CN-122016179-A - Radioactive separation liquid leakage prevention monitoring method and system based on multi-sensor data

CN122016179ACN 122016179 ACN122016179 ACN 122016179ACN-122016179-A

Abstract

The invention relates to the technical field of radiation monitoring and discloses a method and a system for monitoring radioactive separation leakage prevention liquid based on multi-sensor data, wherein the method comprises the following steps of 1, dividing a monitoring area and establishing a process step reference model; the method comprises the steps of step 2, carrying out background counting measurement and baseline initialization, step 3, synchronously collecting radiation, liquid level, pressure and hydrops data, determining a net radiation measurement value and generating a space-time unified state vector, step 4, determining a liquid path abnormal quantity and a liquid event judgment result, step 5, determining an actual normalized activity distribution proportion, an activity migration distortion quantity and a forbidden area activity out-of-range quantity to obtain a radioactive track abnormal judgment result, step 6, obtaining a system joint state and determining a priority abnormal source section, and step 7, determining a total measured activity, a radioactive activity loss judgment result and a monitoring result of the system. The invention realizes the automatic monitoring and positioning of the risks of liquid abnormality, radioactive migration abnormality and radioactive leakage.

Inventors

GU LONG
Su Xingkang
WANG GUAN
HUANG HUA

Assignees

福建睿斯科医疗技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (9)

1. The radioactive separation leakage-proof monitoring method based on the multi-sensor data is characterized by comprising the following steps of: step 1, acquiring liquid path layout and process step division information of a radioactive separation system, dividing monitoring areas of the radioactive separation system, and establishing a process step reference model of each monitoring area under each process step; Step 2, carrying out background counting measurement and baseline initialization based on each monitoring area to obtain a radiation background count value, a liquid level initial baseline value, a pressure initial baseline value and a hydrops detection initial baseline value; step 3, synchronously collecting an original radiation measured value, a liquid level real-time value, a pressure real-time value and a hydrops detection real-time value based on a process step reference model and a current process step state, determining a net radiation measured value, and generating a space-time unified state vector; step 4, determining the abnormal quantity of the liquid path based on the space-time unified state vector, the process step reference model and the initial baseline value of the effusion detection, and obtaining a liquid event judgment result; step 5, determining the actual normalized activity distribution proportion, the activity migration distortion amount and the forbidden region activity out-of-limit amount based on the space-time unified state vector and the process step reference model, and obtaining a radioactive track abnormality judgment result; Step 6, obtaining a system joint state based on the liquid event judgment result, the radioactive track abnormality judgment result, the liquid path abnormality amount and the net radiation measurement value, and determining a priority abnormality source section; and 7, based on the system joint state, the priority abnormal source section, the process step reference model and the space-time unified state vector, executing automatic treatment, and determining the total measured activity, the radioactivity loss judgment result and the monitoring result of the system.
2. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein obtaining the liquid path layout and the step division information of the radioactive separation system, dividing the monitoring areas of the radioactive separation system, and establishing a step reference model of each monitoring area under each step, comprises: Step 11, dividing the radioactive separation system into a sample injection area, a separation inlet area, a separation main body area, a product collection area, a waste liquid guiding area, a blocking detection area and a non-process area in the shell according to the liquid path layout of the radioactive separation system, so as to obtain each monitoring area; step 12, configuring a radiation measurement unit, a liquid level detection unit, a pressure detection unit and a effusion detection unit according to each monitoring area, dividing a radioactive separation process into preparation, sample loading, entering a separation section, staying, eluting, collecting products, discharging waste liquid and finishing each process step according to process step division information; And 13, respectively determining an expected activity distribution proportion, a liquid level reference value and a pressure reference value for each monitoring area under each process step, and carrying out association record on the expected activity distribution proportion, the liquid level reference value and the pressure reference value corresponding to each monitoring area under each process step to form a process step reference model of each monitoring area under each process step.
3. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein based on a process step reference model and a current process step state, raw radiation measurements, a liquid level real-time value, a pressure real-time value, and a effusion detection real-time value are synchronously collected and a net radiation measurement is determined, generating a space-time unified state vector, comprising: Step 21, synchronously collecting an original radiation measured value, a liquid level real-time value, a pressure real-time value and a hydrops detection real-time value of each monitoring area at the current sampling time based on the current process step state, wherein the current process step state represents the process step at the current sampling time; Step 22, based on the original radiation measured value and the radiation background count value of each monitoring area, subtracting the corresponding radiation background count value from the original radiation measured value of each monitoring area to obtain a net radiation measured value of each monitoring area; Step 23, based on the current sampling time, integrating the net radiation measured value, the liquid level real-time value, the pressure real-time value, the hydrops detection real-time value and the current process step state of each monitoring area to generate a space-time unified state vector.
4. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein determining a fluid pathway anomaly and obtaining a fluid event decision based on a space-time unified state vector, a process step reference model, and a fluid detection initial baseline value, comprises: step 31, extracting a liquid level real-time value, a pressure real-time value, a hydrops detection real-time value and a current step state of each monitoring area based on the space-time unified state vector, and determining a liquid level reference value and a pressure reference value of each monitoring area from a step reference model based on the current step state; step 32, respectively determining a liquid level deviation absolute value, a pressure deviation absolute value and a hydrops detection deviation absolute value based on the liquid level real-time value, the pressure real-time value, the hydrops detection real-time value, the liquid level reference value, the pressure reference value and the hydrops detection initial baseline value of each monitoring area, and respectively multiplying the three deviation absolute values by corresponding weight coefficients and then summing to obtain the liquid path abnormal quantity of each monitoring area; And step 33, comparing the liquid path abnormal quantity of each monitoring area with the corresponding liquid path abnormal quantity judging threshold value based on the liquid path abnormal quantity of each monitoring area and the corresponding liquid path abnormal quantity judging threshold value, judging that a liquid event occurs when the liquid path abnormal quantity of one monitoring area reaches or exceeds the corresponding liquid path abnormal quantity judging threshold value, determining the monitoring area as an abnormal monitoring area, and judging that the liquid event does not occur when the liquid path abnormal quantity of each monitoring area is lower than the corresponding liquid path abnormal quantity judging threshold value, so as to obtain a liquid event judging result.
5. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein determining an actual normalized activity distribution ratio, an activity migration distortion amount, and a forbidden zone activity out-of-range amount based on a space-time unified state vector and a process step reference model to obtain a radioactive trajectory anomaly determination result comprises: Step 41, extracting a net radiation measured value and a current step state of each monitoring area based on the space-time unified state vector, and determining an expected activity distribution proportion of each monitoring area and a forbidden activity monitoring area set of the current step from a step reference model based on the current step state; Step 42, determining the ratio of the net radiation measured value of each monitoring area to the total of the net radiation measured values of all monitoring areas as the actual normalized activity distribution proportion of each monitoring area, multiplying the absolute value of the deviation of the actual normalized activity distribution proportion of each monitoring area and the corresponding expected activity distribution proportion by the activity importance weight corresponding to each monitoring area respectively, and then summing to obtain the activity migration distortion amount; And 43, summing the net radiation measured values of all the monitoring areas in the forbidden activity monitoring area set based on the forbidden activity monitoring area set of the current process step to obtain an forbidden activity out-of-limit amount, comparing the activity migration distortion amount with an activity migration distortion amount judgment threshold, and comparing the forbidden activity out-of-limit amount with the forbidden activity out-of-limit amount judgment threshold to obtain a radioactive track abnormity judgment result.
6. The method for monitoring leak protection of radioactivity separation based on multi-sensor data according to claim 5, wherein in the step 43, it is determined that a radioactive trace abnormality has occurred when the activity migration distortion amount reaches or exceeds an activity migration distortion amount determination threshold or when the forbidden activity out-of-range amount reaches or exceeds a forbidden activity out-of-range amount determination threshold, and it is determined that a radioactive trace abnormality has not occurred when the activity migration distortion amount is lower than the activity migration distortion amount determination threshold and the forbidden activity out-of-range amount is lower than the forbidden activity out-of-range amount determination threshold.
7. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein deriving a system joint state and determining a priority anomaly source segment based on a fluid event determination result, a radioactive trajectory anomaly determination result, a fluid path anomaly quantity, and a net radiation measurement value, comprising: Step 51, carrying out combination judgment based on a liquid event judgment result and a radioactive track abnormality judgment result, and determining that the system joint state is in a normal state when no liquid event occurs and no radioactive track abnormality occurs, determining that the system joint state is in a common liquid abnormality when the liquid event occurs and no radioactive track abnormality occurs, determining that the system joint state is in a radioactive path false migration when the liquid event does not occur and the radioactive track abnormality occurs, and determining that the system joint state is in a radioactive leakage high risk state when the liquid event occurs and the radioactive track abnormality occurs; Step 52, assigning a step inhibition activity identification value to each monitoring area based on the inhibition activity monitoring area set of the current step, determining the step inhibition activity identification value of a monitoring area as one when a certain monitoring area belongs to the inhibition activity monitoring area set of the current step, determining the step inhibition activity identification value of a monitoring area as zero when a certain monitoring area does not belong to the inhibition activity monitoring area set of the current step, and establishing a zone-by-zone positioning input relation based on the liquid path abnormal quantity, the net radiation measurement value and the step inhibition activity identification value of each monitoring area; Step 53, multiplying the ratio of the liquid path abnormal quantity of each monitoring area to the liquid path abnormal threshold value corresponding to each monitoring area by the liquid path abnormal positioning weight, multiplying the ratio of the net radiation measured value of each monitoring area to the radiation threshold value corresponding to each monitoring area by the radiation abnormal positioning weight, multiplying the step forbidden activity identification value of each monitoring area by the step forbidden activity attribute positioning weight, summing the three results to obtain the partition positioning score of each monitoring area, and determining the monitoring area with the largest partition positioning score as the priority abnormal source section.
8. The multi-sensor data-based radioactive separation leak protection monitoring method of claim 1, wherein performing automatic handling based on a system joint state, a priority anomaly source segment, a process step reference model, and a spatio-temporal unification state vector, determining a total measured activity of the system, a radioactivity loss determination result, and a monitoring result, comprises: step 61, executing automatic treatment based on the system combination state and the priority abnormal source section, freezing the step to advance and pause the subsequent liquid input when the system combination state is normal liquid abnormality, pausing the current separation step switching when the system combination state is the radioactive path mismigration, stopping sample injection and cutting off the upstream and downstream liquid paths associated with the priority abnormal source section when the system combination state is the radioactive leakage high risk state; Step 62, extracting the net radiation measured value of each monitoring area based on the space-time unified state vector, and summing the net radiation measured values of each monitoring area to obtain the total measured activity of the system; And step 63, comparing the activity consistency difference value with an activity consistency difference value judgment threshold value, determining that the real radioactivity loss exists when the activity consistency difference value reaches or exceeds the activity consistency difference value judgment threshold value, determining that the real radioactivity loss does not exist when the activity consistency difference value is lower than the activity consistency difference value judgment threshold value, and combining the system joint state, the priority abnormal source section and the radioactivity loss judgment result to obtain a monitoring result.
9. A multi-sensor data-based radioactive separation leak protection monitoring system, characterized in that a multi-sensor data-based radioactive separation leak protection monitoring method according to any one of claims 1 to 8 is adopted, comprising: The reference model construction module is used for acquiring the liquid path layout and the step division information of the radioactive separation system, dividing the monitoring areas of the radioactive separation system and establishing a step reference model of each monitoring area under each step; the baseline calibration initialization module is used for carrying out background counting measurement and baseline initialization based on each monitoring area to obtain a radiation background count value, a liquid level initial baseline value, a pressure initial baseline value and a hydrops detection initial baseline value; the state vector generation module is used for synchronously collecting an original radiation measured value, a liquid level real-time value, a pressure real-time value and a hydrops detection real-time value based on the process step reference model and the current process step state, determining a net radiation measured value and generating a space-time unified state vector; The liquid path abnormality judging module is used for determining the liquid path abnormality quantity based on the space-time unified state vector, the process step reference model and the liquid accumulation detection initial baseline value and obtaining a liquid event judging result; The track abnormality judging module is used for determining the actual normalized activity distribution proportion, the activity migration distortion amount and the forbidden region activity out-of-limit amount based on the space-time unified state vector and the process step reference model to obtain a radioactive track abnormality judging result; The joint analysis positioning module is used for obtaining a system joint state based on the liquid event judgment result, the radioactive track abnormality judgment result, the liquid path abnormality amount and the net radiation measurement value and determining a priority abnormality source section; And the treatment verification output module is used for executing automatic treatment based on the system joint state, the priority abnormal source section, the process step reference model and the space-time unified state vector and determining the total measured activity, the radioactivity loss judging result and the monitoring result of the system.

Description

Radioactive separation liquid leakage prevention monitoring method and system based on multi-sensor data Technical Field The invention belongs to the technical field of radiation monitoring, and particularly relates to a radioactive separation liquid leakage prevention monitoring method and system based on multi-sensor data. Background Radionuclide separation technology is widely applied to the fields of nuclear medicine isotope preparation, radiochemical analysis, nuclear fuel post-treatment and the like. During radioactive separation, liquids containing radioactive materials typically flow between different separation units through a piping system and accomplish the separation of the nuclides in a particular separation medium or device. Due to the high radiation hazard of radioactive materials, once liquid leakage or abnormal migration occurs during transport or separation, equipment contamination, elevated levels of environmental radiation, and operational safety risks may result. Therefore, in the operation process of the radioactive separation system, the real-time monitoring of the liquid transportation state and the radioactive substance distribution state is of great significance. In the prior art, monitoring of a radioactive system is generally based on radiation measurement, for example by arranging radiation detectors to monitor the radiation intensity of a local area of the system to determine if there is a radioactive leak. However, when monitoring is performed only on a single radiation signal, it is often difficult to distinguish between radiation changes generated during normal process operation and radiation changes caused by abnormal leakage. In addition, abnormal migration of radioactive liquid in the system is usually accompanied by liquid level change, pressure change, abnormal effusion and other phenomena, and if judgment is performed only by radiation signals, misjudgment or missed judgment is easy to occur. On the other hand, during complex radioactive separation processes, radioactive materials can form different spatial distributions in various regions of the system during different phases of operation. The existing monitoring mode generally lacks comprehensive analysis of the relationship between the separation process stage and the radioactivity distribution rule, so that the abnormal migration path of radioactive substances in the system is difficult to accurately identify. When the system is leaked or abnormally diffused by the pipeline, the system often needs to rely on manual analysis of various monitoring data to judge, and the monitoring efficiency and the reliability are limited to a certain extent. Disclosure of Invention The invention provides a radioactive separation leakage-proof monitoring method and a radioactive separation leakage-proof monitoring system based on multi-sensor data, which solve the technical problems that in the related art, liquid leakage and abnormal migration of radioactive substances are difficult to accurately identify in the radioactive separation process due to the fact that monitoring is carried out only by means of a single radiation measurement signal. The invention provides a radioactive separation leakage-proof monitoring method based on multi-sensor data, which comprises the following steps: step 1, acquiring liquid path layout and process step division information of a radioactive separation system, dividing monitoring areas of the radioactive separation system, and establishing a process step reference model of each monitoring area under each process step; Step 2, carrying out background counting measurement and baseline initialization based on each monitoring area to obtain a radiation background count value, a liquid level initial baseline value, a pressure initial baseline value and a hydrops detection initial baseline value; step 3, synchronously collecting an original radiation measured value, a liquid level real-time value, a pressure real-time value and a hydrops detection real-time value based on a process step reference model and a current process step state, determining a net radiation measured value, and generating a space-time unified state vector; step 4, determining the abnormal quantity of the liquid path based on the space-time unified state vector, the process step reference model and the initial baseline value of the effusion detection, and obtaining a liquid event judgment result; step 5, determining the actual normalized activity distribution proportion, the activity migration distortion amount and the forbidden region activity out-of-limit amount based on the space-time unified state vector and the process step reference model, and obtaining a radioactive track abnormality judgment result; Step 6, obtaining a system joint state based on the liquid event judgment result, the radioactive track abnormality judgment result, the liquid path abnormality amount and the net radiation measurement value, and determining a pr