A method for measuring containment leakage rate

Abstract

The present invention discloses a method for measuring the leakage rate of a containment, comprising: filling gas into the containment so that the pressure in the containment reaches a preset test pressure; monitoring the real-time pressure in the containment, and replenishing gas into the containment according to the monitoring result of the real-time pressure in the containment to maintain the real-time pressure in the containment equal to the preset test pressure, and detecting the flow rate of the gas replenished into the containment to determine the measured volume leakage rate; monitoring the temperature and / or humidity in the containment, and determining the compensation leakage rate according to the monitoring result of the temperature and / or humidity in the containment; determining the containment leakage rate according to the measured volume leakage rate and the compensation leakage rate. The present invention is based on real-time volume changes and can be completed in a constant pressure environment. It is a brand-new containment leakage rate measurement technology, and its calculation process is simple, which can be convenient for realizing real-time display.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear engineering, and in particular relates to a method for measuring the leakage rate of a containment shell. Background Art

[0002] The containment is the last physical barrier to ensure the safety of nuclear power plants. In nuclear power plants, the containment overall test, namely the containment pressure test, is an inspection of the quality of containment construction. The rigor of the containment overall test process, the accuracy of the test results, and the effectiveness of data analysis are important indicators to ensure the safe and stable operation of nuclear power plants.

[0003] The containment sealing is an important indicator to measure the quality of containment installation. The containment sealing can be determined by the containment leakage rate measurement test. At present, the containment leakage rate measurement test at home and abroad is mainly based on the absolute pressure decay method (also known as the "pressure drop method"), which has at least the following shortcomings:

[0004] (1) When measuring the containment leakage rate using the pressure drop method, the inflation must be stopped and the pressure change in the containment during the test period must be monitored. Since the gas in the containment will continue to leak to the outside during the test, the pressure in the containment will theoretically decrease gradually. Therefore, the initial pressure in the containment must be higher than the designed pressure platform to ensure that the pressure in the containment is not lower than the designed test pressure at the end of the test.

[0005] (2) The principle of the pressure drop method is to calculate the mass change of dry air in the containment between two moments. If there are large and repeated changes in humidity during the test, using the leakage rate of dry air to calculate the leakage rate of the actual gas in the containment will increase the deviation of the test results.

[0006] (3) The pressure drop method uses the dry air mass at multiple times to perform the least square method to obtain the mass change slope as the containment leakage rate. The calculation process is complicated and it is not easy to achieve real-time display of the containment leakage rate. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a method for measuring the leakage rate of a containment vessel in view of the above-mentioned deficiencies in the prior art. The method is based on real-time volume changes and can be completed under a constant pressure environment. It is a new containment vessel leakage rate measurement technology with a simple calculation process and can facilitate real-time display.

[0008] The technical solution to solve the above technical problems is as follows:

[0009] The present invention provides a method for measuring a containment leakage rate, comprising:

[0010] Fill the containment with gas to make the pressure inside the containment reach the preset test pressure;

[0011] Monitor the real-time pressure in the containment, and add gas to the containment according to the monitoring result of the real-time pressure in the containment to maintain the real-time pressure in the containment equal to the preset test pressure, and detect the flow rate of the gas added to the containment to determine the measured volume leakage rate;

[0012] Monitor the temperature and / or humidity in the containment, and determine the compensation leakage rate according to the monitoring results of the temperature and / or humidity in the containment;

[0013] The containment leakage rate is determined based on the measured volume leakage rate and the compensated leakage rate.

[0014] Preferably, the monitoring of the temperature and / or humidity in the containment and determining the compensation leakage rate according to the monitoring results of the temperature and / or humidity in the containment comprises the following steps:

[0015] Divide the internal space of the containment into k virtual temperature zones, monitor the temperature of each temperature zone respectively, and obtain real-time temperature data of each temperature zone at different times; and / or divide the internal space of the containment into m virtual humidity zones, monitor the humidity of each humidity zone respectively, and obtain real-time humidity data of each humidity zone at different times;

[0016] The compensated leakage rate is obtained according to the real-time temperature data of each temperature partition at different times, and / or according to the real-time humidity data of each humidity partition at different times.

[0017] Preferably, the compensation leakage rate is obtained by volume calculation, and the calculation step of the containment leakage rate includes:

[0018] calculating a compensation volume leakage rate as the compensation leakage rate;

[0019] Calculate the actual volume leakage rate according to the compensated volume leakage rate and the measured volume leakage rate;

[0020] The mass leakage rate is calculated according to the actual volume leakage rate to serve as the containment leakage rate.

[0021] Preferably, the calculating the actual volume leakage rate according to the compensated volume leakage rate and the measured volume leakage rate specifically includes:

[0022] Calculate the compensated volume leakage rate under the test working condition / standard working condition according to the real-time humidity data of each humidity zone at different times and the real-time temperature data of each temperature zone at different times under the test working condition / standard working condition;

[0023] According to the flow rate of gas added to the containment at each moment under the test working condition or gas supply environment, calculate the measured volume leakage rate under the test working condition / standard working condition;

[0024] The compensated volume leakage rate under the test working condition / standard working condition is added to the measured volume leakage rate under the test working condition / standard working condition to obtain the actual volume leakage rate under the test working condition / standard working condition.

[0025] Preferably, the measured volume leakage rate L under standard working conditions is 测,N∑∑ The calculation formula is:

[0026]

[0027] Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at the moment, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates t i-1 to i The effective specific temperature in the containment during the time period;

[0028] or:

[0029]

[0030] Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period, L 测,A∑i Indicates the gas supply environment at t i The cumulative measured volume leakage rate of all partitions at the moment, P Ai Indicates the real-time pressure in the pipeline that fills the containment with gas under the gas supply environment, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates the gas supply environment at t i-1 to i The effective specific temperature in the containment during the time period;

[0031] Measured volume leakage rate L under test conditions 测,p∑∑ The calculation formula is:

[0032]

[0033] Among them, L 测,P∑i Indicates the test conditions under t i The measured volume leakage rate accumulated across all zones at the moment.

[0034] Preferably, the compensation volume leakage rate is calculated based on the compensation of each temperature / humidity zone, wherein the compensation volume leakage rate L under the test working condition is 补,P∑∑ The calculation formula is:

[0035]

[0036] Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0 represents the test pressure, Δt represents t i-1 to i The duration of the moment, T ji Indicates that the jth temperature zone is at t i Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone;

[0037] Compensated volume leakage rate L under standard working conditions 补,N∑∑ The calculation formula is:

[0038]

[0039] Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0 Indicates the test pressure, P N represents the pressure under standard working conditions, Δt represents t i-1 to i The duration of a moment, T N Indicates the temperature under standard working conditions, T Hji-1 Indicates that the jth humidity zone is at t i-1 Absolute temperature at time, T Hji Indicates that the jth humidity zone is at t i Absolute temperature at time T ji Indicates that the jth temperature zone is at t i Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone.

[0040] Preferably, the calculating the mass leakage rate according to the actual volume leakage rate specifically includes:

[0041] First calculate the mass leakage rate N within a Δt period of time ∑i , and its calculation formula is:

[0042]

[0043] Among them, L 实,N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor pressure at time, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions;

[0044] or:

[0045]

[0046] Among them, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor partial pressure at the time, R represents the ideal gas constant, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions. Indicates t i to i-1 The effective specific temperature in the containment during the time period;

[0047] Then calculate the total mass leakage rate M over multiple consecutive Δt periods of time ∑∑ , the total mass leakage rate M ∑∑ That is the containment leakage rate, which is calculated as follows:

[0048]

[0049] Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period.

[0050] Preferably, the compensated volume leakage rate is calculated based on the average temperature of each temperature zone and the average humidity of each humidity zone in the containment, and the containment leakage rate is calculated using the following calculation formula, wherein, under the test working condition environment, the calculation formula of the containment leakage rate includes:

[0051] L实,P∑i =L 测,P∑i +L 补,P∑i

[0052]

[0053]

[0054] Among them, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at the moment, L 补,P∑i Indicates the test conditions under t i The cumulative compensation volume leakage rate of all partitions at the time, the subscript p represents the test conditions, and the subscript i represents t i time, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average saturated water vapor partial pressure of all partitions at the moment, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1 The average saturated water vapor partial pressure of all partitions at the moment, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0 represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, M P∑i Indicates the test conditions under t i The cumulative mass leakage rate of all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, P 0 Indicates the test pressure, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant;

[0055] Under standard working conditions, the calculation formula for the containment leakage rate includes:

[0056] L 实,N∑i =L 测,N∑i +L 补,N∑i

[0057]

[0058]

[0059] Among them, L 实N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,N∑i Indicates the standard working conditions at t i The cumulative measured volume leakage rate of all partitions at the moment, L 补,N∑i Indicates the standard working conditions at t i The accumulated compensation volume leakage rate of all partitions at the moment, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average water vapor partial pressure of all partitions at the time, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1 The average water vapor partial pressure of all partitions at the time, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0 represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions, M N∑i Indicates the standard working conditions at t i The accumulated mass leakage rate of all partitions at the moment, m 气 represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant.

[0060] Preferably, the monitoring of the temperature and / or humidity in the containment and determining the compensation leakage rate according to the monitoring results of the temperature and / or humidity in the containment comprises the following steps:

[0061] Divide the containment into a blocks and monitor the temperature and humidity of each block separately;

[0062] The compensation leakage rate is calculated based on the monitoring results of the temperature and humidity of each block and the volume of each block.

[0063] Preferably, the step of calculating the containment leakage rate comprises:

[0064] Calculate a blocks at t i to i+1 Volumetric leakage rate over time period;

[0065] According to a blocks in t i to i+1 The volume leakage rate of a time period is calculated for a block at t i to i+1 The mass leakage rate of the time period is taken as the containment leakage rate.

[0066] Preferably, the a blocks are i to i+1 Volumetric leakage rate over time The calculation formula is:

[0067]

[0068] Where a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at any time, T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, T c,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of gas in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas in the containment at the moment, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i Time to t i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure at time, f(T c,i,j ) indicates that the jth block is at ti+1 Saturated water vapor partial pressure in the containment at the moment;

[0069] The a blocks are at t i to i+1 Mass leakage rate G for a period of time out,i+1j The calculation formula is:

[0070]

[0071] Among them, j represents the jth block, i represents the tth i Time or t i to i+1 time period, a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at any time, T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, T c,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of gas in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas in the containment at the time, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i to i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time t(T c,i,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at the time, R g,eq,i+1,j Indicates that the jth block is at t i+1 The reduced gas constant of the gas in the containment at time.

[0072] The containment leakage rate measurement method provided by the present invention can be completed under the condition of maintaining a constant pressure inside the containment. It is a constant pressure containment leakage rate measurement technology. During the measurement process, continuous inflation should be maintained to keep the pressure inside the containment constant. The principle is to establish a constant pressure calculation model by analyzing the real-time gas volume change, thereby determining the containment leakage rate, which is completely different from the principle of the traditional pressure drop method (to analyze the mass change of dry air in the containment between two moments). In addition, the present method fully pays attention to the influence of temperature change and humidity change on the containment leakage rate measurement during the measurement process, and combined with the characteristics of continuous change of temperature and humidity, a suitable acquisition cycle can be given to calculate temperature compensation and humidity compensation. That is to say, the calculation model of the containment leakage rate in the present method analyzes the real leaked gas in the containment. The calculation model of the present method takes into account the influence of factors such as humidity change on pressure, and compensates for this part of the influence. The final measurement result will not be affected by factors such as humidity change in the containment, and the accuracy is higher than the pressure drop method. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 Schematic diagram of a method for measuring containment leakage rate in an embodiment of the present invention;

[0074] Figure 2 Schematic diagram of a method for measuring containment leakage rate in an embodiment of the present invention;

[0075] Figure 3 Schematic diagram of calculation flow of a method for measuring containment leakage rate in an embodiment of the present invention;

[0076] Figure 4 This is a real-time change diagram of the temperature inside the containment vessel within 24 hours in this embodiment;

[0077] Figure 5 This is a real-time change diagram of the humidity in the containment vessel within 24 hours in this embodiment;

[0078] Figure 6 This is a real-time change diagram of the pressure in the containment vessel within 24 hours in this embodiment;

[0079] Figure 7 This is a real-time change diagram of the flow rate of gas added to the containment within 24 hours in this embodiment;

[0080] Figure 8 is the actual volume leakage rate L within 24 hours in this embodiment 实,N∑i Real-time change chart of

[0081] Fig. 9 is the mass leakage rate M within 24 hours in this embodiment ∑i Real-time change chart. DETAILED DESCRIPTION

[0082] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0083] Example 1

[0084] like Figure 1 As shown, this embodiment discloses a method for measuring the leakage rate of a containment shell, comprising:

[0085] Fill the containment with gas to make the pressure inside the containment reach the preset test pressure;

[0086] Monitor the real-time pressure in the containment, and add gas to the containment according to the monitoring result of the real-time pressure in the containment to maintain the real-time pressure in the containment equal to the preset test pressure, and detect the flow rate of the gas added to the containment to determine the measured volume leakage rate;

[0087] Monitor the temperature and / or humidity in the containment, and determine the compensation leakage rate according to the monitoring results of the temperature and / or humidity in the containment;

[0088] The containment leakage rate is determined based on the measured volume leakage rate and the compensated leakage rate.

[0089] like Figure 2 As shown, the principle of this method is: divide the containment into multiple partitions, assuming that each partition is stable in an initial state: there is a leak to the air, and the leakage rate of the leak is L 0 At the same time, there is a constant pressure P 0 The infinite space continuously replenishes compressed gas into each partition to ensure that the pressure in each partition is always P 0 , the flow rate of the supplementary compressed gas is L D ; Let the free volume in each partition be V 0 , the test pressure is P 0 , the initial temperature of each partition is T 0 , the initial humidity of each partition is H 0 , the number of gas molecules in each partition is N 0 , when the above parameters are stable, the measured leakage rate is consistent with the actual leakage rate, that is, L D =L 0Moreover, since the pressure and volume of each partition remain unchanged under the test environment of constant pressure, the humidity H and temperature T may change over time. Therefore, this method also considers the influence of humidity and temperature on the measurement results, and takes L measured on the charging pipeline into account. D As the reference value or basic value of the containment leakage rate, on this basis, the temperature change volume compensation and humidity change volume compensation inside the containment (referred to as the shell) are introduced to obtain the compensated leakage rate. Among them, the calculation process is as follows Figure 3 shown.

[0090] Specifically, a pressure charging pipeline and a constant pressure test pipeline are set on the containment, and gas (for example, air, compressed air) is charged into the containment through the pressure charging pipeline to normally pressurize the containment, and the pressure in the containment or the pressure in the pressure charging pipeline is detected and fed back until the pressure in the containment approaches the preset pressure platform, and then the constant pressure test pipeline is switched to fill gas until the pressure in the containment reaches the preset test pressure, or gas is directly introduced from the pressure charging pipeline until the pressure in the containment reaches the preset test pressure, and then the containment leakage rate measurement is started. During the measurement process, since the containment is constantly leaking to the outside, in theory, the pressure in the containment is constantly decreasing, and gas is added to the containment through the constant pressure test pipeline. At the same time, the real-time pressure in the containment is monitored, and the flow rate of the supplementary gas is controlled according to the feedback result of the real-time pressure monitoring signal in the containment, so that the real-time pressure in the containment is always maintained equal to the preset test pressure, and the measured volume leakage rate is obtained by reading the flow rate of the supplementary gas.

[0091] It should be noted that the control method for maintaining the real-time pressure in the containment equal to the preset test pressure can also be: using a pressure greater than the test pressure P 0 The gas source is used to adjust the flow rate of gas added to the containment in real time through the pressure feedback inside the containment, and the gas is continuously added to the containment, so as to maintain the pressure inside the containment at P 0 Compared with the control method described above, this control method can effectively shorten the time to reach the preset test pressure for the first time and the period of slight pressure fluctuation on the test platform.

[0092] The temperature and / or humidity in the containment are monitored, and the compensation leakage rate is determined according to the monitoring results of the temperature and / or humidity in the containment, which may specifically include the following steps:

[0093] The internal space of the containment shell is divided into k virtual temperature zones, and the temperature of each temperature zone is monitored separately to obtain the real-time temperature data of each temperature zone at different times, and / or the internal space of the containment shell is divided into m virtual humidity zones, and the humidity of each humidity zone is monitored separately to obtain the real-time humidity data of each humidity zone at different times; the compensated leakage rate is obtained according to the real-time temperature data of each temperature zone at different times, and / or according to the real-time humidity data of each humidity zone at different times.

[0094] Specifically, the free space inside the containment is divided into several (e.g., k) virtual temperature zones by temperature sensors arranged in the containment, wherein a typical area or a room where gas flow is not smooth is taken as a zone, and the volume coefficient of each temperature zone cannot exceed 0.1. The temperature of each temperature zone is monitored by the temperature sensors arranged as above, and the temperature change data of each temperature zone is obtained. According to the temperature change data of each temperature zone, temperature compensation (i.e., temperature correction) calculation is performed in the k temperature zones, i.e., the compensation of temperature for volume change is calculated, wherein the initial temperature of the jth zone is set to T j0 , at △t=t i -t i-1 During this period of time, the temperature has been changing slowly, t i The temperature at this moment is set to T ji ; The free space inside the containment is divided into several (e.g., m) virtual humidity zones by humidity sensors arranged in the containment, wherein a typical area or a room where gas flow is not smooth is taken as a zone, and the humidity of each humidity zone is monitored by the humidity sensors arranged as above, and the humidity change data of each humidity zone is obtained. According to the humidity change data of each humidity zone, humidity compensation (i.e., humidity correction) calculation is performed in the m zones, i.e., the compensation of humidity for volume change is calculated, wherein the initial humidity of the jth zone is set to H j0 , at △t=t i -t i-1 During this period of time, the humidity has been changing slowly, t i The humidity at the moment is set to H ji .

[0095] In this embodiment, the compensation leakage rate is specifically obtained by volume calculation, and the calculation steps of the containment leakage rate include: calculating the compensation volume leakage rate as the compensation leakage rate; calculating the actual volume leakage rate according to the compensation volume leakage rate and the measured volume leakage rate; calculating the mass leakage rate according to the actual volume leakage rate as the containment leakage rate.

[0096] Specifically, the actual volume leakage rate is calculated based on the compensated volume leakage rate and the measured volume leakage rate, specifically including: calculating the compensated volume leakage rate under the test working condition / standard working condition according to the real-time humidity data of each humidity zone under the test working condition / standard working condition at different times and the real-time temperature data of each temperature zone under the test working condition / standard working condition at different times; calculating the measured volume leakage rate under the test working condition / standard working condition according to the flow rate of gas supplemented into the containment at each time under the test working condition or the gas supply environment; adding the compensated volume leakage rate under the test working condition / standard working condition and the measured volume leakage rate under the test working condition / standard working condition to obtain the actual volume leakage rate under the test working condition / standard working condition.

[0097] Taking the leakage rate compensation in m humidity zones and k temperature zones as an example, several sets of calculation models are provided below, as follows:

[0098] (1) The first set of computational models

[0099] (1-1) Calculate the compensation leakage rate

[0100] The compensated volume leakage rate is calculated based on the compensation for each temperature / humidity zone, where:

[0101] Compensated volume leakage rate L under test conditions 补,P∑∑ The calculation formula is:

[0102]

[0103] Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0represents the test pressure (0.42MPa.g, the absolute pressure is 0.5213MPa.a in the calculation, which will not be repeated in the following text), Δt represents t i-1 to i The duration of the moment, T ji Indicates that the jth temperature zone is at t i Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone;

[0104] Compensated volume leakage rate L under standard working conditions 补,N∑∑ The calculation formula is:

[0105]

[0106] Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0 Indicates the test pressure, P N represents the pressure under standard working conditions (1 atmosphere, 0.1013 MPa.a, which will not be repeated in the following text), Δt represents t i-1 to i The duration of a moment, T N It represents the temperature under standard working conditions (0℃, absolute temperature is 273.15K, which will not be described in detail below), T Hji-1 Indicates that the jth humidity zone is at t i-1 Absolute temperature at time, T Hji Indicates that the jth humidity zone is at t i Absolute temperature at time, T ji Indicates that the jth temperature zone is at ti Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone.

[0107] (1-2) Calculate the measured volume leakage rate

[0108] The volume leakage rate is generally measured by direct cumulative measurement using a flow meter with temperature and pressure measurement functions. However, for a flow meter without the above cumulative function, it is calculated using the following formula, where:

[0109] The measured volume leakage rate L under standard working conditions 测,N∑∑ The calculation formula is:

[0110]

[0111] The calculation formula is obtained by converting the test working condition environment in the containment into the standard working condition environment, where n represents the number of time periods or cycles, and i represents t i Time or t i-1 to i Time period, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at time t i The flow rate of gas added to the containment detected at any moment), P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates t i-1 to i The effective specific temperature in the containment during the period,

[0112] or,

[0113]

[0114] The calculation formula is obtained by converting the gas supply environment of the charging pipeline into the standard working environment, where n represents the number of time periods or cycles, and i represents t i Time or t i-1 to i Time period, L 测,A∑i Indicates the gas supply environment at t i The cumulative measured volume leakage rate of all partitions at time t i The flow value of the gas added to the containment detected at any moment), PAi Indicates the real-time pressure at the pipeline that fills the containment with gas under gas supply conditions, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates the gas supply environment at t i-1 to i The effective specific temperature inside the containment during the period.

[0115] Measured volume leakage rate L under test conditions 测,p∑∑ The calculation formula is:

[0116]

[0117] Among them, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at time t i The flow rate of gas added to the containment detected at any moment).

[0118] (1-3) Calculate the actual volume leakage rate

[0119] Actual volume leakage rate L 实 = equal to the sum of the measured volume leakage rate and the compensated volume leakage rate, then the actual volume leakage rate under the test conditions is L 实,P∑∑ The calculation formula is:

[0120] L 实,P∑∑ =L 测,P∑∑ +L 补,P∑∑

[0121] The actual volume leakage rate L under standard working conditions 实,N∑∑ The calculation formula is:

[0122] L 实,N∑∑ =L 测,N∑∑ +L 补,N∑∑

[0123] It should be noted that: in this embodiment, the subscript N represents the standard working condition environment, the subscript P represents the test working condition environment, and the subscript ∑∑ ​​represents the accumulation of all partitions at all times, which will not be repeated one by one in the following text.

[0124] (1-4) Calculate the mass leakage rate

[0125] The mass leakage rate is calculated based on the actual volume leakage rate. The calculation steps of the mass leakage rate include:

[0126] First calculate the mass leakage rate M within a Δt period of time ∑i , and its calculation formula is:

[0127]

[0128] Where, the subscript ∑i represents t i All partitions are accumulated at the moment, and the subscript N∑i represents the standard working condition under t i All partitions are accumulated at this moment, L 实,N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor pressure at time, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant (8.314 J·mol -1 ·k -1 ), P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions;

[0129] or,

[0130]

[0131] Where, the subscript ∑i represents t i All partitions are accumulated at the time, and the subscript P∑i represents the test condition under t i All partitions are accumulated at this moment, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor partial pressure at the time, R represents the ideal gas constant, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions. Indicates t i to i-1 The effective specific temperature in the containment during the period,

[0132] Then calculate the total mass leakage rate M over multiple consecutive Δt periods of time ∑∑ , the total mass leakage rate is the containment leakage rate of this method, and its calculation formula is:

[0133]

[0134] Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period.

[0135] (2) The second set of calculation models

[0136] Compared with the first group of calculation models (1), the calculation process is appropriately simplified. The compensated volume leakage rate is calculated based on the average temperature of each temperature zone and the average humidity of each humidity zone in the containment. The containment leakage rate is calculated using the following formula:

[0137] Under the test conditions, the calculation formula for the containment leakage rate includes:

[0138] L 实,P∑i =L 测,P∑i +L 补,P∑i

[0139]

[0140]

[0141] Among them, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at time t i The flow rate of gas added to the containment detected at any time), L 补,P∑i Indicates the test conditions under t i The cumulative compensation volume leakage rate of all partitions at the time, the subscript p represents the test conditions, and the subscript i represents t i time, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average saturated water vapor partial pressure of all partitions at the moment, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1The average saturated water vapor partial pressure of all partitions at the moment, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0 represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, M P∑i Indicates the test conditions under t i The cumulative mass leakage rate of all partitions at the moment, m 气 Indicates the molar mass of air, m 水 represents the molar mass of water vapor, P 0 Indicates the test pressure, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant;

[0142] Under standard working conditions, the calculation formula for containment leakage rate includes:

[0143] L 实,N∑i =L 测,N∑i +L 补,N∑i

[0144]

[0145]

[0146] Among them, L 实N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,N∑i Indicates the standard working conditions at t i The cumulative measured volume leakage rate of all partitions at the moment, L 补,N∑i Indicates the standard working conditions at t i The accumulated compensation volume leakage rate of all partitions at the moment, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average saturated water vapor partial pressure of all partitions at the moment, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1 The average saturated water vapor partial pressure of all partitions at the moment, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions, M N∑i Indicates the standard working conditions at t i The accumulated mass leakage rate of all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant.

[0147] It should be noted that the actual average pressure in the containment is around P 0 Therefore, P in each calculation formula in this embodiment is 0 It can also be replaced by the real-time measurement pressure P in the containment i (The relative change before and after replacement is only about 0.5%), and, using P i The calculation will be more consistent with the actual change process of the pressure inside the containment, and the result will be more accurate.

[0148] Below 1000m 3 Take the containment as an example, where the test pressure P 0 (absolute pressure) is 533.65 kPa, the number of temperature zones is 28, and the arrangement of each temperature sensor is shown in Table 1. The number of humidity zones is 10, and the arrangement of each humidity sensor is shown in Table 2. The calculation process of the above first group of calculation models is described in detail as follows:

[0149] Table 1

[0150]

[0151]

[0152] Table 2

[0153]

[0154] Since the temperature, humidity and pressure in the containment change in real time during the measurement process of this system, the flow rate of the supplementary gas on the intake pipeline will also change accordingly. The pressure gauge, temperature sensor, humidity sensor and other detectors in the containment continuously collect data within 24 hours to complete the measurement and analysis of the containment leakage rate, including:

[0155] The real-time change of the temperature inside the containment within 24 hours is as follows: Figure 4 As shown;

[0156] The real-time change of humidity in the containment within 24 hours is as follows: Figure 5 As shown;

[0157] The real-time changes of pressure in the containment within 24 hours are as follows: Figure 6 As shown;

[0158] The real-time changes of the gas flow rate added to the containment within 24 hours are as follows: Figure 7 shown.

[0159] Taking the first time period Δt = 10s (i.e. 0 to 10s) within 24h as an example, the single-moment volume leakage rate L 实,N∑i and the single moment mass leakage rate M ∑i Calculation:

[0160] The temperature data (unit: °C) collected by the T1-T28 temperature sensors at time ti-1 are:

[0161] 32.5680,32.5840,32.6770,32.7190,32.8540,33.0000,32. 9560,32.9010,32.8570,33.0530,32.8720,32.8330,32.7520,33.1960,32.8320,33.1960,33.0260,33.3470,32.9680,33.2100,33.3170,33.1310,33.2670,33.3580,33.2160,33.0400,32.3840, 32.4840;

[0162] H1-H10 humidity sensor i-1 The humidity value data (%) collected at each moment are as follows:

[0163] 48.1898,46.8971,47.1527,47.7582,46.3522,48.7407,46. 4725,46.7261,46.1951,48.9654;

[0164] In t i-1 The real-time pressure in the containment collected at all times is: 533.652kpa;

[0165] In t i-1 The gas flow rate in the pipeline that fills the containment shell is collected at all times, that is, the measured leakage rate (standard working conditions) is: 0.7945m 3 / h;

[0166] T1-T28 temperature sensor at t i Time (t i -t i-1 = 10s) the temperature data (unit: °C) collected are:

[0167] 32.5670,32.5810,32.6790,32.7170,32.8600,32.9950,32. 9550,32.9060,32.8540,33.0530,32.8750,32.8310,32.7530,33 .1950,32.8340,33.1980,33.0270,33.3480,32.9680,33.2100,33.3160,33.1320,33.2700,33.3560,33.2150,33.0390,32.3850, 32.4870;

[0168] H1-H10 humidity sensor i The humidity value data (%) collected at each moment are as follows:

[0169] 48.1968,46.8991,47.1556,47.7602,46.3552,48.7447,46. 4715,46.7281,46.1990,48.9595;

[0170] In t i The real-time pressure in the containment collected at all times is: 533.652kpa;

[0171] In t i The gas flow rate in the pipeline that fills the containment shell is collected at all times, that is, the measured leakage rate (standard working conditions) is: 0.7975m 3 / h;

[0172] Substituting the above collected data into the calculation formula described above, we get:

[0173] t i The effective specific temperature in the containment at this moment is:

[0174]

[0175] In t i-1 to i The measured volume leakage rate over the time period is:

[0176] L 测,N∑i =0.796m 3 / h.

[0177] According to the calculation model in Example 1, calculate respectively:

[0178] In t i-1 to i The compensated leakage rate during the time period is:

[0179] L 补,N∑i =3.16703m 3 / h.

[0180] In t i-1 to i The actual volume leakage rate during the time period is:

[0181] L 实,N∑i =L 测,N∑i +L 补,N∑i =3.96268m 3 / h

[0182] By t i-1 The temperature and humidity in the containment at time t can be calculated i-1 The partial pressure of water vapor in the containment at the moment is:

[0183] By t i The temperature and humidity in the containment at time t can be calculated i The partial pressure of water vapor in the containment at the moment is:

[0184] In t i-1 to i The actual mass leakage rate during the time period is:

[0185]

[0186] The collected data within 24 hours is divided into 24×360 time periods of 10 seconds. Each time period is calculated according to the above single moment calculation process to obtain 24×360 groups of single moment measured volume leakage rate L 测,N∑i , Compensation volume leakage rate L 补,N∑i , actual volume leakage rate L 实,N∑i and mass leakage rate M ∑i The calculations for other single time periods are not described here one by one, but only the actual volume leakage rate L within 24 hours is illustrated with a diagram. 实,N∑i and mass leakage rate M ∑i The process of change, including:

[0187] Actual volume leakage rate within 24 hours L 实,N∑i Real-time changes such as Figure 8 shown.

[0188] Mass leakage rate within 24 hours M ∑i Real-time changes such as Fig. 9 shown.

[0189] The measured volume leakage rate L at a single moment in all periods within 24 hours 测,N∑i The average value is calculated cumulatively and the measured volume leakage rate within 24 hours is calculated as follows:

[0190] L 测,N∑∑ =1.05534m 3 / h

[0191] Compensation volume leakage rate L for all periods of time within 24 hours 补,N∑i The average value is calculated cumulatively and the compensation volume leakage rate within 24 hours is calculated as follows:

[0192] L 测,N∑∑ =0.15381m 3 / h

[0193] Safety shell volume 1000m 3 , the relative volume leakage rate is 0.617553% of the total volume of gas in the containment / day.

[0194] The average actual volume leakage rate within 24 hours is:

[0195] L 实,N∑∑ =L 测,N∑∑ +L 补,N∑∑ =1.20915m 3 / h

[0196] The mass leakage rate M at a single moment in all periods within 24 hours ∑i , and the average value is calculated, and the mass leakage rate for 24 hours is calculated as:

[0197]

[0198] At time 0, the total mass of gas in the containment is 6063.65 Kg, and the relative mass leakage rate is 0.618286% of the total mass of gas in the containment / day.

[0199] The containment leakage rate measurement method of this embodiment can be completed under the condition of maintaining a constant pressure inside the containment. It is a constant pressure containment leakage rate measurement technology. During the measurement process, continuous inflation should be maintained to keep the pressure inside the containment constant. The principle is to establish a constant pressure calculation model by analyzing the real-time volume change, thereby determining the containment leakage rate, which is completely different from the principle of the traditional pressure drop method (to analyze the mass change of dry air in the containment between two moments). In addition, this method fully pays attention to the influence of temperature change and humidity change on the containment leakage rate measurement during the measurement process, and combined with the characteristics of continuous change of temperature and humidity, a suitable acquisition cycle can be given to calculate temperature compensation and humidity compensation. That is to say, the calculation model of the containment leakage rate in this method analyzes the real leaked gas in the containment. The calculation model of this method takes into account the influence of factors such as humidity change on pressure, and compensates for this part of the influence. The final measurement result will not be affected by factors such as humidity change in the containment, and the accuracy is higher than the pressure drop method.

[0200] Example 2

[0201] This embodiment discloses a method for measuring the containment leakage rate. Compared with the method for measuring the containment leakage rate described in Embodiment 1, the difference is that:

[0202] The temperature and / or humidity in the containment are monitored, and the compensation leakage rate is determined according to the monitoring results of the temperature and / or humidity in the containment, including the following steps: the containment is divided into a blocks, and the temperature and humidity of each block are monitored respectively; the compensation leakage rate is calculated according to the monitoring results of the temperature and humidity of each block and the volume of each block.

[0203] This method adopts a third group of calculation models (3) which is different from the first group of calculation models and the second group of calculation models in Example 1, and its specific calculation steps include:

[0204] Calculate a blocks at t i to i+1 Volumetric leakage rate over time period;

[0205] According to a blocks in t i to i+1 The volume leakage rate of a time period is calculated for a block at t i to i+1 The mass leakage rate in a time period is the containment leakage rate measured by this method.

[0206] Specifically, a block is in t i to i+1 Volumetric leakage rate over time The calculation formula is:

[0207]

[0208] Where a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at all times (i.e., the constant pressure test pipeline in this article), T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, T c,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of the gas (mixed gas) in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas (mixed gas) in the containment at the moment, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i Time to t i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time t(T c,i,j ) indicates that the jth block is at t i+1 Saturated water vapor partial pressure in the containment at the moment;

[0209] a block at t i to i+1 Mass leakage rate G for a period of time out,i+1j The calculation formula is:

[0210]

[0211] Among them, j represents the jth block, i represents the tth i Time or t i to i+1 time period, a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at any time, T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, Tc,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of the gas (mixed gas) in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas (mixed gas) in the containment at the moment, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i Time to t i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time t(T c,i,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time R g,eq,i+1,j Indicates that the jth block is at t i+1 The reduced gas constant of the gas in the containment at time.

[0212] The containment leakage rate measurement method of this embodiment can be completed under the condition of maintaining a constant pressure inside the containment. It is a constant pressure containment leakage rate measurement technology. During the measurement process, continuous inflation should be maintained to keep the pressure inside the containment constant. The principle is to establish a constant pressure calculation model by analyzing the real-time volume change, thereby determining the containment leakage rate, which is completely different from the principle of the traditional pressure drop method (to analyze the mass change of dry air in the containment between two moments). In addition, this method fully pays attention to the influence of temperature change and humidity change on the containment leakage rate measurement during the measurement process, and combined with the characteristics of continuous change of temperature and humidity, a suitable acquisition cycle can be given to calculate temperature compensation and humidity compensation. That is to say, the calculation model of the containment leakage rate in this method analyzes the real leaked gas in the containment. The calculation model of this method takes into account the influence of factors such as humidity change on pressure, and compensates for this part of the influence. The final measurement result will not be affected by factors such as humidity change in the containment, and the accuracy is higher than the pressure drop method.

[0213] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for measuring containment leakage rate, include: Fill the containment with gas to make the pressure inside the containment reach the preset test pressure; Monitor the real-time pressure in the containment, and add gas to the containment according to the monitoring result of the real-time pressure in the containment to maintain the real-time pressure in the containment equal to the preset test pressure, and detect the flow rate of the gas added to the containment to determine the measured volume leakage rate; Monitor the temperature and / or humidity in the containment, and determine the compensation leakage rate according to the monitoring results of the temperature and / or humidity in the containment; The containment leakage rate is determined based on the measured volume leakage rate and the compensated leakage rate.

2. The method for measuring containment leakage rate according to claim 1, It is characterized in that The temperature and / or humidity in the containment are monitored, and the compensation leakage rate is determined according to the monitoring results of the temperature and / or humidity in the containment, comprising the following steps: Divide the internal space of the containment into k virtual temperature zones, monitor the temperature of each temperature zone separately, and obtain real-time temperature data of each temperature zone at different times, and / or, The internal space of the containment is divided into m virtual humidity zones, the humidity of each humidity zone is monitored separately, and the real-time humidity data of each humidity zone at different times is obtained; The compensated leakage rate is obtained according to the real-time temperature data of each temperature partition at different times, and / or according to the real-time humidity data of each humidity partition at different times.

3. The method for measuring containment leakage rate according to claim 2, It is characterized in that The compensation leakage rate is specifically obtained by volume calculation, and the calculation steps of the containment leakage rate include: calculating a compensation volume leakage rate as the compensation leakage rate; Calculate the actual volume leakage rate according to the compensated volume leakage rate and the measured volume leakage rate; The mass leakage rate is calculated according to the actual volume leakage rate to serve as the containment leakage rate.

4. The method for measuring containment leakage rate according to claim 3, It is characterized in that The actual volume leakage rate is calculated according to the compensation volume leakage rate and the measured volume leakage rate, specifically comprising: Calculate the compensated volume leakage rate under the test working condition / standard working condition according to the real-time humidity data of each humidity zone at different times and the real-time temperature data of each temperature zone at different times under the test working condition / standard working condition; According to the flow rate of gas added to the containment at each moment under the test working condition or gas supply environment, calculate the measured volume leakage rate under the test working condition / standard working condition; The compensated volume leakage rate under the test working condition / standard working condition is added to the measured volume leakage rate under the test working condition / standard working condition to obtain the actual volume leakage rate under the test working condition / standard working condition.

5. The method for measuring containment leakage rate according to claim 4, It is characterized in that The measured volume leakage rate L under standard working conditions 测,N∑∑ The calculation formula is: Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at the moment, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates t i-1 to i The effective specific temperature in the containment during the period, or, Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period, L 测,A∑i Indicates the gas supply environment at t i The cumulative measured volume leakage rate of all partitions at the moment, P Ai Indicates the real-time pressure in the pipeline that fills the containment with gas under the gas supply environment, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. Indicates the gas supply environment at t i-1 to i The effective specific temperature in the containment during the time period; Measured volume leakage rate L under test conditions 测,p∑∑ The calculation formula is: Among them, L 测,P∑i Indicates the test conditions under t i The measured volume leakage rate accumulated across all zones at the moment.

6. The method for measuring containment leakage rate according to claim 4, It is characterized in that The compensated volume leakage rate is calculated based on the compensation of each temperature / humidity zone, where: Compensated volume leakage rate L under test conditions 补,P∑∑ The calculation formula is: Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0 represents the test pressure, Δt represents t i-1 to i The duration of the moment, T ji Indicates that the jth temperature zone is at t i Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone; Compensated volume leakage rate L under standard working conditions 补,N∑∑ The calculation formula is: Where n represents the number of time periods or cycles, m represents the number of humidity zones, and i represents t i Time or t i-1 to i time period, j represents the jth temperature zone or the jth humidity zone, k represents the number of temperature zones, H ji Indicates that the jth humidity zone is at t i Relative humidity at the time, H ji-1 Indicates that the jth humidity zone is at t i-1 Relative humidity at the time, P Hji Indicates that the jth humidity zone is at t i The saturated water vapor partial pressure at the time, P Hji-1 Indicates that the jth humidity zone is at t i-1 The saturated water vapor partial pressure at time V Hj It represents the percentage of the free volume of the containment vessel occupied by the jth humidity zone, V 0 represents the free volume of the containment, P 0 Indicates the test pressure, P N represents the pressure under standard working conditions, Δt represents t i-1 to i The duration of a moment, T N Indicates the temperature under standard working conditions, T Hji-1 Indicates that the jth humidity zone is at t i-1 Absolute temperature at time, T Hji Indicates that the jth humidity zone is at t i Absolute temperature at time, T ji Indicates that the jth temperature zone is at t i Absolute temperature at time, T ji-1 Indicates that the jth temperature zone is at t i-1 Absolute temperature at the moment, V Tj It represents the percentage of the free volume of the containment vessel occupied by the jth temperature zone.

7. The method for measuring containment leakage rate according to claim 4, It is characterized in that The calculation of the mass leakage rate according to the actual volume leakage rate specifically includes: First, calculate the mass leakage rate M within a time interval of Δt ∑i , and its calculation formula is as follows: Among them, L 实,N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 Indicates the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor pressure at time, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions. or, Among them, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor pressure at time, Indicates t i-1 The average water vapor partial pressure at the time, R represents the ideal gas constant, P 0 Indicates the test pressure, Indicates t i to i-1 The effective specific temperature in the containment during the time period; Then calculate the total mass leakage rate M over multiple consecutive Δt periods of time ∑∑ , the total mass leakage rate M ∑∑ That is the containment leakage rate, which is calculated as follows: Where n represents the number of time periods or cycles, i represents t i Time or t i-1 to i Time period.

8. The method for measuring containment leakage rate according to claim 4, It is characterized in that The compensated volume leakage rate is calculated based on the average temperature of each temperature zone and the average humidity of each humidity zone in the containment. The containment leakage rate is calculated using the following formula: Under the test conditions, the calculation formula for the containment leakage rate is: include: L 实,P∑i =L 测,P∑i +L 补,P∑i Among them, L 实,P∑i Indicates the test conditions under t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,P∑i Indicates the test conditions under t i The cumulative measured volume leakage rate of all partitions at the moment, L 补,P∑i Indicates the test conditions under t i The cumulative compensation volume leakage rate of all partitions at the time, the subscript p represents the test conditions, and the subscript i represents t i time, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average saturated water vapor partial pressure of all partitions at the moment, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1 The average saturated water vapor partial pressure of all partitions at the moment, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0 represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, M P∑i Indicates the test conditions under t i The cumulative mass leakage rate of all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, P 0 Indicates the test pressure, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant; Under standard working conditions, the calculation formula for the containment leakage rate includes: L 实,N∑i =L 测,N∑i +L 补,N∑i Among them, L 实N∑i Indicates the standard working conditions at t i The actual volume leakage rate accumulated in all partitions at the moment, L 测,N∑i Indicates the standard working conditions at t i The cumulative measured volume leakage rate of all partitions at the moment, L 补,N∑i Indicates the standard working conditions at t i The accumulated compensation volume leakage rate of all partitions at the moment, Indicates that at t i The average relative humidity of all partitions at the moment, Indicates that at t i The average water vapor partial pressure of all partitions at the time, Indicates that at t i-1 The average relative humidity of all partitions at the moment, Indicates that at t i-1 The average water vapor partial pressure of all partitions at the time, Indicates t i The average temperature at the time, Indicates t i-1 The average temperature at the time, V 0 represents the free volume of the containment, Δt represents t i-1 to i The duration of the moment, P 0 Indicates the test pressure, P N Indicates the pressure under standard working conditions, T N Indicates the temperature under standard working conditions, M N∑i Indicates the standard working conditions at t i The accumulated mass leakage rate of all partitions at the moment, m 气 Represents the molar mass of air, m 水 represents the molar mass of water vapor, Indicates t i The average water vapor partial pressure at the time, R represents the ideal gas constant.

9. The method for measuring containment leakage rate according to claim 1, It is characterized in that The temperature and / or humidity in the containment are monitored, and the compensation leakage rate is determined according to the monitoring results of the temperature and / or humidity in the containment, comprising the following steps: Divide the containment into a blocks and monitor the temperature and humidity of each block separately; The compensation leakage rate is calculated based on the monitoring results of the temperature and humidity of each block and the volume of each block.

10. The method for measuring containment leakage rate according to claim 9, It is characterized in that The calculation steps of the containment leakage rate include: Calculate a blocks at t i to i+1 Volumetric leakage rate over time period; According to a blocks in t i to i+1 The volume leakage rate of the time period is calculated as a block at t i to i+1 The mass leakage rate of the time period is taken as the containment leakage rate.

11. The method for measuring containment leakage rate according to claim 10, It is characterized in that The a blocks are at t i to i+1 Volumetric leakage rate over time The calculation formula is: Where a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at any time, T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, T c,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of gas in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas in the containment at the moment, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i Time to t i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time t(T c,i,j ) indicates that the jth block is at t i Saturated water vapor partial pressure in the containment at the moment; The a blocks are at t i to i+1 Mass leakage rate G for a period of time out,i+1j The calculation formula is: Among them, j represents the jth block, i represents the tth i Time or t i to i+1 time period, a represents the number of blocks, L in,i+1 Indicates the tth i+1 The gas volume flow rate at the outlet of the pipeline filled with gas at any time, T c,i+1,j Indicates that the jth block is at t i+1 The absolute temperature of the gas in the containment at the moment, T c,i,j Indicates that the jth block is at t i The absolute temperature of the gas in the containment at the moment, m c,i,j Indicates that the jth block is at t i The mass of gas in the containment at the moment, R g,eq,i,j Indicates that the jth block is at t i The equivalent gas constant of the gas in the containment at the moment, P c Indicates the pressure of the gas at the outlet of the gas-filled pipeline / in the containment, Δt indicates t i to i+1 The duration of the moment, V c,i,j represents the volume corresponding to the jth block, H c,i+1,j Indicates that the jth block is at t i+1 Relative humidity in the containment at time , H c,i,j Indicates that the jth block is at t i The relative humidity in the containment at the time, f(T c,i+1,j ) indicates that the jth block is at t i+1 The saturated water vapor partial pressure in the containment at time t(T c,i,j ) indicates that the jth block is at t i The saturated water vapor partial pressure in the containment at the time, R g,eq,i+1,j Indicates that the jth block is at t i+1 The reduced gas constant of the gas in the containment at time.

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