Tritium monitoring device and method

Abstract

The invention discloses a tritium monitoring device and method.The tritium monitoring method comprises the steps that a scintillation liquid supply channel and a sample supply channel output a preset dosage of scintillation liquid and sample water to a sample distribution module respectively, so that sample distribution of sampling bottles at the corresponding positions of a positioning assembly is achieved. According to the tritium monitoring device and method, the scintillation liquid and the sample water are output to the sample preparation module through the scintillation liquid supply channel and the sample supply channel respectively, so that automatic sample preparation of the sampling bottle is achieved, the two independent liquid supply channels can guarantee the accuracy of sample preparation, meanwhile, the clean supply channel communicated with the liquid storage cavity is further arranged, and the accuracy of sample preparation is improved. The liquid storage cavity can be self-cleaned before and after single detection, so that the risk of cross contamination during sample matching of a plurality of sampling bottles is eliminated, and the reliability of a detection result is further improved.

Description

Technical Field

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

[0002] During the operation of a pressurized water reactor nuclear power plant, a breakage accident may occur in the reactor coolant pipe, resulting in the leakage of nuclear fission products (including radioactive substances such as aerosols, iodine isotopes, and inert gases) through the steam generator and auxiliary 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 be suspended in the air of the operation area for a long time, and after entering the human body through the respiratory system, they will cause significant internal irradiation hazards. In addition, the liquid and gaseous products generated during the nuclear fuel cycle and waste treatment processes also have radioactive risks, and tritium needs 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 is easily combined with hydroxyl groups to form tritiated water vapor, which enters the ecosystem through the water cycle system, significantly increasing the risk of human radiation exposure. Current regulations require strict continuous monitoring of the tritium activity concentration in the liquid effluents of nuclear facilities. When the monitored value exceeds the preset threshold, the alarm system needs to be triggered immediately. The current mainstream online tritium monitoring equipment adopts liquid scintillation spectrometer technology. Although this technology has advantages such as high detection efficiency, sensitivity to low-energy β particles, and single-photon counting ability, there are still defects in practical applications.

[0004] Existing technical solutions usually require off-line sampling and analysis: after the 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, purification, quantitative mixing of the 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 many manual operation links; (2) The 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 and method with strong safety and high monitoring accuracy.

[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, including a sample preparation module and a sample supply module;

[0008] The sample preparation module includes a sample preparation arm fixedly arranged on the working frame, a positioning component for positioning the sampling bottle, and a sample outlet head fixedly arranged on the sample preparation arm;

[0009] The sample supply module includes a scintillation fluid chamber, a liquid storage chamber, a scintillation fluid supply passage communicated with the scintillation fluid chamber, a cleaning supply passage communicated with the liquid storage chamber, and a sample supply passage;

[0010] Wherein, the scintillation fluid supply passage is communicated with the sample preparation module and can output the scintillation fluid through the sample outlet head, the sample supply passage is communicated with the sample preparation module and can output cleaning water or sample water through the sample outlet head, and the cleaning supply passage is used for inputting and discharging the cleaning water in the liquid storage chamber and discharging the sample water in the liquid storage chamber.

[0011] Further defined, in the above-mentioned tritium monitoring device, wherein, the scintillation fluid supply passage includes a dispensing three-way solenoid valve, a first dispensing channel is communicated between the liquid inlet end of the dispensing three-way solenoid valve and the scintillation fluid chamber, the first liquid outlet end of the dispensing three-way solenoid valve is connected with a dispensing metering piston pump, and a second dispensing channel is communicated between the second liquid outlet end and the sample preparation arm;

[0012] Wherein, when the dispensing three-way solenoid valve is in the open state, the dispensing metering piston pump can output the scintillation fluid in the scintillation fluid chamber to the sample preparation module through the first dispensing channel and the second dispensing channel.

[0013] Further defined, in the above-mentioned tritium monitoring device, wherein, the sample supply passage includes an inlet solenoid valve and a sampling three-way solenoid valve;

[0014] A sampling pipeline is connected to the first liquid inlet end of the inlet solenoid valve, and a liquid storage pipeline is communicated between the liquid outlet end and the liquid storage chamber;

[0015] A first distribution pipeline is communicated between the liquid inlet end of the sampling three-way solenoid valve and the liquid storage chamber, the first liquid outlet end of the sampling three-way solenoid valve is connected with a sampling metering piston pump, and a second distribution pipeline is communicated between the second liquid outlet end and the sample preparation arm;

[0016] Wherein, when the inlet solenoid valve is in the open state, the sampling pipeline can input the sample water into the liquid storage chamber through the liquid storage pipeline; when the sampling three-way solenoid valve is in the open state, the sampling metering piston pump can output the sample water in the liquid storage chamber to the sample preparation module through the first distribution pipeline and the second distribution pipeline.

[0017] Further defined, in the above-mentioned tritium monitoring device, wherein, the cleaning supply passage includes an outlet solenoid valve and a cleaning pipeline connected to the second liquid inlet end of the inlet solenoid valve;

[0018] A sample discharge pipeline is connected to the liquid discharge end of the liquid discharge electric ball valve. A bottom discharge pipeline is connected between the first liquid inlet end of the liquid discharge electric ball valve and the bottom of the liquid storage cavity, and an overflow pipeline is connected between the second liquid inlet end of the liquid discharge electric ball valve and the top of the liquid storage cavity;

[0019] Among them, when the second liquid inlet end of the liquid inlet electric ball valve is in the open state, the cleaning pipeline can input clean water into the liquid storage cavity through the liquid storage pipeline; when the first liquid inlet end of the liquid discharge electric ball valve is in the open state, the clean water or sample water in the liquid storage cavity can be discharged through the bottom discharge pipeline and the sample discharge pipeline; when the second liquid inlet end of the liquid discharge electric ball valve is in the open state, the clean water or sample water in the liquid storage cavity can be discharged through the overflow pipeline and the sample discharge pipeline.

[0020] Further defined, in a tritium monitoring device as described above, the sample preparation module further includes a gushing cleaning pool communicated with the sample supply module. The sample preparation arm can drive the sampling head to transfer between the positioning component and the gushing cleaning pool, and can drive the sampling head to insert into the clean water in the gushing cleaning pool;

[0021] The cleaning supply path includes a diaphragm pump and a rotary pump. A waste liquid inlet pipe is connected between the liquid inlet end of the diaphragm pump and the bottom of the gushing cleaning pool, and the liquid outlet end is communicated with the sample discharge pipeline. An external cleaning pipeline is connected between the liquid inlet end of the rotary pump and the liquid storage cavity, and a gushing inlet pipeline is connected between the liquid outlet end and the gushing cleaning pool;

[0022] Among them, a waste liquid one-way valve is provided on the waste liquid discharge pipe, and the conduction direction of the waste liquid one-way valve is from the diaphragm pump to the sample discharge pipeline side;

[0023] The rotary pump can output the clean water in the liquid storage cavity to the gushing cleaning pool through the gushing inlet pipeline, and the diaphragm pump can discharge the clean water in the gushing cleaning pool through the waste liquid discharge pipe and the sample discharge pipeline.

[0024] This application also provides a tritium monitoring method for the tritium monitoring device described in any one of the above, including:

[0025] Output a predetermined dose of scintillation liquid and sample water to the sample preparation module through the scintillation liquid supply path and the sample supply path respectively, so as to realize sample preparation of the sampling bottle at the corresponding position of the positioning component;

[0026] After sample preparation is completed, empty the sample water in the liquid storage cavity through the cleaning supply path;

[0027] Circulate clean water in the liquid storage cavity through the cleaning supply path for a first predetermined time, and the sample supply path outputs clean water to the sample preparation module for a second predetermined time after the first predetermined time, so as to clean the internal flow path of the sampling head;

[0028] The cleaning supply path empties the clean water in the liquid storage cavity after the second predetermined time.

[0029] Further defined, in the above tritium monitoring method, before outputting a predetermined dose of scintillation fluid and sample water to the sample preparation module, it further includes:

[0030] Circulate the sample water through the sample supply path and the cleaning supply path to the liquid storage cavity for a third predetermined time.

[0031] Further defined, in the above tritium monitoring method, specifically, circulating the sample water through the sample supply path and the cleaning supply path to the liquid storage cavity for a third predetermined time is as follows:

[0032] Open the first liquid inlet end of the inlet solenoid valve, and the sampling pipeline inputs the sample water into the liquid storage cavity through the liquid storage pipeline;

[0033] Close the first liquid inlet end of the outlet solenoid valve and open the second liquid inlet end, and the sample water in the liquid storage cavity is discharged through the overflow pipeline and the sample discharge pipeline.

[0034] Further defined, in the above tritium monitoring method, specifically, circulating the cleaning water through the sample supply path and the cleaning supply path to the liquid storage cavity for a first predetermined time is as follows:

[0035] Open the second liquid inlet end of the inlet solenoid valve, and the cleaning pipeline inputs the cleaning water into the liquid storage cavity through the liquid storage pipeline;

[0036] Close the first liquid inlet end of the outlet solenoid valve and open the second liquid inlet end, and the cleaning water in the liquid storage cavity is discharged through the overflow pipeline and the sample discharge pipeline.

[0037] Further defined, in the above tritium monitoring method, before emptying the cleaning water in the liquid storage cavity after a second predetermined time, it further includes:

[0038] The sample preparation arm drives the sample extraction head to insert into the gushing cleaning pool;

[0039] The cleaning supply path circulates the cleaning water through the gushing cleaning pool for a second predetermined time after a first predetermined time to clean the outer surface of the sample extraction head.

[0040] The present invention has at least the following beneficial effects:

[0041] 1. Output the scintillation fluid and the sample water to the sample preparation module through the scintillation fluid supply path and the sample supply path respectively, so as to realize the automatic sample preparation of the sampling bottle. The two independent liquid supply paths can ensure the accuracy of sample preparation. At the same time, a cleaning supply path connected to the liquid storage cavity is also provided, which can self-clean the liquid storage cavity 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;

[0042] 2. After the sample preparation is completed, thoroughly clean the inside of the liquid storage cavity and, at the same time, clean the internal flow channels of the sample preparation module 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 results. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic structural diagram of the tritium monitoring device according to an embodiment of the present application;

[0044] Figure 2 It is a schematic structural diagram of the tritium monitoring device according to an embodiment of the present application;

[0045] Figure 3 It is a schematic internal structural diagram of the tritium monitoring device according to an embodiment of the present application;

[0046] Figure 4 It is a schematic structural diagram of the "sample preparation module 400" part of the tritium monitoring device according to an embodiment of the present application;

[0047] Figure 5 It is an enlarged schematic structural diagram of the "sample preparation arm 481" part of the tritium monitoring device according to an embodiment of the present application;

[0048] Figure 6 It is a schematic structural diagram of the tritium monitoring device according to an embodiment of the present application;

[0049] Figure 7 It is a schematic structural diagram of the "scintillation spectrometer 200" part of the tritium monitoring device according to an embodiment of the present application;

[0050] Figure 8 It is a schematic structural diagram of the "sample supply module 500" part of the tritium monitoring device according to an embodiment of the present application;

[0051] Figure 9 It is a monitoring principle diagram of the "sample supply module 200" of the tritium monitoring device according to an embodiment of the present application.

[0052] REFERENCE SIGNS

[0053] 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 preparation channel - 511, liquid storage cavity - 520, bottom drainage 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 preparation three-way solenoid valve - 570, second liquid preparation channel - 571, liquid preparation metering piston pump - 573, rotary pump - 580, gushing liquid inlet pipeline - 581, sampling three-way solenoid valve - 590, sampling metering piston pump - 591, second distribution pipeline - 592, external electrical interface - 600. Detailed implementation manners

[0054] 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.

[0055] 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 here, 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.

[0056] The following will combine the accompanying drawings to detail the tritium monitoring device and method provided by the embodiments of this application through specific embodiments and their application scenarios.

[0057] Embodiment 1

[0058] 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.

[0059] The scintillation spectrometer 200 includes a shielding layer 210, a monitoring component provided inside 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 inside 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 spatial coordinate system, and a detection port 470 communicating with one end of the detection channel 220 away from the shielding layer 210.

[0060] 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.

[0061] 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. There is a monitoring station 221 inside 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 after detection to the opening position of the detection port 470.

[0062] 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 fluid 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 with the sample dispensing completed at the position of the positioning assembly 483 and moves the sampling bottle to the corresponding position of the detection port 470. The sampling bottle after the sample dispensing passes through the detection port 470 and the detection channel 220 into the interior of the shielding layer 210 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 after the detection at the position of the detection port 470 to the completed inspection station 460, thus completing a complete automatic sample dispensing and detection process.

[0063] In the embodiment of the present application, by adopting 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 the sample addition can automatically move to the monitoring station 221 of the scintillation spectrometer 200 for detection, and the sampling bottle after the detection can be automatically classified through the clamping assembly 440. The whole monitoring process does not require manual intervention, has a high degree of intelligence, and effectively avoids the radioactive safety hazards caused by manual operation.

[0064] 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.

[0065] Among them, the clamping assembly 440 is fixedly arranged on the moving end of the Z-direction driving assembly 430.

[0066] 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.

[0067] 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.

[0068] 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 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.

[0069] 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 outlet head 482.

[0070] In the embodiment of the present application, by adopting the above-mentioned tritium monitoring device, when the sample outlet head 482 completes a sample preparation cycle, the sample preparation arm 481 drives the sample outlet 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 outlet 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 outlet head 482, and then completes the internal cleaning of the sample outlet 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 component 483 without causing pollution to subsequent sample preparation, ensuring the accuracy of subsequent sample preparation and detection.

[0071] In a preferred embodiment, as Figure 6 、 Figure 7 shown, the scintillation spectrometer 200 further includes a light shielding module 230 for shielding light in the detection channel 220, a static 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.

[0072] 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.

[0073] It can be understood that the photomultiplier tube 260 can receive the fluorescent photons emitted by the sampling bottle at the monitoring station 221, convert them into photoelectrons through the photocathode, and its internal dynodes (multiplier electrodes) perform multi-stage multiplication on the electrons 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.

[0074] 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.

[0075] In a preferred embodiment, as Figure 6 、 Figure 7 shown, the scintillation spectrometer 200 further includes a refrigeration module 290 for dissipating heat from the monitoring components.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] Embodiment 2

[0084] As Figures 1 to 9 shown, the 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.

[0085] 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.

[0086] The sample supply module 500 includes a scintillation liquid cavity 510, a liquid storage cavity 520, and further includes a scintillation liquid supply passage communicating with the scintillation liquid cavity 510, a cleaning supply passage and a sample supply passage communicating with the liquid storage cavity 520.

[0087] 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 cavity 520 and the discharge of sample water in the liquid storage cavity 520.

[0088] 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 the 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 cavity 520 is also provided, which can self-clean the liquid storage cavity 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.

[0089] In a preferred embodiment, as Figure 6 、 Figure 8As shown, the scintillation fluid supply path includes a dispensing three-way solenoid valve 570. A first dispensing channel 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 liquid outlet end is provided with a second dispensing channel 571 in communication with the sample dispensing arm 481.

[0090] 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 channel 511 and the second dispensing channel 571.

[0091] In a preferred embodiment, as Figure 6 、 Figure 8 shown, the sample supply path includes a liquid inlet solenoid valve 531 and a sampling three-way solenoid valve 590.

[0092] 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.

[0093] 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 liquid outlet end is provided with a second distribution pipeline 592 in communication with the sample dispensing arm 481.

[0094] 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.

[0095] 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.

[0096] In a preferred embodiment, as Figure 6 、 Figure 8 shown, the cleaning supply path 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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, and 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] Wherein, 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.

[0106] 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.

[0107] 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.

[0108] Among them, the liquid outlet end of the refrigeration module 290 is connected with a cooling pipeline 291 communicated with the waste liquid drain pipe 562. A cooling check valve 292 is arranged on the cooling pipeline 291, and the conduction direction of the cooling check valve 292 is from the refrigeration module 290 to the waste liquid drain pipe 562 side.

[0109] Embodiment 3

[0110] The embodiment of the present application provides a tritium monitoring method for the tritium monitoring device in the above embodiment, including:

[0111] Obtain a detection execution instruction;

[0112] 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;

[0113] After the sample preparation is completed, empty the sample water in the liquid storage cavity 520 through the cleaning supply path;

[0114] Circulate cleaning water in the liquid storage cavity 520 through the cleaning supply path for a first predetermined time, and the sample supply path outputs cleaning water to the sample preparation module 400 for a second predetermined time after the first predetermined time, so as to clean the internal flow channel of the sample outlet head 482;

[0115] The cleaning supply path empties the cleaning water in the liquid storage cavity 520 after the second predetermined time.

[0116] 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.

[0117] 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:

[0118] Circulate sample water in the liquid storage cavity 520 through the sample supply path and the cleaning supply path for a third predetermined time.

[0119] Specifically, sample water is input into the liquid storage cavity 520 through the sample supply path, and at the same time, the sample water in the liquid storage cavity 520 is discharged through the cleaning supply path, lasting for the third predetermined time.

[0120] 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.

[0121] In a preferred embodiment, circulating the sample water in the liquid storage chamber 520 through the sample supply passage and the cleaning supply passage for a third predetermined time is specifically as follows:

[0122] 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.

[0123] In a preferred embodiment, the first predetermined time, the second predetermined time, and the third predetermined time are specifically set to five minutes.

[0124] 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.

[0125] In a preferred embodiment, outputting a predetermined dose of scintillation liquid and sample water to the sample preparation module 400 is specifically as follows:

[0126] 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 to the sampling bottle at the positioning component 483 through the second distribution pipeline 592, the sample preparation arm 481, and the sample outlet head 482. The liquid distribution three-way solenoid valve 570 is opened, and the liquid distribution metering plunger pump 573 extracts a predetermined dose of scintillation liquid and outputs it to the sampling bottle at the positioning component 483 through the second liquid distribution channel 571, the sample preparation arm 481, and the sample outlet head 482.

[0127] 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.

[0128] In a preferred embodiment, emptying the sample water in the liquid storage chamber 520 through the cleaning supply passage is specifically as follows:

[0129] 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.

[0130] In a preferred embodiment, circulating the cleaning water in the liquid storage chamber 520 through the cleaning supply passage for a first predetermined time is specifically as follows:

[0131] The second liquid inlet end of the liquid inlet solenoid valve 531 is opened, and the cleaning pipeline 530 inputs clean water into the liquid storage cavity 520 through the liquid storage pipeline 522;

[0132] The first liquid inlet end of the liquid outlet solenoid 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.

[0133] In a preferred embodiment, the sample supply path outputs clean water for a second predetermined time to the sample preparation module 400 after a first predetermined time, specifically:

[0134] 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 Yongquan cleaning pool 490 through the second distribution pipeline 592, the sample preparation arm 481, and the sample outlet head 482.

[0135] In a preferred embodiment, before the clean water supply path empties the clean water in the liquid storage cavity 520 after the second predetermined time, it further includes:

[0136] The sample preparation arm 481 drives the sample outlet head 482 to insert into the Yongquan cleaning pool 490;

[0137] The clean water supply path circulates clean water to the Yongquan cleaning pool 490 for a second predetermined time after the first predetermined time to clean the outer surface of the sample outlet head 482.

[0138] In a preferred embodiment, the clean water supply path circulates clean water to the Yongquan cleaning pool 490 for a second predetermined time after the first predetermined time, specifically:

[0139] The rotary pump 580 is opened and outputs the clean water in the liquid storage cavity 520 to the Yongquan cleaning pool 490. At the same time, the diaphragm pump 560 is opened to discharge the clean water in the Yongquan cleaning pool 490 through the waste liquid discharge pipe 562 and the sample discharge pipeline 550.

[0140] In a preferred embodiment, the clean water supply path empties the clean water in the liquid storage cavity 520 after the second predetermined time, specifically:

[0141] The first liquid inlet end of the liquid outlet solenoid 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.

[0142] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but 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 a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0143] 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 rather than 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 fall within the protection scope of the present application.

Claims

1. A tritium monitoring device, characterized in that, It includes a sample preparation module and a sample supply module; The sample preparation module includes a sample preparation arm fixedly arranged on the working frame, a positioning component for positioning the sampling bottle, and a sample outlet head fixedly arranged on the sample preparation arm; The sample supply module includes a scintillation fluid chamber, a liquid storage chamber, a scintillation fluid supply passage communicated with the scintillation fluid chamber, a cleaning supply passage communicated with the liquid storage chamber, and a sample supply passage; Among them, the scintillation fluid supply passage is communicated with the sample preparation module and can output scintillation fluid through the sample outlet head. The sample supply passage is communicated with the sample preparation module and can output cleaning water or sample water through the sample outlet head. The cleaning supply passage is used for inputting and discharging cleaning water in the liquid storage chamber, and discharging sample water in the liquid storage chamber.

2. The tritium monitoring device according to claim 1, characterized in that, The scintillation fluid supply passage includes a liquid distribution three-way solenoid valve. A first liquid distribution channel is communicated between the liquid inlet end of the liquid distribution three-way solenoid valve and the scintillation fluid chamber. The first liquid outlet end of the liquid distribution three-way solenoid valve is connected with a liquid distribution metering piston pump, and a second liquid distribution channel is communicated between the second liquid outlet end and the sample preparation arm; Among them, when the liquid distribution three-way solenoid valve is in the open state, the liquid distribution metering piston pump can output the scintillation fluid in the scintillation fluid chamber to the sample preparation module through the first liquid distribution channel and the second liquid distribution channel.

3. A tritium monitoring device according to claim 1, characterized in that, The sample supply passage includes an inlet electric ball valve and a sampling three-way solenoid valve; A sampling pipeline is connected to the first inlet end of the inlet electric ball valve, and a liquid storage pipeline is communicated between the outlet end and the liquid storage chamber; A first distribution pipeline is communicated between the liquid inlet end of the sampling three-way solenoid valve and the liquid storage chamber. The first liquid outlet end of the sampling three-way solenoid valve is connected with a sampling metering piston pump, and a second distribution pipeline is communicated between the second liquid outlet end and the sample preparation arm; Among them, when the inlet electric ball valve is in the open state, the sampling pipeline can input sample water into the liquid storage chamber through the liquid storage pipeline. When the sampling three-way solenoid valve is in the open state, the sampling metering piston pump can output the sample water in the liquid storage chamber to the sample preparation module through the first distribution pipeline and the second distribution pipeline.

4. A tritium monitoring device according to claim 3, characterized in that, The cleaning supply passage includes an outlet electric ball valve and a cleaning pipeline connected to the second inlet end of the inlet electric ball valve; A sample discharge pipeline is connected to the outlet end of the outlet electric ball valve. A bottom discharge pipeline is connected between the first inlet end of the outlet electric ball valve and the bottom of the liquid storage chamber, and an overflow pipeline is connected between the second inlet end and the top of the liquid storage chamber; Among them, when the second inlet end of the inlet electric ball valve is in the open state, the cleaning pipeline can input cleaning water into the liquid storage chamber through the liquid storage pipeline. When the first inlet end of the outlet electric ball valve is in the open state, the cleaning water or sample water in the liquid storage chamber can be discharged through the bottom discharge pipeline and the sample discharge pipeline. When the second inlet end of the outlet electric ball valve is in the open state, the cleaning water or sample water in the liquid storage chamber can be discharged through the overflow pipeline and the sample discharge pipeline.

5. A tritium monitoring device according to claim 1 or 4, characterized in that, The sample preparation module further includes a gushing cleaning pool communicated with the sample supply module. 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; The cleaning supply path includes a diaphragm pump and a rotary pump. A waste liquid inlet pipe is connected between the liquid inlet end of the diaphragm pump and the bottom of the gushing cleaning pool, and the liquid outlet end is communicated with the sample discharging pipeline. An external cleaning pipeline is connected between the liquid inlet end of the rotary pump and the liquid storage cavity, and a gushing liquid inlet pipeline is connected between the liquid outlet end and the gushing cleaning pool; Wherein, a waste liquid one-way valve is provided on the waste liquid discharge pipe, and the conduction direction of the waste liquid one-way valve is from the diaphragm pump to the sample discharging pipeline side; The rotary pump can output the cleaning water in the liquid storage cavity to the gushing cleaning pool through the gushing liquid inlet pipeline, and the diaphragm pump can discharge the cleaning water in the gushing cleaning pool through the waste liquid discharge pipe and the sample discharging pipeline.

6. A tritium monitoring method, characterized in that, The tritium monitoring device for any one of the above claims 1 to 5 includes: Outputting a predetermined dose of scintillation liquid and sample water to the sample preparation module through the scintillation liquid supply path and the sample supply path respectively to realize the sample preparation of the sampling bottle at the corresponding position of the positioning component; After the sample preparation is completed, the sample water in the liquid storage cavity is emptied through the cleaning supply path; Circulating the cleaning water in the liquid storage cavity for a first predetermined time through the cleaning supply path, and the sample supply path outputs the cleaning water to the sample preparation module for a second predetermined time after the first predetermined time to clean the internal flow path of the sample outlet head; The cleaning supply path empties the cleaning water in the liquid storage cavity after the second predetermined time.

7. A tritium monitoring method according to claim 6, characterized in that Before outputting a predetermined dose of scintillation liquid and sample water to the sample preparation module, it further includes: Circulating the sample water in the liquid storage cavity for a third predetermined time through the sample supply path and the cleaning supply path.

8. A tritium monitoring method according to claim 7, characterized in that, Specifically, circulating the sample water in the liquid storage cavity for a third predetermined time means: The first liquid inlet end of the inlet electric ball valve is opened, and the sampling pipeline inputs the sample water into the liquid storage cavity through the liquid storage pipeline; The first liquid inlet end of the outlet electric ball valve is closed and the second liquid inlet end is opened, and the sample water in the liquid storage cavity is discharged through the overflow pipeline and the sample discharging pipeline.

9. A tritium monitoring method according to claim 6, characterized in that, Specifically, circulating the cleaning water in the liquid storage cavity for a first predetermined time means: The second liquid inlet end of the inlet electric ball valve is opened, and the cleaning pipeline inputs the cleaning water into the liquid storage cavity through the liquid storage pipeline; The first liquid inlet end of the outlet electric ball valve is closed and the second liquid inlet end is opened, and the cleaning water in the liquid storage cavity is discharged through the overflow pipeline and the sample discharging pipeline.

10. A tritium monitoring method according to claim 6, characterized in that, Before emptying the cleaning water in the liquid storage cavity after the second predetermined time, it further includes: The sample preparation arm drives the sample outlet head to insert into the gushing cleaning pool; The cleaning supply path circulates the cleaning water in the gushing cleaning pool for a second predetermined time after the first predetermined time to clean the outer surface of the sample outlet head.

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