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CN-122017921-A - Real-time monitoring method and system for whole-course radiation dose in At-211 production process

CN122017921ACN 122017921 ACN122017921 ACN 122017921ACN-122017921-A

Abstract

The invention relates to the technical field of radiation monitoring and discloses a real-time monitoring method and a real-time monitoring system for the whole radiation dose in an At-211 production process, wherein the method comprises the steps of synchronously and real-time acquiring a gamma ray dose rate and a neutron dose rate respectively on At least three fixed space points forming 0 degrees, 90 degrees and 180 degrees with the axis of a proton beam on the periphery of a bombardment cavity of a target material bombarded by the proton beam, and simultaneously acquiring the intensity of the proton beam in real time in the proton beam transmission process; through the collaborative analysis of a plurality of steps, a dose monitoring instruction capable of judging abnormal or normal radiation dose is generated, the internal and external radiation situation and potential abnormal risks are accurately reflected, the influence of signal lag or distortion of an external radiation detector is effectively avoided, further, the radiation dose change in a bombardment cavity caused by instantaneous fluctuation of proton beam intensity is accurately captured, and the health and safety of an At-211 production bombardment link and whole-process radiation are ensured.

Inventors

  • GU LONG
  • Su Xingkang
  • WANG GUAN

Assignees

  • 福建睿斯科医疗技术有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The real-time monitoring method for the whole radiation dose in the At-211 production process is characterized by comprising the following steps of: Step S1, synchronously and real-time acquiring a gamma ray dosage rate and a neutron dosage rate respectively on the periphery of a bombardment cavity of a target bombarded by proton beam, at least on three fixed spatial point positions forming 0 degrees, 90 degrees and 180 degrees with the axis of the proton beam, and simultaneously acquiring the intensity of the proton beam in real time in the proton beam transmission process; s2, respectively preprocessing the gamma ray dose rate, the neutron dose rate and the proton beam intensity, and then analyzing to generate a cavity radiation situation index which represents the comprehensive radiation situation of the periphery of the cavity in the current bombardment state; Step S3, carrying out cooperative calculation on the cavity radiation situation index and the preprocessed proton beam intensity to obtain an internal radiation risk value representing the potential abnormal risk of the current bombardment cavity internal radiation dose field; s4, analyzing the intensity of the current internal and external radiation field change according to the internal radiation risk value and the preprocessed proton beam intensity, and generating a dynamic risk threshold; and S5, comparing the internal radiation risk value with a dynamic risk threshold value to generate a dose monitoring instruction.
  2. 2. The method for real-time monitoring of total radiation dose in At-211 process according to claim 1, wherein the steps of pre-processing gamma ray dose rate, neutron dose rate and proton beam intensity respectively and analyzing to generate a cavity radiation situation index representing a comprehensive radiation situation outside the cavity in a current bombardment state, comprise: respectively calculating gamma ray dose rate and neutron dose rate of three fixed space points to generate a gamma dose discrete factor and a neutron dose discrete factor; And respectively analyzing the synchronicity of the gamma ray dosage rate and the neutron dosage rate of the 0-degree point position and the proton beam intensity to generate a gamma-beam synchronicity coefficient and a neutron-beam synchronicity coefficient.
  3. 3. The method for real-time monitoring of total radiation dose in At-211 production according to claim 2, wherein the gamma ray dose rate, neutron dose rate and proton beam intensity are respectively preprocessed and analyzed to generate a cavity radiation situation index representing a comprehensive radiation situation outside the cavity in a current bombardment state, further comprising: According to the gamma ray dose rate and neutron dose rate of three fixed space points, calculating the trend of radiation composite growth to obtain a mixed radiation change vector representing the intensity of the total radiation intensity change; And fusing the gamma dose discrete factor, the neutron dose discrete factor, the gamma-beam synchronization coefficient, the neutron-beam synchronization coefficient and the mixed radiation change vector to generate a cavity radiation situation index which represents the comprehensive radiation situation of the outer periphery of the cavity in the current bombardment state.
  4. 4. A method for real-time monitoring of total radiation dose for an At-211 production process according to claim 3, wherein the collaborative calculation of the cavity radiation situation index and the preprocessed proton beam intensity is performed to obtain an internal radiation risk value representing a potential abnormal risk of the current bombarding cavity internal radiation dose field, comprising: carrying out radiation-beam adaptation analysis on the cavity radiation situation index and the preprocessed proton beam intensity to generate a radiation-beam adaptation factor; Based on the radiation-beam current adaptation factor, analyzing a transient fluctuation rule of internal radiation dose along with the change of proton beam current intensity, and generating a transient radiation gradient value; And calculating a gradient enhancement ratio and a beam enhancement ratio according to the transient radiation gradient value and the proton beam intensity to obtain a radiation peak hidden danger value representing the peak risk intensity.
  5. 5. The method for real-time monitoring of total radiation dose for At-211 production according to claim 4, wherein the collaborative calculation is performed on the cavity radiation situation index and the preprocessed proton beam intensity to obtain an internal radiation risk value representing a potential abnormal risk of the current bombarding cavity internal radiation dose field, further comprising: and carrying out cooperative calculation on the transient radiation gradient value and the radiation peak hidden danger value to obtain an internal radiation risk value representing the potential abnormal risk of the current internal radiation dose field of the bombardment cavity.
  6. 6. The method for real-time monitoring of total radiation dose for an At-211 process of claim 5, wherein analyzing the intensity of current internal and external radiation field changes based on internal radiation risk values and pre-processed proton beam intensities, generating a dynamic risk threshold, comprises: Based on the internal radiation risk value and the preprocessed proton beam intensity, analyzing the change synchronization characteristics of the internal radiation risk value and the preprocessed proton beam intensity to generate a radiation-beam correlation coefficient; And according to the radiation-beam correlation coefficient, analyzing the variation degree of the current internal and external radiation fields along with the intensity of the proton beam, and generating a radiation drastic change degree value representing the variation intensity of the internal and external radiation fields.
  7. 7. The method for real-time monitoring of total radiation dose for an At-211 process of claim 6, wherein analyzing the intensity of current internal and external radiation field changes based on internal radiation risk values and pre-processed proton beam intensities, generating a dynamic risk threshold, further comprises: calculating a threshold calibration amplitude according to the radiation drastic degree value to obtain a threshold dynamic calibration factor; And integrating the radiation drastic degree value with a threshold dynamic calibration factor to generate a dynamic risk threshold.
  8. 8. The method for real-time monitoring of total radiation dose for an At-211 production process of claim 7, wherein comparing the internal radiation risk value to a dynamic risk threshold generates a dose monitoring instruction comprising: And carrying out collaborative contrast analysis on the internal radiation risk value and the dynamic risk threshold value, calculating the deviation degree of the internal radiation risk value and the dynamic risk threshold value, and generating a radiation risk deviation value.
  9. 9. The method for real-time monitoring of total radiation dose for an At-211 production process of claim 8, wherein comparing the internal radiation risk value to a dynamic risk threshold generates a dose monitoring instruction, further comprising: and judging the state of the current radiation dose according to the radiation risk deviation value, and generating a dose monitoring instruction.
  10. 10. Real-time monitoring system for radiation dose in whole course of At-211 production process, applied in the monitoring method as claimed in any one of claims 1-9, characterized in that it comprises: The data acquisition unit is used for synchronously acquiring the gamma ray dosage rate and the neutron dosage rate respectively and in real time on the periphery of a bombardment cavity of a target material bombarded by the proton beam at least on three fixed space points forming 0 degrees, 90 degrees and 180 degrees with the axis of the proton beam, and simultaneously acquiring the intensity of the proton beam in real time in the proton beam transmission process; the radiation dose analysis unit is used for respectively preprocessing the gamma ray dose rate, the neutron dose rate and the proton beam intensity and then analyzing the gamma ray dose rate, the neutron dose rate and the proton beam intensity to generate a cavity radiation situation index which represents the comprehensive radiation situation of the periphery of the cavity in the current bombardment state; The radiation risk analysis unit is used for carrying out cooperative calculation on the cavity radiation situation index and the preprocessed proton beam intensity to obtain an internal radiation risk value representing the potential abnormal risk of the current bombardment cavity internal radiation dose field; The radiation change analysis unit is used for analyzing the intensity of the current internal and external radiation field change according to the internal radiation risk value and the preprocessed proton beam intensity, and generating a dynamic risk threshold; and the radiation dose monitoring unit is used for comparing the internal radiation risk value with the dynamic risk threshold value to generate a dose monitoring instruction.

Description

Real-time monitoring method and system for whole-course radiation dose in At-211 production process Technical Field The invention relates to the technical field of radiation monitoring, in particular to a real-time monitoring method and a real-time monitoring system for the whole radiation dose in an At-211 production process. Background At present, in the At-211 production process, radiation dose is monitored mainly At the fixed position of key procedures such as At-211 target bombardment, product separation, purification, split charging and the like, and radiation dose detectors are arranged, so that the radiation dose detectors can acquire the doses of different rays At the point positions in real time, and the effect of monitoring the radiation dose in the At-211 production process in real time is achieved. However, the radiation dose monitoring mode still has the following defects that in the At-211 target material bombardment reaction stage, the stage is the link with highest radiation dose and strongest fluctuation in At-211 production, and because the radiation is strongly attenuated and scattered when penetrating through a cavity structure, the signal of an external radiation dose detector is seriously delayed and distorted, so that the radiation dose detector can only monitor the radiation dose of the whole periphery of a bombardment cavity, but cannot accurately capture the radiation dose change in the bombardment cavity caused by the instantaneous fluctuation of the beam intensity in the bombardment process, and further cannot judge whether the radiation dose is abnormal or not, and the real-time monitoring effect of the radiation dose in the bombardment stage is affected. Disclosure of Invention Aiming At the defects of the prior art, the invention provides a real-time monitoring method and a real-time monitoring system for the whole radiation dose in the At-211 production process, and solves the problems. The technical aim of the invention is realized by the following technical scheme: the real-time monitoring method for the whole radiation dose in the At-211 production process comprises the following steps: Step S1, synchronously and real-time acquiring a gamma ray dosage rate and a neutron dosage rate respectively on the periphery of a bombardment cavity of a target bombarded by proton beam, at least on three fixed spatial point positions forming 0 degrees, 90 degrees and 180 degrees with the axis of the proton beam, and simultaneously acquiring the intensity of the proton beam in real time in the proton beam transmission process; s2, respectively preprocessing the gamma ray dose rate, the neutron dose rate and the proton beam intensity, and then analyzing to generate a cavity radiation situation index which represents the comprehensive radiation situation of the periphery of the cavity in the current bombardment state; Step S3, carrying out cooperative calculation on the cavity radiation situation index and the preprocessed proton beam intensity to obtain an internal radiation risk value representing the potential abnormal risk of the current bombardment cavity internal radiation dose field; s4, analyzing the intensity of the current internal and external radiation field change according to the internal radiation risk value and the preprocessed proton beam intensity, and generating a dynamic risk threshold; and S5, comparing the internal radiation risk value with a dynamic risk threshold value to generate a dose monitoring instruction. Further, the gamma ray dose rate, neutron dose rate and proton beam intensity are respectively preprocessed and then analyzed to generate a cavity radiation situation index which represents the comprehensive radiation situation of the periphery of the cavity in the current bombardment state, and the method comprises the following steps: respectively calculating gamma ray dose rate and neutron dose rate of three fixed space points to generate a gamma dose discrete factor and a neutron dose discrete factor; And respectively analyzing the synchronicity of the gamma ray dosage rate and the neutron dosage rate of the 0-degree point position and the proton beam intensity to generate a gamma-beam synchronicity coefficient and a neutron-beam synchronicity coefficient. Further, the gamma ray dose rate, the neutron dose rate and the proton beam intensity are respectively preprocessed and then analyzed to generate a cavity radiation situation index which represents the comprehensive radiation situation of the periphery of the cavity in the current bombardment state, and the method further comprises the following steps: According to the gamma ray dose rate and neutron dose rate of three fixed space points, calculating the trend of radiation composite growth to obtain a mixed radiation change vector representing the intensity of the total radiation intensity change; And fusing the gamma dose discrete factor, the neutron dose discrete factor, the gamma-beam synchronization