Tritium monitoring device

Abstract

The tritium monitoring device comprises a working frame, and a scintillation spectrometer, a sample distribution module and a sample supply module which are arranged on the working frame, and the sample distribution module comprises a to-be-detected station, a complete detection station, a sample distribution assembly, a detection port and a clamping assembly. And the clamping assembly can drive the sampling bottle to be transferred among the to-be-detected station, the finished detection station, the positioning assembly and the detection port. According to the tritium monitoring device disclosed by the embodiment of the invention, automatic sample adding of the sampling bottle is realized through cooperation of the sample preparation module and the sample supply module; meanwhile, the sampling bottles after sample adding can be automatically moved to the monitoring station of the scintillation spectrometer for detection, the sampling bottles after detection can be automatically classified through the clamping assembly, manual interference is not needed in the whole monitoring process, the intelligent degree is high, and radioactive potential safety hazards caused by manual operation are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation monitoring, and in particular to a tritium monitoring device. Background Art

[0002] During the operation of a pressurized water reactor nuclear power plant, the reactor coolant pipes may experience a breakage accident, resulting in the leakage of nuclear fission products (including radioactive substances such as aerosols, iodine isotopes, and inert gases) through the steam generator and associated systems. These radioactive gaseous substances diffuse into the atmospheric environment through the plant ventilation system, causing regional radioactive contamination. More seriously, the radioactive gaseous substances leaked under accident conditions will remain suspended in the air of the operation area for a long time and cause significant internal irradiation hazards after entering the human body through the respiratory system. In addition, the liquid and gaseous products generated during the nuclear fuel cycle and waste treatment processes also pose radioactive risks, and tritium requires special attention due to its special physical and chemical properties.

[0003] As a β emitter, tritium has a half-life as long as 12.6 years and has extremely strong environmental migration ability. Tritium in the air easily combines with hydroxyl groups to form tritiated water vapor, enters the ecosystem through the water cycle system, and significantly increases the risk of human radiation exposure. Current regulations require strict continuous monitoring of the tritium activity concentration in the liquid effluents of nuclear facilities, and when the monitoring value exceeds the preset threshold, the alarm system needs to be triggered immediately. The current mainstream online tritium monitoring equipment adopts liquid scintillation spectrometry technology, which has advantages such as high detection efficiency, sensitivity to low-energy β particles, and single-photon counting ability, but still has defects in practical applications.

[0004] Existing technical solutions usually require off-line sampling and analysis: after operators regularly collect the primary coolant water samples, the samples need to be transferred to the laboratory for multi-stage manual processing, including distillation concentration and purification, quantitative mixing of scintillation liquid, sample bottle encapsulation, etc. Finally, data is obtained by batch testing on the machine. This traditional method has the following technical defects: (1) The detection cycle is extended due to multiple manual operation links; (2) Operators need to directly contact high-activity samples, resulting in significant internal and external irradiation risks; (3) Open sample processing is prone to cross-contamination, affecting the measurement accuracy; (4) The discrete sampling mode is difficult to achieve continuous dose assessment, resulting in monitoring blind spots. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a tritium monitoring device with rapid response, high intelligence, high sensitivity, and high safety.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions.

[0007] The present application provides a tritium monitoring device, which includes a working framework, a scintillation spectrometer, a sample preparation module, and a sample supply module arranged on the working framework;

[0008] The scintillation spectrometer includes a shielding layer, a monitoring component arranged inside the shielding layer, a detection channel penetrating through the inside of the shielding layer, and a sample lifting device capable of driving a sampling bottle to move inside the detection channel;

[0009] The sample preparation module includes an inspection waiting station, a completed inspection station, a sample preparation component, a clamping component capable of moving in a space coordinate system, and a detection port communicated with one end of the detection channel far away from the shielding layer;

[0010] The sample preparation component includes a positioning component fixedly arranged on the working framework, a sample preparation arm communicated with the sample supply module, and a sample outlet head. The positioning component is used for positioning the sampling bottle. The sample outlet head is fixedly arranged on the sample preparation arm. The sample supply module can output sample water and scintillation solution to the sampling bottle at the position of the positioning component through the sample preparation arm and the sample outlet head;

[0011] Wherein, the clamping component is used for clamping the sampling bottle and can drive the sampling bottle to transfer between the inspection waiting station, the completed inspection station, the positioning component, and the detection port. The sampling bottle can enter the inside of the shielding layer through the detection port and the detection channel. A monitoring station is arranged inside the detection channel. The monitoring component can detect the sampling bottle at the position of the monitoring station. The sample lifting device can move the sampled bottle after detection to the opening position of the detection port.

[0012] Further defined, for the above tritium monitoring device, wherein, the sample preparation module further includes an X-direction driving component fixedly arranged on the working framework, a Y-direction driving component fixedly arranged on the moving end of the X-direction driving component, and a Z-direction driving component fixedly arranged on the moving end of the Y-direction driving component;

[0013] Wherein, the clamping component is fixedly arranged on the moving end of the Z-direction driving component.

[0014] Further defined, for the above tritium monitoring device, wherein, the sample preparation module further includes a gushing cleaning pool. The sample preparation arm can drive the sample outlet head to transfer between the positioning component and the gushing cleaning pool, and can drive the sample outlet head to insert into the cleaning water in the gushing cleaning pool;

[0015] Wherein, the sample supply module is communicated with the gushing cleaning pool and can directly output cleaning water to the gushing cleaning pool, and can also output cleaning water to the gushing cleaning pool through the sample preparation arm and the sample outlet head.

[0016] Further defined, for a tritium monitoring device as described above, wherein the scintillation spectrometer further includes a light-shielding module for shielding light in the detection channels, an electrostatic eliminator for eliminating static electricity from the sampling bottles, and a position detection unit for positioning the sampling bottles in the detection channels.

[0017] Further defined, for a tritium monitoring device as described above, wherein the scintillation spectrometer further includes a refrigeration module for dissipating heat from the monitoring components;

[0018] Wherein, the refrigeration module is connected to the sample supply module, and the cooling water of the refrigeration module can be discharged through the sample supply module.

[0019] Further defined, for a tritium monitoring device as described above, wherein the monitoring components include two photomultiplier tubes symmetrically arranged with respect to the monitoring station, a voltage divider respectively electrically connected to the two photomultiplier tubes, and a preamplifier respectively electrically connected to the two voltage dividers;

[0020] Wherein, the monitoring components further include a high-voltage power supply for outputting high voltage to the two photomultiplier tubes and a low-voltage power supply for outputting low voltage to the two preamplifiers.

[0021] Further defined, for a tritium monitoring device as described above, wherein an external electrical interface coupled to the scintillation spectrometer is further fixedly provided on the working frame.

[0022] Further defined, for a tritium monitoring device as described above, wherein an electrical module is further fixedly provided on the working frame.

[0023] Further defined, for a tritium monitoring device as described above, wherein the electrical module includes an interactive screen fixedly provided on the outer surface of the working frame, and a power supply module, a control module, and a terminal block connected to the interactive screen.

[0024] Further defined, for a tritium monitoring device as described above, wherein an openable and closable first cavity, second cavity, third cavity, and fourth cavity are provided inside the working frame;

[0025] Wherein, the scintillation spectrometer is arranged in the first cavity, the sample preparation module is arranged in the third cavity, the sample supply module is arranged in the fourth cavity, and the second cavity is used for installing the electrical module.

[0026] The present invention has at least the following beneficial effects:

[0027] 1. The automatic sampling of the sampling bottle is realized through the cooperation of the sample preparation module and the sample supply module. After the sampling is completed, the sampling bottle can be automatically moved to the monitoring station of the scintillation spectrometer for detection. After the detection is completed, the sampling bottle can be automatically classified by the clamping component. The entire monitoring process does not require manual intervention, with a high degree of intelligence, effectively avoiding radioactive safety hazards caused by manual operation;

[0028] 2. When the sample outlet head completes a sample preparation cycle, the sample preparation arm drives the sample outlet head to insert into the cleaning water of the gushing spring cleaning pool, thereby realizing the cleaning of the outer surface of the sample outlet head. At the same time, the sample supply module outputs cleaning water into the gushing spring cleaning pool through the sample preparation arm and the sample outlet head, and then completes the internal cleaning of the sample outlet head. After the cleaning is completed, the sample preparation arm can perform sample preparation on the sampling bottle at the positioning component position without causing pollution to subsequent sample preparation, ensuring the accuracy of subsequent sample preparation and detection. Brief Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the tritium monitoring device according to the embodiment of the present application;

[0030] Figure 2 It is a schematic structural diagram of the tritium monitoring device according to the embodiment of the present application;

[0031] Figure 3 It is a schematic internal structure diagram of the tritium monitoring device according to the embodiment of the present application;

[0032] Figure 4 It is a schematic structural diagram of the "sample preparation module 400" part of the tritium monitoring device according to the embodiment of the present application;

[0033] Figure 5 It is an enlarged schematic structural diagram of the "sample preparation arm 481" part of the tritium monitoring device according to the embodiment of the present application;

[0034] Figure 6 It is a schematic structural diagram of the tritium monitoring device according to the embodiment of the present application;

[0035] Figure 7 It is a schematic structural diagram of the "scintillation spectrometer 200" part of the tritium monitoring device according to the embodiment of the present application;

[0036] Figure 8 It is a schematic structural diagram of the "sample supply module 500" part of the tritium monitoring device according to the embodiment of the present application;

[0037] Figure 9 It is the monitoring principle diagram of the "sample supply module 200" of the tritium monitoring device according to the embodiment of the present application.

[0038] Reference Signs

[0039] Working framework - 100, first cavity - 120, second cavity - 130, third cavity - 140, fourth cavity - 150, scintillation spectrometer - 200, shielding layer - 210, detection channel - 220, monitoring station - 221, light-shielding module - 230, static eliminator - 240, preamplifier processing board - 250, photomultiplier tube - 260, voltage divider - 261, preamplifier - 262, high-voltage power supply - 263, low-voltage power supply - 264, sample lifting device - 270, position detection unit - 280, refrigeration module - 290, cooling pipeline - 291, cooling check valve - 292, electrical module - 300, interactive screen - 310, power supply module - 320, control module - 330, terminal block - 340, sample preparation module - 400, X-direction driving component - 410, Y-direction driving component - 420, Z-direction driving component - 430, clamping component - 440, to-be-inspected station - 450, inspected station - 460, detection port - 470, sample preparation arm - 481, sample outlet head - 482, positioning component - 483, gushing cleaning pool - 490, sample supply module - 500, scintillation liquid cavity - 510, first liquid distribution channel - 511, liquid storage cavity - 520, bottom discharge pipeline - 521, liquid storage pipeline - 522, overflow pipeline - 523, external cleaning pipeline - 524, first distribution pipeline - 525, liquid outlet solenoid valve - 526, cleaning pipeline - 530, liquid inlet solenoid valve - 531, sampling pipeline - 540, sample discharge pipeline - 550, flowmeter - 551, diaphragm pump - 560, waste liquid inlet pipe - 561, waste liquid discharge pipe - 562, waste liquid check valve - 563, liquid distribution three-way solenoid valve - 570, second liquid distribution channel - 571, liquid distribution metering plunger pump - 573, rotary pump - 580, gushing liquid inlet pipeline - 581, sampling three-way solenoid valve - 590, sampling metering plunger pump - 591, second distribution pipeline - 592, external electrical interface - 600. Detailed implementation manners

[0040] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0041] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0042] The following will combine the accompanying drawings to describe in detail the tritium monitoring device provided by the embodiments of this application through specific embodiments and their application scenarios.

[0043] Embodiment 1

[0044] As Figures 1 to 9 shown, the embodiment of this application provides a tritium monitoring device, including a working frame 100, a scintillation spectrometer 200, a sample preparation module 400, and a sample supply module 500 provided on the working frame 100.

[0045] The scintillation spectrometer 200 includes a shielding layer 210, a monitoring component provided in the shielding layer 210, a detection channel 220 penetrating through the inside of the shielding layer 210, and a sample lifting device 270 capable of driving a sampling bottle to move in the detection channel 220. The sample preparation module 400 includes a to-be-inspected station 450, a completed-inspection station 460, a sample preparation component, a clamping component 440 capable of moving in a space coordinate system, and a detection port 470 communicating with one end of the detection channel 220 away from the shielding layer 210.

[0046] The sample preparation component includes a positioning component 483 fixedly provided on the working frame 100, a sample preparation arm 481 communicating with the sample supply module 500, and a sample outlet head 482. The sample outlet head 482 is fixedly provided on the sample preparation arm 481. The sample supply module 500 can output sample water and scintillation liquid to the sampling bottle at the position of the positioning component 483 through the sample preparation arm 481 and the sample outlet head 482.

[0047] Among them, the positioning component 483 is used to position the sampling bottle, the clamping component 440 is used to clamp the sampling bottle and can drive the sampling bottle to transfer between the to-be-inspected station 450, the completed-inspection station 460, the positioning component 483, and the detection port 470. The sampling bottle can enter the inside of the shielding layer 210 through the detection port 470 and the detection channel 220. A monitoring station 221 is provided in the detection channel 220, and the monitoring component can detect the sampling bottle at the corresponding position of the monitoring station 221. The sample lifting device 270 can move the sampled bottle that has been detected to the opening position of the detection port 470.

[0048] It can be understood that during detection, the clamping assembly 440 can clamp the sampling bottle at the position of the to-be-inspected station 450, and move the sampling bottle at the position of the to-be-inspected station 450 to the positioning assembly 483 for positioning. The sample supply module 500 outputs sample water and scintillation liquid to the sampling bottle at the positioning assembly 483 through the sample dispensing arm 481 and the sample outlet head 482. Then, the clamping assembly 440 clamps the sampling bottle that has been sample-dispensed at the position of the positioning assembly 483, and moves the sampling bottle to the corresponding position of the detection port 470. The sampled bottle after sample dispensing enters the interior of the shielding layer 210 through the detection port 470 and the detection channel 220 and is positioned at the monitoring station 221. The monitoring assembly detects the sampling bottle at the monitoring station 221. After the detection is completed, the detection port 470 moves the sampling bottle in the detection channel 220 to the opening of the detection port 470, and the clamping assembly 440 clamps and moves the sampling bottle that has been detected at the position of the detection port 470 to the completed-inspection station 460, thus completing a complete automatic sample dispensing and detection process.

[0049] In the embodiment of the present application, by using the above-mentioned tritium monitoring device, the automatic sample addition of the sampling bottle is realized through the cooperation of the sample dispensing module 400 and the sample supply module 500. At the same time, the sampling bottle after sample addition can be automatically moved to the monitoring station 221 of the scintillation spectrometer 200 for detection, and the sampling bottle after detection can be automatically classified by the clamping assembly 440. The entire monitoring process does not require manual intervention, has a high degree of intelligence, and effectively avoids the radioactive safety hazards caused by manual operation.

[0050] In a preferred embodiment, as Figures 3 to 5 shown, the sample dispensing module 400 further includes an X-direction driving assembly 410 fixedly arranged on the working frame 100, a Y-direction driving assembly 420 fixedly arranged on the moving end of the X-direction driving assembly 410, and a Z-direction driving assembly 430 fixedly arranged on the moving end of the Y-direction driving assembly 420.

[0051] Among them, the clamping assembly 440 is fixedly arranged on the moving end of the Z-direction driving assembly 430.

[0052] It can be understood that through the cooperation of the X-direction driving assembly 410, the Y-direction driving assembly 420, and the Z-direction driving assembly 430, the movement of the clamping assembly 440 in the space coordinate system can be realized.

[0053] It should be noted that the moving driving form of the clamping assembly 440 is not limited to the above one. For example, the driving structure of the clamping assembly 440 can also be set as a multi-axis robotic arm structure, as long as the transfer of the clamping assembly 440 between the to-be-inspected station 450, the completed-inspection station 460, the positioning assembly 483, and the detection port 470 can be realized, which will not be elaborated here.

[0054] In a preferred embodiment, asFigures 4 to 6 As shown in the figure, the sample preparation module 400 further includes a gushing cleaning pool 490 fixedly arranged on the working frame 100. The sample preparation arm 481 can drive the sample delivery head 482 to transfer between the positioning assembly 483 and the gushing cleaning pool 490, and can drive the sample delivery head 482 to insert into the cleaning water in the gushing cleaning pool 490.

[0055] Among them, the sample supply module 500 is communicated with the gushing cleaning pool 490 and can directly output cleaning water into the gushing cleaning pool 490, and can also output cleaning water into the gushing cleaning pool 490 through the sample preparation arm 481 and the sample delivery head 482.

[0056] In the embodiment of the present application, by adopting the above-mentioned tritium monitoring device, after the sample delivery head 482 completes a sample preparation cycle, the sample preparation arm 481 drives the sample delivery head 482 to insert into the cleaning water in the gushing cleaning pool 490, so as to realize the cleaning of the outer surface of the sample delivery head 482. At the same time, the sample supply module 500 outputs cleaning water into the gushing cleaning pool 490 through the sample preparation arm 481 and the sample delivery head 482, and then completes the internal cleaning of the sample delivery head 482. After the cleaning is completed, the sample preparation arm 481 can perform sample preparation on the sampling bottle at the position of the positioning assembly 483 without causing pollution to subsequent sample preparation, ensuring the accuracy of subsequent sample preparation and detection.

[0057] In a preferred embodiment, as Figure 6 、 Figure 7 shown, the scintillation spectrometer 200 further includes a light shielding module 230 for shielding the detection channel 220 from light, an electrostatic elimination device 240 for eliminating static electricity of the sampling bottle in the detection channel 220, and a position detection unit 280 for positioning the sampling bottle in the detection channel 220.

[0058] In a preferred embodiment, as Figure 6 、 Figure 7 、 Figure 9 shown, the monitoring component includes two photomultiplier tubes 260 symmetrically arranged with respect to the monitoring station 221, two voltage dividers 261 respectively electrically connected to the two photomultiplier tubes 260, and two preamplifiers 262 respectively electrically connected to the two voltage dividers 261. It further includes a high-voltage power supply 263 for outputting high voltage to the two photomultiplier tubes 260 and a low-voltage power supply 264 for outputting low voltage to the two preamplifiers 262.

[0059] It can be understood that the photomultiplier tube 260 can receive the fluorescent photons emitted by the sampling bottle at the position of the monitoring station 221, convert them into photoelectrons through the photocathode, and the internal dynodes (multiplier electrodes) multiply the electrons in multiple stages under the high-voltage electric field, and finally output a measurable electrical pulse signal; the high-voltage power supply 263 can provide the high voltage required for the operation of the photomultiplier tube 260 to ensure that the electrons are gradually accelerated between the dynodes to achieve signal amplification; the voltage divider 261 can distribute the total voltage proportionally to each dynode to form a gradient electric field to control the electron multiplication process; the low-voltage power supply 264 can supply power to the preamplifier 262 and the subsequent electronic circuits (such as the signal processing module) to ensure low-noise signal amplification and transmission; the preamplifier 262 is used to preliminarily amplify the weak electrical pulse signal output by the photomultiplier tube 260, and at the same time match the impedance to reduce distortion and noise during signal transmission.

[0060] In a preferred embodiment, as Figure 6 、 Figure 7 shown, the scintillation spectrometer 200 further includes a preamplifier processing board 250 coupled to the preamplifier 262.

[0061] In a preferred embodiment, as Figure 6 、 Figure 7 shown, the scintillation spectrometer 200 further includes a refrigeration module 290 for cooling the monitoring components.

[0062] Among them, the refrigeration module 290 is connected to the sample supply module 500, and the cooling water of the refrigeration module 290 can be discharged through the sample supply module 500.

[0063] In a preferred embodiment, as Figures 2 to 4 、 Figure 6 shown, an electrical module 300 is also fixedly provided on the working frame 100.

[0064] In a preferred embodiment, as Figure 6 shown, the electrical module 300 includes an interactive screen 310 fixedly arranged on the outer surface of the working frame 100 and a power supply module 320, a control module 330, and a terminal block 340 connected to the interactive screen 310.

[0065] In a preferred embodiment, as Figure 6 shown, an external electrical interface 600 coupled to the scintillation spectrometer 200 is also fixedly provided on the working frame 100.

[0066] In a preferred embodiment, as Figure 3 、 Figure 4 shown, the working frame 100 is provided with an openable and closable first cavity 120, a second cavity 130, a third cavity 140, and a fourth cavity 150.

[0067] Among them, the scintillation spectrometer 200 is fixedly arranged in the first cavity 120, the electrical module 300 is fixedly arranged in the second cavity 130, the sample preparation module 400 is fixedly arranged in the third cavity 140, and the sample supply module 500 is fixedly arranged in the fourth cavity 150.

[0068] In a preferred embodiment, as Figure 3 、 Figure 4 shown, the first cavity 120 and the fourth cavity 150 are arranged at the bottom of the working frame 100, and the second cavity 130 and the third cavity 140 are arranged at the top of the working frame 100.

[0069] Embodiment 2

[0070] As Figures 1 to 9 shown, an embodiment of the present application provides a tritium monitoring device, including a sample preparation module 400 and a sample supply module 500 for supplying liquid to the sample preparation module 400.

[0071] The sample preparation module 400 includes a sample preparation arm 481 fixedly arranged on the working frame, a positioning component 483 for positioning the sampling bottle, and a sample outlet head 482 fixedly arranged on the sample preparation arm 481.

[0072] The sample supply module 500 includes a scintillation liquid chamber 510 and a liquid storage chamber 520, and further includes a scintillation liquid supply passage communicating with the scintillation liquid chamber 510, a cleaning supply passage and a sample supply passage communicating with the liquid storage chamber 520.

[0073] Among them, the scintillation liquid supply passage communicates with the sample preparation module 400 and can output scintillation liquid through the sample outlet head 482, the sample supply passage communicates with the sample preparation module 400 and can output clean water or sample water through the sample outlet head 482, and the cleaning supply passage is used for the input and discharge of clean water in the liquid storage chamber 520 and the discharge of sample water in the liquid storage chamber 520.

[0074] In the embodiment of the present application, by using the above tritium monitoring device, scintillation liquid and sample water are respectively output to the sample preparation module 400 through the scintillation liquid supply passage and the sample supply passage, so as to realize automatic sample preparation of the sampling bottle. The two independent liquid supply passages can ensure the accuracy of sample preparation. At the same time, a cleaning supply passage communicating with the liquid storage chamber 520 is also provided, which can self-clean the liquid storage chamber 520 before and after a single detection, eliminate the risk of cross-contamination when preparing samples for multiple sampling bottles, and further improve the reliability of the detection results.

[0075] In a preferred embodiment, as Figure 6 、 Figure 8As shown, the scintillation fluid supply passage includes a dispensing three-way solenoid valve 570. A first dispensing passage 511 is provided in communication between the liquid inlet end of the dispensing three-way solenoid valve 570 and the scintillation fluid chamber 510. The first liquid outlet end of the dispensing three-way solenoid valve 570 is connected to a dispensing metering plunger pump 573, and a second dispensing passage 571 is provided in communication between the second liquid outlet end and the sample dispensing arm 481.

[0076] Among them, when the dispensing three-way solenoid valve 570 is in the open state, the dispensing metering plunger pump 573 can output the scintillation fluid in the scintillation fluid chamber 510 to the sample dispensing module 400 through the first dispensing passage 511 and the second dispensing passage 571.

[0077] In a preferred embodiment, as Figure 6 、 Figure 8 shown, the sample supply passage includes a liquid inlet solenoid valve 531 and a sampling three-way solenoid valve 590.

[0078] A sampling pipeline 540 is connected to the first liquid inlet end of the liquid inlet solenoid valve 531, and a liquid storage pipeline 522 is provided in communication between the liquid outlet end and the liquid storage chamber 520.

[0079] A first distribution pipeline 525 is provided in communication between the liquid inlet end of the sampling three-way solenoid valve 590 and the liquid storage chamber 520. The first liquid outlet end of the sampling three-way solenoid valve 590 is connected to a sampling metering plunger pump 591, and a second distribution pipeline 592 is provided in communication between the second liquid outlet end and the sample dispensing arm 481.

[0080] Among them, when the liquid inlet solenoid valve 531 is in the open state, the sampling pipeline 540 can input sample water into the liquid storage chamber 520 through the liquid storage pipeline 522.

[0081] When the sampling three-way solenoid valve 590 is in the open state, the sampling metering plunger pump 591 can output the sample water in the liquid storage chamber 520 to the sample dispensing module 400 through the first distribution pipeline 525 and the second distribution pipeline 592.

[0082] In a preferred embodiment, as Figure 6 、 Figure 8 shown, the cleaning supply passage includes a liquid outlet solenoid valve 526 and a cleaning pipeline 530 connected to the second liquid inlet end of the liquid inlet solenoid valve 531.

[0083] A sample discharge pipeline 550 is connected to the liquid outlet end of the liquid outlet solenoid valve 526. A bottom discharge pipeline 521 is connected between the first liquid inlet end of the liquid outlet solenoid valve 526 and the bottom of the liquid storage chamber 520, and an overflow pipeline 523 is connected between the second liquid inlet end and the top of the liquid storage chamber 520.

[0084] Among them, when the second liquid inlet end of the liquid inlet solenoid valve 531 is in the open state, the cleaning pipeline 530 can input cleaning water into the liquid storage chamber 520 through the liquid storage pipeline 522.

[0085] When the first liquid inlet end of the liquid outlet electro-ball valve 526 is in the open state, the cleaning water or sample water in the liquid storage cavity 520 can be discharged through the bottom discharge pipeline 521 and the sample discharge pipeline 550; when the second liquid inlet end of the liquid outlet electro-ball valve 526 is in the open state, the cleaning water or sample water in the liquid storage cavity 520 can be discharged through the overflow pipeline 523 and the sample discharge pipeline 550.

[0086] It can be understood that since the overflow pipeline 523 is connected to the top of the liquid storage cavity 520, when the cleaning water or sample water is input into the liquid storage cavity 520, the excess cleaning water or sample water will overflow through the overflow pipeline 523, so as to realize the complete immersion cleaning inside the liquid storage cavity 520, while the bottom discharge pipeline 521 is connected to the bottom of the liquid storage cavity 520, which can ensure the completeness of the liquid discharge of the liquid storage cavity 520.

[0087] In a preferred embodiment, as Figure 6 、 Figure 8 shown, a flow meter 551 for monitoring the flowing liquid is provided on the sample discharge pipeline 550.

[0088] In a preferred embodiment, as Figures 3 to 6 、 Figure 8 shown, the sample preparation module 400 further includes a gushing cleaning pool 490 communicated with the sample supply module 500. The sample preparation arm 481 can drive the sample outlet head 482 to transfer between the positioning component 483 and the gushing cleaning pool 490, and can drive the sample outlet head 482 to insert into the cleaning water in the gushing cleaning pool 490. The cleaning supply path further includes a diaphragm pump 560 and a rotary pump 580.

[0089] A waste liquid inlet pipe 561 is connected between the liquid inlet end of the diaphragm pump 560 and the bottom of the gushing cleaning pool 490, and the liquid outlet end is communicated with the sample discharge pipeline 550.

[0090] An external cleaning pipeline 524 is connected between the liquid inlet end of the rotary pump 580 and the liquid storage cavity 520, and a gushing liquid inlet pipeline 581 is connected between the liquid outlet end and the gushing cleaning pool 490.

[0091] Among them, a waste liquid check valve 563 is provided on the waste liquid discharge pipe 562, and the conduction direction of the waste liquid check valve 563 is from the diaphragm pump 560 to the sample discharge pipeline 550 side.

[0092] The rotary pump 580 can output the cleaning water in the liquid storage cavity 520 to the gushing cleaning pool 490 through the gushing liquid inlet pipeline 581, and the diaphragm pump 560 can discharge the cleaning water in the gushing cleaning pool 490 through the waste liquid discharge pipe 562 and the sample discharge pipeline 550.

[0093] In a preferred embodiment, as Figures 6 to 8As shown, it further includes a scintillation spectrometer 200 for detecting the sampling bottle. The scintillation spectrometer 200 includes a monitoring component and a refrigeration module 290 for cooling the monitoring component.

[0094] Among them, the liquid outlet end of the refrigeration module 290 is connected with a cooling pipeline 291 communicated with the waste liquid discharge pipe 562. A cooling check valve 292 is arranged on the cooling pipeline 291. The conducting direction of the cooling check valve 292 is from the refrigeration module 290 to the waste liquid discharge pipe 562 side.

[0095] Embodiment 3

[0096] The embodiment of the present application provides a tritium monitoring method for the tritium monitoring device in the above embodiment, including:

[0097] Obtain a detection execution instruction;

[0098] Output a predetermined dose of scintillation liquid and sample water to the sample preparation module 400 through the scintillation liquid supply path and the sample supply path respectively, so as to realize the sample preparation of the sampling bottle at the corresponding position of the positioning component 483;

[0099] After the sample preparation is completed, empty the sample water in the liquid storage cavity 520 through the cleaning supply path;

[0100] Circulate cleaning water in the liquid storage cavity 520 through the cleaning supply path for a first predetermined time. After the first predetermined time, the sample supply path outputs cleaning water to the sample preparation module 400 for a second predetermined time, so as to clean the internal flow channel of the sample outlet head 482;

[0101] The cleaning supply path empties the cleaning water in the liquid storage cavity 520 after the second predetermined time.

[0102] In the embodiment of the present application, by adopting the above tritium monitoring method, after the sample preparation is completed, the inside of the liquid storage cavity 520 is comprehensively cleaned, and at the same time, the internal flow channel of the sample preparation module 400 is cleaned through the sample supply path, which can effectively ensure that the next sample preparation cycle is not contaminated by the sample water of the previous sample preparation cycle, thereby improving the sample preparation accuracy and the reliability of the detection result.

[0103] In a preferred embodiment, before outputting a predetermined dose of scintillation liquid and sample water to the sample preparation module 400 through the scintillation liquid supply path and the sample supply path respectively, it further includes:

[0104] Circulate sample water in the liquid storage cavity 520 through the sample supply path and the cleaning supply path for a third predetermined time.

[0105] Specifically, input sample water into the liquid storage cavity 520 through the sample supply path, and at the same time discharge the sample water in the liquid storage cavity 520 through the cleaning supply path for the third predetermined time.

[0106] It is understandable that circulating the sample water in the liquid storage chamber 520 before performing sample preparation can ensure that the sampling result is more representative.

[0107] In a preferred embodiment, circulating the sample water in the liquid storage chamber 520 through the sample supply path and the cleaning supply path for a third predetermined time specifically is as follows:

[0108] The first liquid inlet end of the liquid inlet solenoid valve 531 is opened, the sampling pipeline 540 inputs the sample water into the liquid storage chamber 520 through the liquid storage pipeline 522, the first liquid inlet end of the liquid outlet solenoid valve 526 is closed, and the second liquid inlet end is opened. The sample water in the liquid storage chamber 520 is discharged through the overflow pipeline 523 and the sample discharge pipeline 550.

[0109] In a preferred embodiment, the first predetermined time, the second predetermined time, and the third predetermined time are specifically set to five minutes.

[0110] It is understandable that the setting forms of the first predetermined time, the second predetermined time, and the third predetermined time are not limited to the above one, as long as the complete inflow and outflow of the liquid in the liquid storage chamber 520 can be ensured, which will not be elaborated here.

[0111] In a preferred embodiment, outputting a predetermined dose of scintillation liquid and sample water to the sample preparation module 400 specifically is as follows:

[0112] The sampling three-way solenoid valve 590 is opened, the sampling metering plunger pump 591 extracts a predetermined dose of sample water and outputs it through the second distribution pipeline 592, the sample preparation arm 481, and the sample outlet head 482 into the sampling bottle at the positioning component 483. The liquid distribution three-way solenoid valve 570 is opened, the liquid distribution metering plunger pump 573 extracts a predetermined dose of scintillation liquid and outputs it through the second liquid distribution channel 571, the sample preparation arm 481, and the sample outlet head 482 into the sampling bottle at the positioning component 483.

[0113] In a preferred embodiment, the dose of the scintillation liquid output to the sample preparation module 400 is 12 ml, and the dose of the sample water is 8 ml.

[0114] In a preferred embodiment, emptying the sample water in the liquid storage chamber 520 through the cleaning supply path specifically is as follows:

[0115] The first liquid inlet end of the liquid outlet solenoid valve 526 is opened, and the second liquid inlet end is closed. The sample water in the liquid storage chamber 520 is discharged through the bottom discharge pipeline 521 and the sample discharge pipeline 550.

[0116] In a preferred embodiment, circulating the cleaning water in the liquid storage chamber 520 through the cleaning supply path for a first predetermined time specifically is as follows:

[0117] The second liquid inlet end of the liquid inlet electro-ball valve 531 is opened, and the cleaning pipeline 530 inputs clean water into the liquid storage cavity 520 through the liquid storage pipeline 522;

[0118] The first liquid inlet end of the liquid outlet electro-ball valve 526 is closed and the second liquid inlet end is opened, and the clean water in the liquid storage cavity 520 is discharged through the overflow pipeline 523 and the sample discharge pipeline 550.

[0119] In a preferred embodiment, the sample supply path outputs clean water for a second predetermined time to the sample dispensing module 400 after a first predetermined time, specifically:

[0120] The sampling three-way solenoid valve 590 is opened, and the sampling metering plunger pump 591 outputs the clean water in the liquid storage cavity 520 to the fountain cleaning pool 490 through the second distribution pipeline 592, the sample dispensing arm 481, and the sample outlet head 482.

[0121] In a preferred embodiment, before the clean water supply path empties the clean water in the liquid storage cavity 520 after a second predetermined time, it further includes:

[0122] The sample dispensing arm 481 drives the sample outlet head 482 to insert into the fountain cleaning pool 490;

[0123] The clean water supply path circulates clean water to the fountain cleaning pool 490 for a second predetermined time after a first predetermined time to clean the outer surface of the sample outlet head 482.

[0124] In a preferred embodiment, the clean water supply path circulates clean water to the fountain cleaning pool 490 for a second predetermined time after a first predetermined time, specifically:

[0125] The rotary pump 580 is opened and outputs the clean water in the liquid storage cavity 520 to the fountain cleaning pool 490. At the same time, the diaphragm pump 560 is opened to discharge the clean water in the fountain cleaning pool 490 through the waste liquid discharge pipe 562 and the sample discharge pipeline 550.

[0126] In a preferred embodiment, the clean water supply path empties the clean water in the liquid storage cavity 520 after a second predetermined time, specifically:

[0127] The first liquid inlet end of the liquid outlet electro-ball valve 526 is opened and the second liquid inlet end is closed, and the clean water in the liquid storage cavity 520 is discharged through the bottom discharge pipeline 521 and the sample discharge pipeline 550.

[0128] It should be noted that in this text, the terms "including", "comprising", or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device that includes a series of elements not only includes those elements but also other elements not explicitly listed, or elements that are inherent to such a process, method, article, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article, or device that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0129] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A tritium monitoring device, characterized in that, It includes a working frame, a scintillation spectrometer, a sample preparation module, and a sample supply module arranged on the working frame; The scintillation spectrometer includes a shielding layer, a monitoring component arranged inside the shielding layer, a detection channel penetrating through the inside of the shielding layer, and a sample lifting device capable of driving a sampling bottle to move inside the detection channel; The sample preparation module includes a to-be-inspected station, a completed-inspection station, a sample preparation component, a clamping component capable of moving in a spatial coordinate system, and a detection port communicated with the end of the detection channel far from the shielding layer; The sample preparation component includes a positioning component fixedly arranged on the working frame, a sample preparation arm communicated with the sample supply module, and a sample outlet head. The positioning component is used for positioning the sampling bottle. The sample outlet head is fixedly arranged on the sample preparation arm. The sample supply module can output sample water and scintillation liquid to the sampling bottle at the position of the positioning component through the sample preparation arm and the sample outlet head; Among them, the clamping component is used for clamping the sampling bottle and can drive the sampling bottle to transfer between the to-be-inspected station, the completed-inspection station, the positioning component, and the detection port. The sampling bottle can enter the inside of the shielding layer through the detection port and the detection channel. There is a monitoring station in the detection channel. The monitoring component can detect the sampling bottle at the position of the monitoring station. The sample lifting device can move the sampled bottle after detection to the opening position of the detection port.

2. The tritium monitoring device according to claim 1, wherein The sample preparation module further includes an X-direction driving component fixedly arranged on the working frame, a Y-direction driving component fixedly arranged on the moving end of the X-direction driving component, and a Z-direction driving component fixedly arranged on the moving end of the Y-direction driving component; Among them, the clamping component is fixedly arranged on the moving end of the Z-direction driving component.

3. A tritium monitoring device according to claim 1 or 2, characterized in that, The sample preparation module further includes a gushing cleaning pool. The sample preparation arm can drive the sample outlet head to transfer between the positioning component and the gushing cleaning pool, and can drive the sample outlet head to insert into the cleaning water in the gushing cleaning pool; Among them, the sample supply module is communicated with the gushing cleaning pool and can directly output cleaning water into the gushing cleaning pool, and can also output cleaning water into the gushing cleaning pool through the sample preparation arm and the sample outlet head.

4. A tritium monitoring device according to claim 1, characterized in that, The scintillation spectrometer further includes a light-shielding module for shielding light in the detection channel, an electrostatic elimination device for eliminating static electricity of the sampling bottle, and a position detection unit for positioning the sampling bottle in the detection channel.

5. The tritium monitoring device according to claim 4, characterized in that, The scintillation spectrometer further includes a refrigeration module for dissipating heat of the monitoring component; Among them, the refrigeration module is communicated with the sample supply module, and the cooling water of the refrigeration module can be discharged through the sample supply module.

6. A tritium monitoring device according to claim 1 or 4 or 5, characterized in that, The monitoring component includes two photomultiplier tubes symmetrically arranged about the monitoring station, a voltage divider respectively electrically connected to the two photomultiplier tubes, and a preamplifier respectively electrically connected to the two voltage dividers; Among them, the monitoring component further includes a high-voltage power supply for outputting high voltage to the two photomultiplier tubes and a low-voltage power supply for outputting low voltage to the two preamplifiers.

7. A tritium monitoring device according to claim 1 or 4, characterized in that, An external electrical interface coupled to the scintillation spectrometer is also fixedly arranged on the working frame.

8. A tritium monitoring device according to claim 1, characterized in that, An electrical module is also fixedly arranged on the working frame.

9. The tritium monitoring device according to claim 8, characterized in that, The electrical module includes an interaction screen fixedly arranged on the outer surface of the working frame, and a power supply module, a control module, and a terminal block connected to the interaction screen.

10. A tritium monitoring device according to claim 1 or 8 or 9, characterized in that, A first cavity, a second cavity, a third cavity and a fourth cavity which can be opened and closed are arranged in the working framework; Wherein, the scintillation spectrometer is arranged in the first cavity, the sample preparation module is arranged in the third cavity, the sample supply module is arranged in the fourth cavity, and the second cavity is used for installing the electrical module.

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