after connecting the first tritium sampler and the first carbon-14 sampler in series using one quick-connect hose, the following steps are further included:

[0026] Connect the second tritium sampler and the second carbon-14 sampler in series using one quick-connect hose;

[0027] Start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler for tritium and carbon-14 sampling.

[0028] Optionally, when there are two standby pipelines connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, and the two standby pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler, and valves are connected in series on both standby pipelines; after starting the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler for tritium and carbon-14 sampling, the following steps are further included:

[0029] When the first tritium sampler fails to sample, open the valves on the two standby pipelines. If the first tritium sampler and the first carbon-14 sampler are connected in parallel, connect the second tritium sampler and the first carbon-14 sampler in parallel using one quick-connect hose; if the first tritium sampler and the first carbon-14 sampler are connected in series, connect the second tritium sampler and the first carbon-14 sampler in series using one quick-connect hose;

[0030] Close the first tritium sampler and start the second tritium sampler for sampling;

[0031] When the first carbon-14 sampler fails to take a sample, open the valves on the two standby pipelines. If the first tritium sampler and the first carbon-14 sampler are in parallel, use a quick connector to connect a hose to parallel the first tritium sampler and the second carbon-14 sampler; if the first tritium sampler and the first carbon-14 sampler are in series, use a quick connector to connect a hose to series the first tritium sampler and the second carbon-14 sampler.

[0032] Close the first carbon-14 sampler and start the second carbon-14 sampler to take a sample.

[0033] Optionally, when there are two standby pipelines connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, the two standby pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler and the second carbon-14 sampler, and valves are connected in series on the two standby pipelines; the method includes:

[0034] Use four quick connectors to connect hoses to parallel the first tritium sampler, the first carbon-14 sampler, the second tritium sampler and the second carbon-14 sampler.

[0035] Open the valves on the two standby pipelines, and start the first tritium-carbon sampling loop, the first tritium sampler, the second tritium sampler, the first carbon-14 sampler and the second carbon-14 sampler to take samples of tritium and carbon-14.

[0036] The beneficial technical effects of the present application are as follows:

[0037] 1) For a nuclear power plant multi-functional gaseous tritium and carbon-14 sampling device and method provided by an embodiment of the present application, the first tritium-carbon sampling loop and the second tritium-carbon sampling loop are independent and redundant, one is in use and the other is in reserve, and the first tritium-carbon sampling loop and the second tritium-carbon sampling loop can be flexibly switched, improving the reliability of the sampling loop; the two groups of tritium samplers and carbon-14 samplers are independent and redundant, one is in use and the other is in reserve, and when any sampler fails, it can be timely switched to the standby sampler.

[0038] 2) For a nuclear power plant multi-functional gaseous tritium and carbon-14 sampling device and method provided by an embodiment of the present application, the first tritium-carbon sampling loop, the second tritium-carbon sampling loop and the samplers can be put into operation simultaneously to realize the collection of parallel samples, and the sampling efficiency can be mutually verified between the samplers, improving the accuracy of the sampling results; when the two groups of tritium and carbon-14 samplers are put into operation simultaneously, the collection rate of the samplers can be improved, the sampling volume can be increased, and the detection lower limit of gaseous tritium and carbon-14 can be reduced.

[0039] 3) A multi-functional gaseous tritium and carbon-14 sampling device and method provided by an embodiment of the present application. The tritium sampler and the carbon-14 sampler can perform parallel sampling to achieve the separation of tritiated water and other forms of tritium, and the separation of carbon dioxide and other forms of carbon. They can also perform serial sampling to directly achieve the separation of tritium and carbon-14 in the sampling process, reduce the radiochemical processing link of the sample, eliminate the uncertainty introduced in the radiochemical processing link, and improve the accuracy of the measurement result. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of a multi-functional gaseous tritium and carbon-14 sampling device provided by an embodiment of the present application;

[0041] Figure 2 It is a schematic flow diagram of a multi-functional gaseous tritium and carbon-14 sampling method provided by an embodiment of the present application.

[0042] In the figure:

[0043] 1 - First tritium-carbon sampling loop; 11 - First tritium sampler; 12 - First carbon-14 sampler;

[0044] 2 - Second tritium-carbon sampling loop; 21 - Second tritium sampler; 22 - Second carbon-14 sampler;

[0045] 3 - First chimney sampling loop;

[0046] 4 - Second chimney sampling loop;

[0047] 5 - Chimney pipeline;

[0048] 61 - First quick connector; 62 - Second quick connector;

[0049] 7 - Spare pipeline; 71 - Valve;

[0050] 81 - Inlet valve; 82 - Outlet valve. Detailed Embodiments

[0051] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, rather than all of them. Based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of protection of the present application.

[0052] Refer to Figure 1 , which is a schematic structural diagram of a multi-functional gaseous tritium and carbon-14 sampling device provided by an embodiment of the present application.

[0053] A multi-functional gaseous tritium and carbon-14 sampling device provided by an embodiment of the present application includes: a first tritium-carbon sampling loop 1 and a second tritium-carbon sampling loop 2;

[0054] The first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2 are respectively connected to a first chimney sampling loop 3 and a second chimney sampling loop 4; the first chimney sampling loop 3 and the second chimney sampling loop 4 are in parallel and are both connected to the chimney pipeline 5 of the nuclear power plant;

[0055] A first tritium sampler 11 and a first carbon-14 sampler 12 in parallel are connected to the first tritium-carbon sampling loop 1; a second tritium sampler 21 and a second carbon-14 sampler 22 in parallel are connected to the second tritium-carbon sampling loop 2;

[0056] The pipelines where the first tritium sampler 11 is located, the pipelines where the second tritium sampler 21 is located, the pipelines where the first carbon-14 sampler 12 is located, and the pipelines where the second carbon-14 sampler 22 is located are disconnected, and first quick connectors 61 and second quick connectors 62 are respectively arranged at the two disconnected ends for connecting a hose through the quick connectors to conduct sampling during sampling;

[0057] The positional relationship between the first tritium sampler 11 and the disconnection point of its pipeline is different from the positional relationship between the first carbon-14 sampler 12 and the disconnection point of its pipeline; the positional relationship between the second tritium sampler 21 and the disconnection point of its pipeline is different from the positional relationship between the second carbon-14 sampler 22 and the disconnection point of its pipeline.

[0058] It can be understood that the pipelines where the first tritium sampler 11 is located, the pipelines where the second tritium sampler 21 is located, the pipelines where the first carbon-14 sampler 12 is located, and the pipelines where the second carbon-14 sampler 22 is located are disconnected, and the corresponding gas paths are automatically interrupted to achieve the isolation of the samplers.

[0059] In the embodiment of the present application, the first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2 are independent and redundant, one is used and the other is reserved, and the first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2 can be flexibly switched, improving the reliability of the sampling loop.

[0060] In one example, when sampling tritium and carbon-14 using the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12, the first tritium sampler 11 and the first carbon-14 sampler 12 can be connected in parallel by using two quick-connect hoses; start the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12 to sample tritium and carbon-14. When the first tritium-carbon sampling loop 1 cannot operate, then use two quick-connect hoses to connect the second tritium sampler 21 and the second carbon-14 sampler 22 in parallel; close the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12, and start the second tritium-carbon sampling loop 2, the second tritium sampler 21, and the second carbon-14 sampler 22 to sample tritium and carbon-14.

[0061] In another example, for the problem in the current prior art that it is impossible to collect parallel samples of tritium and carbon-14 with a single sampling loop, this can be achieved by simultaneously enabling the first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2.

[0062] For example, use two quick-connect hoses to connect the first tritium sampler 11 and the first carbon-14 sampler 12 in parallel, and use two quick-connect hoses to connect the second tritium sampler 21 and the second carbon-14 sampler 22 in parallel; start the first tritium-carbon sampling loop 1, the first tritium sampler 11, the first carbon-14 sampler 12, the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler to conduct parallel sampling of tritium and carbon-14.

[0063] In the prior art, there is also a problem that when the carbon-14 sampler collects carbon-14, it will simultaneously collect some tritiated water (HTO), which requires further tritium-carbon radiochemical separation in the laboratory, increasing the analysis time and uncertainty of gaseous carbon-14. For this reason, as an example, a quick-connect hose can be used to connect the first tritium sampler 11 and the first carbon-14 sampler 12 in series; start the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12 to sample tritium and carbon-14, and achieve the separation of tritium and carbon-14 during sampling. The positional relationship between the first tritium sampler 11 and the disconnection point of the pipeline where it is located is the same as that between the second tritium sampler 21 and the disconnection point of the pipeline where it is located, thereby realizing the redundant backup of the tritium-carbon sampling loop and the sampler.

[0064] In some possible implementation manners of the embodiments of the present application, there are two standby pipelines 7 connected between the first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2, and the two standby pipelines 7 are respectively arranged at both ends of the first tritium sampler 11, the second tritium sampler 21, the first carbon-14 sampler 12, and the second carbon-14 sampler 22;

[0065] Valves 71 are connected in series on both of the two standby pipelines 7.

[0066] It can be understood that by using two standby pipelines 7, the first tritium sampler 11, the second tritium sampler 21, the first carbon-14 sampler 12, and the second carbon-14 sampler 22 can be made redundant with each other, with one in use and one in standby. When any sampler malfunctions, it can be promptly switched to the standby sampler.

[0067] In one example, when using the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12 for tritium and carbon-14 sampling, when the first tritium sampler 11 fails to sample, open the valves 71 on the two standby pipelines 7. If the first tritium sampler 11 and the first carbon-14 sampler 12 are in parallel, use a quick-connector connecting hose to connect the first quick-connector 61 on the pipeline where the second tritium sampler 21 is located to the second quick-connector 62 on the pipeline where the second tritium sampler 21 is located, and connect the second tritium sampler 21 and the first carbon-14 sampler 12 in parallel; if the first tritium sampler 11 and the first carbon-14 sampler 12 are in series, use a quick-connector connecting hose to connect the second tritium sampler 21 and the first carbon-14 sampler 12 in series; close the first tritium sampler 11 and start the second tritium sampler 21 for sampling.

[0068] In another example, when using the first tritium-carbon sampling loop 1, the first tritium sampler 11, and the first carbon-14 sampler 12 for tritium and carbon-14 sampling, when the first carbon-14 sampler 12 fails to sample, open the valves 71 on the two standby pipelines 7. If the first tritium sampler 11 and the first carbon-14 sampler 12 are in parallel, use a quick-connector connecting hose to connect the first quick-connector 61 on the pipeline where the second carbon-14 sampler 22 is located to the second quick-connector 62 on the pipeline where the second carbon-14 sampler 22 is located, and connect the first tritium sampler 11 and the second carbon-14 sampler 22 in parallel; if the first tritium sampler 11 and the first carbon-14 sampler 12 are in series, use a quick-connector connecting hose to connect the first tritium sampler 11 and the second carbon-14 sampler 22 in series; close the first carbon-14 sampler 12 and start the second carbon-14 sampler 22 for sampling.

[0069] To improve the sampling efficiency, in another example, four quick-connector connecting hoses can also be used to connect the first tritium sampler 11, the first carbon-14 sampler 12, the second tritium sampler 21, and the second carbon-14 sampler 22 in parallel; open the valves 71 on the two standby pipelines 7, and start the first tritium-carbon sampling loop 1, the first tritium sampler 11, the second tritium sampler 21, the first carbon-14 sampler 12, and the second carbon-14 sampler 22 for tritium and carbon-14 sampling.

[0070] In some possible implementation manners of the embodiments of the present application, an air outlet valve 82 and an air inlet valve 81 are provided on both the first tritium-carbon sampling loop 1 and the second tritium-carbon sampling loop 2.

[0071] In an example of actual application, to prevent an increase in the external leakage rate of the gas pipeline due to static corrosion caused by different materials, the materials of all pipelines and valves in the device are kept consistent.

[0072] A multifunctional gaseous tritium and carbon-14 sampling device for nuclear power plants provided by an embodiment of the present application. The first tritium-carbon sampling loop and the second tritium-carbon sampling loop are independent and redundant, one in use and one in reserve. The first tritium-carbon sampling loop and the second tritium-carbon sampling loop can be flexibly switched, improving the reliability of the sampling loop; two groups of tritium samplers and carbon-14 samplers are redundant, one in use and one in reserve. When any sampler fails, it can be promptly switched to the standby sampler.

[0073] Based on the multifunctional gaseous tritium and carbon-14 sampling device for nuclear power plants provided by the above embodiment, an embodiment of the present application further provides a method for multifunctional gaseous tritium and carbon-14 sampling in a nuclear power plant.

[0074] See Figure 2 , which is a schematic flow chart of a method for multifunctional gaseous tritium and carbon-14 sampling in a nuclear power plant provided by an embodiment of the present application.

[0075] A method for multifunctional gaseous tritium and carbon-14 sampling in a nuclear power plant provided by an embodiment of the present application is applied to any one of the multifunctional gaseous tritium and carbon-14 sampling devices provided by the above embodiment; the method includes:

[0076] S201: Connect the first tritium sampler and the first carbon-14 sampler in parallel using two quick-connect hoses;

[0077] Or, S202: Connect the first tritium sampler and the first carbon-14 sampler in series using one quick-connect hose;

[0078] S203: Start the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler to perform tritium and carbon-14 sampling.

[0079] In some possible implementation manners of the embodiment of the present application, after step S203, it further includes:

[0080] When the first tritium-carbon sampling loop cannot operate, if the first tritium sampler and the first carbon-14 sampler are connected in parallel, connect the second tritium sampler and the second carbon-14 sampler in parallel using two quick-connect hoses; if the first tritium sampler and the first carbon-14 sampler are connected in series, connect the second tritium sampler and the second carbon-14 sampler in series using one quick-connect hose;

[0081] Close the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler, and start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler to perform tritium and carbon-14 sampling.

[0082] In some possible implementation manners of the embodiments of the present application, after step S201, the following steps are further included:

[0083] Connect the second tritium sampler and the second carbon-14 sampler in parallel using two quick-connect hoses;

[0084] Start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler to perform tritium and carbon-14 sampling.

[0085] In some possible implementation manners of the embodiments of the present application, after step S202, the following steps are further included:

[0086] Connect the second tritium sampler and the second carbon-14 sampler in series using one quick-connect hose;

[0087] Start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler to perform tritium and carbon-14 sampling.

[0088] In some possible implementation manners of the embodiments of the present application, when there are two spare pipelines connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, the two spare pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler, and valves are connected in series on both spare pipelines; after step S203, the following steps are further included:

[0089] When the first tritium sampler cannot sample, open the valves on the two spare pipelines. If the first tritium sampler and the first carbon-14 sampler are connected in parallel, connect the second tritium sampler and the first carbon-14 sampler in parallel using one quick-connect hose; if the first tritium sampler and the first carbon-14 sampler are connected in series, connect the second tritium sampler and the first carbon-14 sampler in series using one quick-connect hose;

[0090] Close the first tritium sampler and start the second tritium sampler to sample;

[0091] When the first carbon-14 sampler cannot sample, open the valves on the two spare pipelines. If the first tritium sampler and the first carbon-14 sampler are connected in parallel, connect the first tritium sampler and the second carbon-14 sampler in parallel using one quick-connect hose; if the first tritium sampler and the first carbon-14 sampler are connected in series, connect the first tritium sampler and the second carbon-14 sampler in series using one quick-connect hose;

[0092] Close the first carbon-14 sampler and start the second carbon-14 sampler to sample.

[0093] In some possible implementation manners of the embodiments of the present application, when there are two standby pipelines connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, the two standby pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler and the second carbon-14 sampler, and valves are connected in series on both standby pipelines; the method includes:

[0094] Connect the first tritium sampler, the first carbon-14 sampler, the second tritium sampler and the second carbon-14 sampler in parallel using four quick-connect hoses;

[0095] Open the valves on the two standby pipelines, and start the first tritium-carbon sampling loop, the first tritium sampler, the second tritium sampler, the first carbon-14 sampler and the second carbon-14 sampler to perform tritium and carbon-14 sampling.

[0096] For the detailed description of a method for multi-functional gaseous tritium and carbon-14 sampling in a nuclear power plant provided by the embodiments of the present application, reference can be made to the relevant content in the device embodiment part, which will not be elaborated here.

[0097] A method for multi-functional gaseous tritium and carbon-14 sampling in a nuclear power plant provided by the embodiments of the present application, the first tritium-carbon sampling loop and the second tritium-carbon sampling loop are independent and redundant, one is in use and the other is in standby, and the first tritium-carbon sampling loop and the second tritium-carbon sampling loop can be flexibly switched, improving the reliability of the sampling loop; the two groups of tritium samplers and carbon-14 samplers are independent and redundant, one is in use and the other is in standby, and when any sampler fails, it can be switched to the standby sampler in time.

[0098] The above has described the present application in detail with reference to the drawings and embodiments, but the present application is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the purpose of the present application. The content not described in detail in the present application can all adopt the prior art.

Claims

1. A multi-functional gaseous tritium and carbon-14 sampling device for nuclear power plants, characterized in that, The device includes: a first tritium-carbon sampling loop and a second tritium-carbon sampling loop; The first tritium-carbon sampling loop and the second tritium-carbon sampling loop are respectively connected to a first chimney sampling loop and a second chimney sampling loop; the first chimney sampling loop and the second chimney sampling loop are in parallel and are both connected to the chimney pipeline of the nuclear power plant; A first tritium sampler and a first carbon-14 sampler in parallel are connected to the first tritium-carbon sampling loop; a second tritium sampler and a second carbon-14 sampler in parallel are connected to the second tritium-carbon sampling loop; The pipelines where the first tritium sampler is located, the pipelines where the second tritium sampler is located, the pipelines where the first carbon-14 sampler is located, and the pipelines where the second carbon-14 sampler is located are disconnected, and first quick connectors and second quick connectors are respectively arranged at the two disconnected ends for connecting a quick connector connecting hose to conduct sampling during sampling; The positional relationship between the first tritium sampler and the disconnection position of the pipeline where it is located is different from the positional relationship between the first carbon-14 sampler and the disconnection position of the pipeline where it is located, and the positional relationship between the second tritium sampler and the disconnection position of the pipeline where it is located is different from the positional relationship between the second carbon-14 sampler and the disconnection position of the pipeline where it is located; Two standby pipelines are connected between the first tritium-carbon sampling loop and the second tritium-carbon sampling loop, and the two standby pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler; Valves are connected in series on both of the two standby pipelines; An air outlet valve and an air inlet valve are arranged on both the first tritium-carbon sampling loop and the second tritium-carbon sampling loop.

2. The multi-functional gaseous tritium and carbon-14 sampling device for nuclear power plants according to claim 1, characterized in that, The materials of all pipelines and valves in the device are kept consistent.

3. A method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant, characterized in that, Applied to the nuclear power plant multi-functional gaseous tritium and carbon-14 sampling device according to any one of claims 1-2; the method includes: Using two quick connector connecting hoses to connect the first tritium sampler and the first carbon-14 sampler in parallel; Or, using one quick connector connecting hose to connect the first tritium sampler and the first carbon-14 sampler in series; Start the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler to conduct tritium and carbon-14 sampling.

4. The method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant according to claim 3, wherein After starting the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler to conduct tritium and carbon-14 sampling, it further includes: When the first tritium-carbon sampling loop cannot operate, if the first tritium sampler and the first carbon-14 sampler are in parallel, use two quick connector connecting hoses to connect the second tritium sampler and the second carbon-14 sampler in parallel; if the first tritium sampler and the first carbon-14 sampler are in series, use one quick connector connecting hose to connect the second tritium sampler and the second carbon-14 sampler in series; Close the first tritium-carbon sampling loop, the first tritium sampler, and the first carbon-14 sampler, and start the second tritium-carbon sampling loop, the second tritium sampler, and the second carbon-14 sampler to conduct tritium and carbon-14 sampling.

5. The method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant according to claim 3, characterized in that Connect the first tritium sampler and the first carbon-14 sampler in parallel using two quick-connect hoses, and then the following steps are further included: Connect the second tritium sampler and the second carbon-14 sampler in parallel using two quick-connect hoses; Start the second tritium-carbon sampling circuit, the second tritium sampler, and the second carbon-14 sampler to conduct tritium and carbon-14 sampling.

6. The method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant according to claim 3, characterized in that, Connect the first tritium sampler and the first carbon-14 sampler in series using one quick-connect hose, and then the following steps are further included: Connect the second tritium sampler and the second carbon-14 sampler in series using two quick-connect hoses; Start the second tritium-carbon sampling circuit, the second tritium sampler, and the second carbon-14 sampler to conduct tritium and carbon-14 sampling.

7. The method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant according to claim 3, characterized in that, When there are two spare pipelines connected between the first tritium-carbon sampling circuit and the second tritium-carbon sampling circuit, and the two spare pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler, and valves are connected in series on both of the two spare pipelines; after starting the first tritium-carbon sampling circuit, the first tritium sampler, and the first carbon-14 sampler to conduct tritium and carbon-14 sampling, the following steps are further included: When the first tritium sampler fails to sample, open the valves on the two spare pipelines. If the first tritium sampler and the first carbon-14 sampler are in parallel, connect the second tritium sampler and the first carbon-14 sampler in parallel using one quick-connect hose; if the first tritium sampler and the first carbon-14 sampler are in series, connect the second tritium sampler and the first carbon-14 sampler in series using one quick-connect hose; Close the first tritium sampler and start the second tritium sampler to sample; When the first carbon-14 sampler fails to sample, open the valves on the two spare pipelines. If the first tritium sampler and the first carbon-14 sampler are in parallel, connect the first tritium sampler and the second carbon-14 sampler in parallel using one quick-connect hose; if the first tritium sampler and the first carbon-14 sampler are in series, connect the first tritium sampler and the second carbon-14 sampler in series using one quick-connect hose; Close the first carbon-14 sampler and start the second carbon-14 sampler to sample.

8. The method for sampling multi-functional gaseous tritium and carbon-14 in a nuclear power plant according to claim 3, wherein When there are two spare pipelines connected between the first tritium-carbon sampling circuit and the second tritium-carbon sampling circuit, and the two spare pipelines are respectively arranged at both ends of the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler, and valves are connected in series on both of the two spare pipelines; the method includes: Connect the first tritium sampler, the first carbon-14 sampler, the second tritium sampler, and the second carbon-14 sampler in parallel using four quick-connect hoses; Open the valves on the two spare pipelines and start the first tritium-carbon sampling circuit, the first tritium sampler, the second tritium sampler, the first carbon-14 sampler, and the second carbon-14 sampler to conduct tritium and carbon-14 sampling.

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