347 results about "Leak rate" patented technology

The invention discloses a vacuum sealing leakage rate prediction method and device, equipment and a medium. The method comprises the following steps: constructing a three-dimensional microstructure model of a flange sealing surface according to a processing mode of the flange sealing surface; based on the three-dimensional microstructure model, establishing leakage micro-channels between the sealed contact interfaces in different contact states, analyzing channel characteristics, and determining flow characteristics of leakage media in the leakage micro-channels in different contact states; constructing a first leakage rate prediction model represented by the microscopic characteristic parameters according to the working environment parameters and the physical attributes and flow characteristics of the leakage medium; and constructing a mapping relation between the macroscopic design parameters and the microscopic characteristic parameters through characteristic multi-scale coupling, and substituting the mapping relation into the first leakage rate prediction model to obtain a second leakage rate prediction model driven by the macroscopic design parameters so as to predict the vacuum sealing leakage rate. The method has the advantages of high precision, strong adaptability and good engineering practicability.

A water leakage monitoring method for a digital twinning system of a coal mine shaft comprises the steps that an RFID antenna and a Twinin-Tag sensor are installed on the wall of the shaft, a monitoring terminal is arranged on the ground, and an RFID reader is arranged at an outlet of the shaft; a shaft monitoring signal is collected in real time through a Twindow-Tag sensor, the shaft monitoring signal is read through an RFID reader, and then shaft monitoring data are obtained by analyzing and processing the shaft monitoring signal; collecting RSSI reading and phase data by using a short time window, and performing state identification by using a decision tree; carrying out coarse segmentation and fine segmentation on the leakage signal, and determining the location of a water leakage point in combination with a change point detection algorithm; and the leakage volume and the leakage rate are estimated. According to the method, the water leakage point can be accurately positioned, the volume and flow velocity information of the leaked water in the shaft can be obtained, so that a reliable basis is provided for subsequent maintenance decision making, and the method is suitable for long-term monitoring operation of the coal mine shaft.

The invention discloses a pneumatic joint sealing performance intelligent test method and system based on dynamic pressure spectrum and multi-parameter fusion, and belongs to the technical field of pneumatic element sealing detection. According to the method, a dynamic pressure spectrum simulating an actual working condition is applied to a tested joint, pressure, temperature and ultrasonic signals are synchronously acquired, environmental thermodynamic interference is eliminated by adopting a temperature real-time compensation algorithm, and pressure change purely caused by leakage is separated by deducting system baseline data; and finally, fusing double characteristic parameters of the pressure leakage rate and the ultrasonic energy, and comprehensively evaluating the sealing performance through an intelligent judgment model. The system comprises a gas circuit tool module, a multi-sensing module and a control processing module, can effectively solve the problems that a traditional static pressure maintaining method is greatly influenced by temperature, transient leakage cannot be detected and the like, has the advantages of being high in detection precision, high in anti-interference capability, capable of simulating real working conditions and the like, and remarkably improves the test reliability and efficiency.

The invention relates to the technical field of petrochemical equipment sealing, in particular to a flange sealing performance evaluation method based on bolt axial stress, which comprises the following steps: establishing a nonlinear stress relationship between a gasket and bolt axial force; establishing a relationship between the axial stress of the bolt and the sealing contact stress of the contact surface of the gasket under different working pressures; constructing a three-dimensional model of a real sealing surface; establishing a three-dimensional model of the sealing surface contact process; obtaining the change of a leakage gap between the contact surfaces under different contact stresses, and establishing a relation model of the leakage gap of the contact interface and the sealing contact stress; establishing a quantitative evaluation model among the sealing contact stress, the leakage clearance and the leakage rate; obtaining the contact stress under the actual working condition, and calculating whether the corresponding leakage rate meets the tightness judgment standard or not so as to judge the sealing state of the flange. The invention aims to solve the technical problem that the metal sealing performance of in-service flange connection cannot be quantitatively and online evaluated in the prior art.

The invention discloses a vacuum cavity pressure maintaining test and leak rate rapid estimation method and system, and the method comprises the steps: achieving the test preparation of multiple sections through a public metering manifold and a multi-way isolation valve, and building a section volume database; the pressure and temperature data are synchronously collected in a fixed sampling period by exhausting air to preset pressure and isolating a pump end; obtaining an equivalent pressure change rate through temperature normalization and deflation baseline deduction in combination with filtering and regression algorithms, and performing conversion to obtain a standardized leak rate; step-by-step detection is carried out on each functional section of the cavity through a segmented bipartite isolation strategy and volume correction, and rapid positioning of a suspicious leakage section is realized; through double-threshold determination of an early warning threshold and an unqualified threshold, a detection report is automatically generated and written into a historical database, and a detection-determination-maintenance closed loop is formed. The method can improve the precision of leak rate detection, and is suitable for vacuum coating equipment, semiconductor process equipment and industrial vacuum treatment devices.

The invention discloses a leakage rate prediction method for a sealing interface of a metal lens gasket of ultrahigh pressure equipment, and belongs to the technical field of leakage rate prediction. The method comprises the following steps: S1, establishing a coupling damage cycle elastic-plastic constitutive model of a metal lens pad material; s2, establishing an ultrahigh-pressure sealing structure finite element model, applying a cyclic load for simulation, and fitting to obtain an attenuation rule model of the contact stress of the metal lens gasket under the cyclic load; s3, establishing a single rough peak contact deformation finite element model, correlating the model with an actual sealing structure, and fitting to obtain a relational expression between the contact stress of the metal lens pad and the microcosmic rough peak deformation under the cyclic load; s4, establishing a leakage model of the microcosmic pore structure of the sealing interface, and combining the steps S2 and S3 to obtain a leakage rate prediction model of the sealing interface; and S5, predicting the leakage rate by using the prediction model. According to the prediction method, the leakage rate of the sealing interface of the metal lens gasket under the cyclic load working condition can be accurately predicted.

A method of quality testing an airflow path defined in a product is provided, the product including a plurality of component parts, each defining a portion of the airflow path, joined together to form the product, the method including steps of: pressurizing the airflow path to a predetermined pressure; measuring leakage from the pressurized airflow path for a predetermined period of time; determining a leakage rate over the predetermined period of time; and determining whether the leakage rate is greater than a permissible threshold leakage rate, the product being an aerosol-generating device or a heater assembly for an aerosol-generating device, and the method being performed at an elevated temperature compared to ambient temperature. A method of manufacturing a heater assembly for an aerosol-generating device is also provided.

A nuclear main pump double-cone sealing leakage detection method based on a bolt load and a sealing contact model relates to the technical field of double-cone sealing leakage detection.The method comprises the steps that firstly, the bolt load is substituted into a mapping model of the bolt load and gasket sealing surface contact pressure, and the sealing surface contact pressure is obtained; dividing calculation units for the sealing contact surface, and completing the construction of a gasket sealing rough contact surface model of a single calculation unit; a finite element simulation method is used for obtaining a sealing contact surface entity after compression deformation; the deformed sealing contact surface entity is subjected to micro fluid leakage calculation in Fluent fluid simulation software, and the leakage rate of a single calculation unit is obtained; finally, the leakage rate of the whole double-cone sealing structure is obtained according to division of the calculation units. By acquiring the king bolt load and the sealing contact model, tiny leakage detection of the double-cone sealing structure is achieved, and the method has the advantages of being high in accuracy, simple in test, high in environmental adaptability and the like.

The invention discloses a space cabin door system and a rapid leak rate detection method thereof, and belongs to the technical field of reliability and safety design of space cabin doors. The cabin door system comprises a sealed cabin door, a pressure point switch and a cabin door rapid leak detector, the end face of a door body of the sealed cabin door is sleeved with a sealing ring inner ring and a sealing ring outer ring, when the cabin door is closed, the two sealing rings make contact with the sealing face of the door frame in a pressed mode, and a sealed cavity is formed between the two sealing rings and the sealing face of the door frame. The pressure point switch is arranged on the door frame and detects whether the cabin door switch acts in place or not. And the cabin door rapid leak detector inflates the sealed cavity and performs leak rate test to obtain the sealing condition of the sealing ring. Through the application of the invention, the in-place action of the cabin door can be reliably detected, the sealing performance of the cabin door can be quickly given, and a quantitative basis is provided for reliably closing the cabin door.

The invention discloses a leakage rate detection device and method for gloves of a glove box, and the device comprises a detection cabin which is provided with a cavity and a glove installation part, and the glove installation part is located at one end of the cavity and is fixedly connected with the cavity; the glove mounting piece is provided with a hollow circular opening protruding part, and the glove to be detected, the protruding part and the cavity jointly form a space to be detected; the vacuum pump is used for extracting air in the to-be-detected space; the nitrogen source works cooperatively with the vacuum pump and is used for injecting nitrogen into the to-be-detected space so as to reduce the oxygen content of the to-be-detected space; and the oxygen adsorption circulating system further adsorbs and purifies oxygen in the cavity on the basis of collaborative oxygen removal of the vacuum pump and the nitrogen source so as to provide a low-oxygen environment. By means of the device, the glove leakage rate is calculated by comparing the oxygen concentration change of the standard glove and the to-be-detected glove, and by means of multi-stage parameter correction and multi-sealing design, the glove leakage rate is improved, and the reliability of the glove leakage rate is improved. The equipment background leakage rate is effectively reduced, and the reliability of a test result is improved.

The invention provides a sleeve testing device and a strength checking and correcting method, and relates to the technical field of offshore high temperature and high pressure, and the device comprises a temperature control system which is used for providing a steady-state high-temperature simulation environment and a transient high-temperature simulation environment for a sleeve sample; the loading system is used for applying axial, radial and internal loads to the casing sample; the monitoring system is used for monitoring a surface temperature field, inner wall strain and leakage of the casing sample; and the data processing and control unit is respectively connected with the temperature control system, the loading system and the monitoring system. The method adopts the device and comprises the following steps: selecting a casing sample, fixing a sensor and completing initial calibration; heating the whole casing pipe and keeping the temperature constant, and applying instantaneous thermal shock to a specific area; synchronously applying axial, radial and internal loads; cooperatively monitoring the temperature field, the strain and the leakage rate to form an associated database; and correcting the safety coefficient. The invention solves the problems of single test temperature and insufficient load coupling of the traditional casing, and is suitable for casing performance evaluation.

The invention provides a vacuum helium mass spectrum leak detection method and device for corrugated pipe products. The vacuum helium mass spectrum leak detection method comprises the following steps that S1, corrugated pipes are fixed through supporting rings; s2, the supporting ring and the supporting plate are assembled; s3, a first O-shaped ring is placed between the corrugated pipe and the upper cover for sealing, and the upper cover, the corrugated pipe and the supporting plate are fixed through studs; s4, the fixed corrugated pipe is placed on a base, a second O-shaped ring is placed between the base and an upper cover for sealing, and bolts are adopted for fixing; s5, the assembled corrugated pipe is vertically placed, a helium mass spectrometer leak detector is connected with a sampling inspection opening in the bottom, and the outside of the corrugated pipe is vacuumized; and S6, connecting the helium tank connected with the pressure reducing valve with a top helium filling port, and filling helium into the corrugated pipe for leak rate inspection. According to the invention, the corrugated pipe is ensured not to be stretched under the stamping condition and not to be distorted and deformed; the effectiveness of sealing between the corrugated pipe and the upper cover is ensured; the detection result is accurate and reliable.

According to the comparison test method for testing the sealing performance of the valve by using the water pressure and the air pressure, different leakage opening degrees are designed for the test valve under different water pressure test pressure working conditions of the test valve; a water pressure drop method sealing test device and an air pressure flow method sealing test device are respectively used for carrying out a comparison sealing test on the same leakage opening degree to obtain different leakage rates of the water and the air medium under respective test pressures under the leakage opening degree, and finally, the leakage rate conversion relation of the water and the air medium under different test pressures is analyzed and obtained. The device is used for finding out the leakage rate conversion relation of water and gas media under different test pressures, and solves the problems that the leakage rate detected by a gas pressure flow method cannot directly reflect the valve leakage condition and is lack of acceptance standards.

The invention belongs to the technical field of valve airtightness detection, and provides a vacuum valve airtightness detection method and device, and the method comprises the following steps: collecting event records of positive pressure-negative pressure bidirectional detection of a vacuum valve for many times from a historical detection database, and carrying out the clustering analysis of events with similar detection conditions, forming a plurality of event groups with similar detection conditions; the method comprises the following steps: acquiring detection conditions of real-time bidirectional detection events, acquiring a similar event group of the matched detection conditions as a target analysis group through a matching algorithm, screening out events with consistent detection sequences from the target analysis group, and respectively constructing a first detection sequence event set and a second detection sequence event set; and respectively performing deviation analysis on the detection leakage rate and the actual leakage rate in the first detection sequence event set and the second detection sequence event set to obtain a first leakage rate deviation sequence and a second leakage rate deviation sequence.

The invention discloses a simple leak detection method for a semiconductor device vacuum system, a semiconductor device is internally provided with a control system, and the vacuum system comprises a process gas pipeline, a vacuum cavity, an exhaust pipeline, a vacuum gauge, a pumping resistance valve, a vacuum pump, an MFC, a source bottle, a hand valve, a diaphragm valve, an ALD valve, an N2 pipeline and an O3 pipeline. And the control system is embedded with a logic control program and an algorithm for leak rate testing and performs control and data acquisition on each element of the vacuum system, and a leak rate testing result is displayed through a leak rate testing interface. The data of the vacuum gauge of the equipment is directly read through the control system, and the error of leak rate calculation is reduced.

The invention relates to the technical field of bearings, in particular to a comprehensive evaluation method and system for the sealing performance of a deep groove ball bearing. According to the method, the actual working state of the deep groove ball bearing is obtained through the dynamic contact half width and the contact stress, the health condition of a sealing part can be reflected more accurately, and the dynamic characteristics of the sealing change in the working process of the bearing can be captured in time by measuring the total contact pressure and the contact stress in real time; by monitoring the pressure driving leakage rate and the centrifugal effect leakage rate of the contact area of the sealing lip and the bearing ring, the sealing performance can be evaluated more directly and accurately, and by monitoring the dynamic oil film thickness and the medium pressure difference of the contact area in real time to obtain the leakage rate, the sealing state can be reflected more accurately. By comprehensively considering various factors such as the pressure driving leakage rate and the centrifugal effect leakage rate, a more comprehensive sealing efficiency index can be obtained, and the accuracy and reliability of sealing performance evaluation are improved.

The invention provides a method and system for detecting inner leakage of a positive pressure helium detection valve, and relates to the technical field of valve sealing performance detection.The method comprises the steps that test gas with rated working pressure is applied to a to-be-detected valve, the change of the internal pressure of the valve is monitored in real time under the rated working pressure, and positive pressure inner leakage pre-detection is conducted; if the pressure is kept stable, a judgment result of passing the pre-detection is obtained, and if the pressure fluctuation exceeds a set threshold value, the test is terminated and an alarm signal is sent out; and based on the judgment result of the pre-detection, in the process of continuously applying the test gas, controlling the temperature condition of the to-be-tested valve, repeatedly executing the positive pressure inner leakage test at different temperatures, and recording the basic leakage rate at each temperature point to obtain an initial dynamic sealing performance curve. According to the invention, accurate correction and multi-dimensional data fusion of valve leakage rate detection data can be realized, and the accuracy of inner leakage detection of the valve under a temperature alternating working condition is improved.

The invention relates to the technical field of radiation protection equipment, and provides a multi-scale self-adaptive fixing system for a lead plate, in the aspect of lead plate fixing, through a three-degree-of-freedom structure and a precise force control system of a shape memory alloy driving clamp, the clamping angle and force can be adjusted in a self-adaptive manner, the plastic deformation of the lead plate is effectively avoided, and the service life of the lead plate is prolonged. The problem that a traditional clamp is poor in fixing precision is solved. And due to the innovative structure of the modular quick connection assembly, the assembly and the disassembly are convenient, the seam leakage rate is greatly reduced, and the radiation protection performance is improved. In terms of environmental adaptation, the temperature and humidity cooperative control system can accurately adjust the temperature of the lead plate, and the self-repairing nano ceramic anti-corrosion coating can effectively isolate corrosion ions and automatically repair the coating. The intelligent monitoring and early warning system utilizes a multi-dimensional sensor, edge calculation and digital twinning technology to monitor the state of equipment in real time, quickly diagnose faults and perform graded early warning, so that the safe and stable operation of the system is guaranteed, and the reliability and the intelligent level of the equipment are greatly improved.

The invention relates to the technical field of valve air tightness detection, and discloses an automatic pressurization air tightness detection method and system for a high-pressure valve, and the method comprises the steps: determining the effective volume and background leakage rate of a test loop, completing the pre-debugging of a valve seat and a seal, supplying air to the test loop, building dual criteria, and when an isothermal steady-state condition is satisfied, carrying out the automatic pressurization air tightness detection of the high-pressure valve. The method comprises the following steps: connecting a reference sealing cavity in parallel in a test loop, counteracting environment drift and slow change of gas supply, and calculating a leakage rate and deducting a background leakage rate according to the change of effective volume and pressure of the test loop along with time and the change of gas temperature along with time in combination with a real gas compression factor. And when the difference value between the gas temperature and the valve body temperature exceeds a temperature difference judgment threshold value, the leakage rate is corrected. And comparing the leakage rate with a preset leakage rate threshold value to obtain a judgment result. According to the invention, the voltage stabilization time is shortened, the thermal transient state and environmental drift are inhibited, and the small leakage detection capability, the result consistency and the judgment accuracy of the high-pressure valve are improved.

The invention relates to a predictive maintenance-oriented mechanical seal leakage rate on-line monitoring method and a predictive maintenance-oriented mechanical seal leakage rate on-line monitoring system. According to the method, historical data of a multi-dimensional sensor is collected and preprocessed, and causal inference is carried out based on a time sequence relation so as to accurately identify a direct reason variable and a hybrid variable which influence the leakage rate and quantify a causal effect of the direct reason variable and the hybrid variable; then, a special causal feature set is constructed by utilizing the causal knowledge to train an attention neural network model deeply fused with causal effect intensity, finally, the model is utilized to perform online monitoring and prediction on real-time data, and dynamic updating of the model is triggered according to a performance evaluation result of a prediction sequence. Therefore, more accurate, more robust and causal interpretable prediction of the mechanical seal leakage rate under the complex dynamic working condition is realized, and the decision accuracy of predictive maintenance and the system adaptive capacity are effectively improved.

The invention belongs to the technical field of nuclear reactor monitoring, and particularly relates to a pressurized water reactor primary loop system leakage online monitoring method. Comprising the following steps: step 1, total leakage rate measurement; step 2, recognizable leakage monitoring; step 3, monitoring unrecognizable leakage; step 4, determining positions and types of identifiable leakage and unidentifiable leakage; 5, determining the position and the type of leakage between systems; 6, leakage trend judgment; and 7, giving an operation suggestion. The method has the beneficial effects that an artificial intelligence technology is combined, a theoretical calculation model of the leakage rate of a reactor and a primary loop system is optimized, information such as leakage rate data is monitored and displayed in real time, when the leakage rate data is abnormal, an alarm is given in time, the reason of abnormality is automatically diagnosed and analyzed, and the abnormal condition of the leakage rate is tracked; the leakage rate trend is judged, operation suggestions are given, the work of nuclear power plant operation personnel is reduced, and human errors are effectively avoided.

The invention provides a flange sealing surface damage assessment method and device based on a leakage rate. The method comprises the following steps: obtaining a leakage rate formula reflecting the influence of a flange sealing surface defect according to a seepage principle; performing a leakage experiment on the customized damaged flange to fit correction parameters in a leakage rate formula to obtain a corrected leakage rate formula; and flange damage parameters are sampled through a Bayesian formula, sampling data are substituted into the corrected leakage rate formula to obtain a leakage rate calculation value, posterior distribution of the damage parameters under the given leakage rate is determined, and the damage grade corresponding to the posterior distribution of the damage parameter with the maximum probability is selected as an evaluation result. According to the method, the damage of the flange sealing surface can be quickly evaluated based on the direct observation data of the leakage rate, a complicated surface appearance scanning step is not needed, the evaluation process is simplified, the practical engineering application is facilitated, the sealing and safety performance of equipment can be guaranteed, and the method has high application and popularization values.

The invention provides a method for evaluating the clearance fit sealing performance of a plate fastener for a machine. The method comprises the following steps of initial leakage rate detection, air pressure loading test, leakage state detection after helium stamping, data analysis and evaluation and formation of the evaluation method. The leakage state of the aircraft composite fuselage fastener screw hole can be accurately recognized and positioned through an efficient method, and it is ensured that the sealing performance is accurately evaluated. The method is rapid and reliable, can comprehensively detect the sealing effect of the aircraft plate in the service state, verifies whether the aircraft plate meets the design requirements or not, and timely identifies potential weaknesses, thereby enhancing the safety and reliability of an aircraft. Meanwhile, the method can also verify the stability of the sealing performance of the screw hole under the continuous barometric load, and ensures the safe service of an airplane.

The invention relates to an automatic leak hunting method for a chemical vapor deposition chamber, which comprises the following steps: S1, after coating is completed and a substrate is taken out, judging whether a self-cleaning condition is met or not, if so, executing self-cleaning and turning to the next step, otherwise, continuing coating work; s2, self-cleaning is carried out, a process cavity volume film is removed, whether the automatic leakage detection condition is met or not is judged, if yes, automatic leakage detection is carried out, and if not, film coating work continues to be carried out; at the moment, the process cavity is subjected to leak rate detection under the condition of no film deposition, so that the leak rate detection eliminates the influence of residual gas volatilized by the film deposition; in leak rate detection, a lower electrode of a chemical vapor deposition chamber is moved to a low position so as to avoid residual gas release caused by the fact that the lower electrode is close to and bakes a back plate and an upper electrode. The method is beneficial for improving the accuracy of automatic leak detection of the chemical vapor deposition chamber.

A seal is configured to reduce leak rates on a safety valve. These configurations may direct escaping material through a tortuous flow path that can significantly dissipate the amount of flow that exits the device. This tortuous flow path may include features, like undulations or loops, which can affect flow in a way that achieves these exit parameters for the flow.

The invention discloses a leak detector leak rate prediction method based on function fitting and correlation analysis, and relates to the technical field of helium mass spectrometer leak detector detection.The leak detector leak rate prediction method comprises the steps that a leak rate and time associated sequence corresponding to a leak hole is collected, function fitting processing is conducted on the leak rate and time associated sequence, and a leak rate attenuation feature model is obtained; then a real-time data fitting model corresponding to the leak hole is collected, correlation analysis is carried out on the real-time data fitting model and the corresponding leak rate attenuation feature model, and a correlation analysis result is determined; and finally, on the basis of the correlation analysis result, the leak rate of the leak hole is predicted, a leak rate prediction result is determined, the judgment time can be greatly shortened in any leak rate range, and the leak detection efficiency is greatly improved.

A gas permeation and leakage rate testing device and method for a non-metallic hydrogen transmission pipe. The device includes: a testing member formed with a testing cavity adapted to placing a to-be-tested pipe, and the testing cavity being formed with a sealed testing chamber after the to-be-tested pipe is placed therein; a calibration chamber selectively communicated with the testing chamber; a first gas-filling assembly selectively communicated with the calibration chamber to be adapted to filling a gas into the calibration chamber to a first set pressure; a measuring unit configured to measure pressures and temperatures in the calibration chamber and the testing chamber, and to calculate a calculated volume of the testing chamber; and a permeation and leakage rate testing unit configured to obtain a pressure change value of the testing chamber in a preset time interval and calculate a gas permeation and leakage rate of the to-be-tested pipe.

Embodiments described herein are generally directed to a software CE counter and leaky bucket for PCIe and CXL devices. In an example, when a burst of CEs exceeding an error threshold is reported by a PCIe or CXL device associated with a computer system, CE reporting for the device is disabled and a notification is issued to the BMC. Responsive to receipt of the notification, the BMC performs threshold-based error rate monitoring. An error counter is decremented by the BMC in accordance with a leak rate of a leaky bucket implemented by the BMC for the device. During periodic error monitoring performed by the BMC for new CEs logged by the device, the error counter is incremented when a new correctable error has been logged by the device since a prior error monitoring interval. Based on the error counter, the BMC distinguishes between persistent and temporal errors of the device.

The invention provides a nuclear power plant primary loop leakage rate calculation method and system, and the method comprises the steps: controlling a cooling medium to circularly flow in a test pipeline under a first preset pressure, and detecting whether the pressure boundary of a primary loop leaks or not; when the pressure boundary of the primary loop does not leak, controlling the circulating flow test duration of the cooling medium in the test pipeline under a second preset pressure, detecting whether recognizable leakage exists in the primary loop, and obtaining a recognizable leakage rate, a side leakage rate outside the pressure boundary of the primary loop and test data; calculating the overall leakage rate of the loop according to the test data and the test duration; and calculating the total leakage rate and the unidentifiable leakage of the loop according to the overall leakage rate, the identifiable leakage rate and the side leakage rate. According to the invention, when the auxiliary system of the unit under construction of the nuclear power plant is not completed, a set of test water tank can be connected between the discharge pipeline interface and the charge pipeline interface of the loop.

The invention discloses a CO2 conveying pipeline leakage prediction method and device, relates to the technical field of CO2 conveying pipeline safety risk assessment, and aims to solve the problem that a reliable CO2 conveying pipeline leakage prediction method is lacked in related technologies. The method comprises the steps that pipeline parameters, leakage parameters and environment parameters are obtained; inputting the pipeline parameters, the leakage parameters and the environment parameters into a prediction model to obtain prediction data; the prediction data comprises at least one of the following data: a pipeline state, a leakage rate at a future moment, a leakage rate at the future moment and CO2 concentration distribution; the prediction model is a physical information neural network model; and according to the prediction data and the concentration threshold, calculating to obtain a dangerous area.