Radioactive biological experiment facility radiation environment monitoring and personal dose monitoring method

Abstract

The invention provides a radioactive biological experimental facility radiation environment monitoring and personal dose monitoring method, which comprises a fixed radiation dose monitor, a portable radiation dose monitor, a personal dose instrument, an experimental facility computer system docking port, an analysis center and an early warning judgment module, the experimental facility environment radiation dose can be monitored in real time, single-time operation personal cumulative doses under three different conditions can be obtained through an experimental facility computer system, radiation dose summary analysis can be carried out on radioactive sources operated in the experimental facility, radiation dose changes under different radioactive source operations are obtained, and the experimental facility environment radiation dose monitoring system can be used for monitoring the experimental facility environment radiation dose in real time. And finally, performing early warning according to the environmental radiation dose and the individual accumulated dose result. The environment radiation state can be monitored timely, accurately and effectively, and the external irradiation dose of personnel can be monitored and evaluated in real time.

Description

Technical Field

[0001] The invention relates to the technical field of radiation monitoring, and in particular to a method for monitoring the radiation environment and personal dose of a radioactive biological experimental facility. Background Art

[0002] Radioactive biological experiments mainly involve the use of radioactive nuclides. During the process of using radioactive nuclides for related experiments, workers will be exposed to the gamma rays, beta rays and alpha rays produced by them, which will increase the exposure dose of the personnel and have a certain impact on the personnel's body and the environment. Therefore, in addition to the need to set up radiation monitoring devices in radioactive biological experimental facilities, it is also necessary to monitor and warn the personal dose of the workers, and then promptly remind the personnel when abnormalities occur, judge the environmental status of the facilities, and ensure the safety of personnel and the environment.

[0003] In the prior art, radiation doses in the environment are mainly measured in real time using radiation dose meters, and external radiation doses of workers are monitored and evaluated regularly. The measured results are compared with set values, and an early warning is issued when the measured results exceed the set values.

[0004] However, personnel will take various protective measures at their operating positions, and radioactive biological experiments involve complex and diverse operations. The experimental objects, operating activities, and operating methods of different operating positions are different. Therefore, the location of the radiation dose meter will directly affect the validity of the measurement results. In addition, the external radiation dose of personnel is regularly evaluated, which has a certain lag and poses a greater risk to personnel health. Summary of the invention

[0005] The present invention aims to provide a method for monitoring the radiation environment and personal dose of a radioactive biological experimental facility in view of the defects of the prior art.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility, characterized in that it comprises the following steps:

[0008] S1: Arrange radiation dose monitors according to the operation positions involved in the radioactive biological experiment. The radiation dose monitors include fixed radiation dose monitors, portable radiation dose monitors, and personal dose monitors to monitor the external radiation dose received by the staff during the experimental operation;

[0009] S2: Record in the experimental facility computer system the start and end time of the operation, the type of experimental object operated, the specific activity of the radioactive source each time it is operated, the instrument used when using the radioactive source, and the specifications of the protective measures used;

[0010] S3: The data obtained in S1 and S2 are transmitted to the radiation dose analysis system, and the environmental radiation dose and personal radiation dose generated by the experimental operation in the corresponding operation area are summarized and analyzed according to the specific information of the experimental operation;

[0011] S4: Based on the analysis results, judgment is made by comparing with the preset radiation dose threshold range, and warnings of different levels are issued.

[0012] Furthermore, the calculation formula for estimating the external radiation dose at different locations in the laboratory using the fixed radiation dose monitor is:

[0013]

[0014] Among them, X j is the external radiation dose from the radiation source at the jth site in the working area, in Sv / h; X is the measurement value of the fixed radiation dose monitor, in Sv / h; R1 is the distance between the fixed radiation dose monitor and the radiation source, in m; R j The distance between the radiation source and the jth point in the working area, in meters.

[0015] Furthermore, the S1 specifically includes the following steps:

[0016] S101: According to the operation steps of radioactive biological experiments, the location of animal breeding and the location of personnel operation, set up fixed radiation monitoring and measuring instruments and mobile radiation dose monitors;

[0017] S102: Set up a portable radiation dose monitor according to the operation activity of the operation steps, the protective materials and protective effects of different parts of the protective measures, and the operating habits of the staff;

[0018] S103: Set up personal dosimeters based on the activity of the radiation source operated by the staff and the distance between the staff and the radiation source.

[0019] Furthermore, S102 also includes a computer recording the installation position of the portable radiation dose monitor and the correspondence between the operating activity of the operating steps, the protective materials and protective effects of different parts of the protective measures, and the operating habits of the staff, and establishing a file; setting the position of the portable radiation dose monitor according to the file.

[0020] Furthermore, S103 also includes that before wearing the personal dosimeter, the staff must clear the data generated in the instrument and record the personal dosimeter number, read the data in the personal dosimeter when returning it, and store the data under the name of the corresponding staff member.

[0021] Furthermore, the personal dosimeter can locate and record the behavior trajectory of the staff in the work area and transmit it to the radiation dose analysis system.

[0022] Furthermore, the personal dosimeter includes a whole-body external radiation dose monitor, an eye external radiation dose monitor, and a hand external radiation dose monitor.

[0023] Furthermore, the S3 specifically includes the following steps:

[0024] S301: The radiation dose analysis system collects radiation environment monitoring information and animal feeding information, and calculates the environmental radiation dose based on the real-time information;

[0025] S302: The radiation dose analysis system collects radiation monitoring information and experimental operation information of staff, and calculates personal radiation dose based on real-time information;

[0026] S303: The radiation dose analysis system summarizes and analyzes the calculation results of the environmental radiation dose and the personal radiation dose to obtain a radiation dose variation curve.

[0027] Furthermore, the personal radiation dose includes three calculation methods: one is the cumulative radiation dose generated by the personal dosimeter from entering the experimental facility to leaving the experimental facility; the second is to obtain the time when the staff enters the working area through the position online monitoring module, and the monitoring results synchronously transmitted back by the personal dosimeter, and calculate the cumulative radiation dose of the staff entering the working area; the third is to obtain the working time of the staff at the operating post through the computer system of the experimental facility, and the monitoring results synchronously transmitted back by the personal dosimeter, and calculate the cumulative radiation dose of the staff at the operating post.

[0028] Furthermore, S4 includes environmental radiation dose warning and personal radiation dose warning, and the environmental radiation dose warning includes the following steps: setting a threshold interval [Z1, Z2] according to the dose limit, and comparing the environmental radiation dose result generated each time with the preset threshold interval; if the environmental radiation dose result is less than Z1, the current radiation environment is judged to be low risk and no warning is issued; if the environmental radiation dose result is greater than Z1 and less than Z2, the current radiation environment is judged to be medium risk and a first-level warning is issued; if the environmental radiation dose result is greater than Z2, the current radiation environment is judged to be high risk and a second-level warning is issued; the personal radiation dose warning includes the following steps: setting a whole-body radiation dose threshold interval [D1, D2] according to the dose limit, and the eye radiation Dose threshold interval [E1, E2], hand radiation dose threshold interval [F1, F2], the accumulated whole body radiation dose D, eye radiation dose E, hand radiation dose F are compared with the preset threshold intervals [D1, D2], [E1, E2], [F1, F2] respectively; if D<D1 and E<E1 and F<F1, the current personal radiation dose is judged to be low risk and no warning is issued; if D<D1 and E<E1 and F∈[F1, F2], D<D1 and E∈[E1, E2] and F<F1, D∈[D1, D2] and E<E1 and F<F1 are any of the following situations, the current personal radiation dose is judged to be medium-low risk and a first-level warning is issued; if D<D1 and E∈[E1, E2] and F∈

[0029] If any of the following occurs: D∈[D1,D2] and E∈[E1,E2] and F<F1, or D∈[D1,D2] and E<E1 and F∈[F1,F2], the personal radiation dose is judged to be medium risk and a level 2 warning is issued; if D∈[D1,D2] and E∈[E1,E2] and F∈[F1,F2] occurs, the personal radiation dose is judged to be medium-high risk and a level 3 warning is issued; if D>D1 or E>E1 or F>F1 occurs, the personal radiation dose is judged to be high risk and a level 4 warning is issued.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention can not only monitor the environmental radiation dose of the experimental facility in real time, but also obtain the personal cumulative dose of a single operation under three different conditions through the computer system of the experimental facility, and can summarize and analyze the radiation dose of the radioactive sources operated in the experimental facility, and obtain the changes in radiation dose under different radiation source operations, and can issue early warnings based on the environmental radiation dose and personal cumulative dose results.

[0032] 2. There are many variations in the use of monitoring instruments for environmental radiation monitoring. One is to arrange fixed monitoring instruments according to preset positions. The second is to arrange portable monitoring instruments according to the experimental objects involved. The third is to arrange portable monitoring instruments according to the operating positions and protective measures of the staff. Through the arrangement of various monitoring instruments, the radiation dose of the facility environment and operating positions can be fully and accurately monitored.

[0033] 3. The experimental facility computer system is connected to the radiation dose computer system to calculate personal radiation dose. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0036] like Figure 1 As shown, a specific embodiment of a method for monitoring radiation environment and personal dose of a radioactive biological experimental facility includes the following steps:

[0037] S1: Radiation dose monitors are arranged according to the operation positions involved in radioactive biological experiments. Radiation dose monitors include fixed radiation dose monitors, portable radiation dose monitors, and personal dose monitors to monitor the external radiation dose received by the staff during the experimental operation;

[0038] S2: When using a radioactive source, the staff shall record in the experimental facility computer system the start and end time of the operation, the type of experimental object operated, the specific activity of the radioactive source each time it is operated, the instrument used when using the radioactive source, and the specifications of the protective measures used;

[0039] S3: The data obtained in S1 and S2 are transmitted to the radiation dose analysis system, and the environmental radiation dose and personal radiation dose generated by the experimental operation in the corresponding operation area are summarized and analyzed according to the specific information of the experimental operation;

[0040] S4: Based on the analysis results, judgment is made by comparing with the preset radiation dose threshold range, and warnings of different levels are issued.

[0041] Among them, S1 specifically includes:

[0042] S101: According to the operation steps of radioactive biological experiments, the location of animal breeding and the location of personnel operation, set up fixed radiation dose monitors and mobile radiation dose monitors; the calculation formula for estimating the external radiation dose at different locations in the laboratory using fixed radiation dose monitors is:

[0043]

[0044] Among them, X j is the external radiation dose from the radiation source at the jth site in the working area, in Sv / h; X is the measurement value of the fixed radiation dose monitor, in Sv / h; R1 is the distance between the fixed radiation dose monitor and the radiation source, in m; R j The distance between the radiation source and the jth point in the working area, in meters.

[0045] S102: Install a portable radiation dose monitor based on the protective measures and the location of the operating posts. The computer records the correspondence between the installation position of the portable radiation dose monitor and the operating activity of the operating steps, the protective materials and protective effects of different parts of the protective measures, and the operating habits of the staff, and creates a file. In the subsequent experimental process, the computer retrieves the file based on the name of the staff, and sets up the position of the portable radiation dose monitor under different protective measures based on the file information.

[0046] S103: According to the activity of the radiation source operated by the staff and the distance between the staff and the radiation source, set up whole-body external radiation dose monitors, eye external radiation dose monitors, and hand external radiation dose monitors to establish a personal dose monitoring system; when entering the radioactive biological experimental facility, the staff enters the operating position to be entered and the type of operating radiation source, installs the dose monitor required to be worn in the system settings, issues the dose monitoring instrument, clears the data generated in the instrument, and records the monitoring instrument number; installs a communication module in the whole-body external radiation dose monitor, connects to the radiation dose analysis system, monitors the position of the staff online, locates the behavior trajectory of the staff in the work area, and transmits it to the radiation dose analysis system synchronously; accumulates the radiation dose obtained during the wearing process, reads the data in the dose monitor when returning it, and stores the data under the name of the corresponding staff member.

[0047] S3 specifically includes the following steps:

[0048] S301: The radiation dose analysis system collects radiation environment monitoring information and animal feeding information, and calculates the environmental radiation dose based on the real-time information;

[0049] S302: The radiation dose analysis system collects radiation monitoring information and experimental operation information of staff, and calculates personal radiation dose based on real-time information;

[0050] S303: The radiation dose analysis system summarizes and analyzes the calculation results of the environmental radiation dose and the personal radiation dose to obtain a radiation dose variation curve.

[0051] There are three calculation methods for personal radiation dose: one is the cumulative radiation dose generated by the personal dosimeter from the time of entering the experimental facility to the time of leaving the experimental facility; the second is to calculate the cumulative radiation dose of the staff entering the working area by obtaining the time when the staff enters the working area through the position online monitoring module, and the monitoring results synchronously transmitted back by the personal dosimeter; the third is to calculate the cumulative radiation dose of the staff at the operating post by obtaining the time when the staff works at the operating post through the computer system of the experimental facility, and the monitoring results synchronously transmitted back by the personal dosimeter.

[0052] S4 includes environmental radiation dose warning and personal radiation dose warning.

[0053] The environmental radiation dose warning includes the following steps: setting a threshold interval [Z1, Z2] according to the dose limit, and comparing the environmental radiation dose result generated each time with the preset threshold interval; if the environmental radiation dose result is less than Z1, the current radiation environment is judged to be low risk and no warning is issued; if the environmental radiation dose result is greater than Z1 and less than Z2, the current radiation environment is judged to be medium risk and a first-level warning is issued; if the environmental radiation dose result is greater than Z2, the current radiation environment is judged to be high risk and a second-level warning is issued;

[0054] The personal radiation dose warning includes the following steps: according to the dose limit, the whole body radiation dose threshold interval [D1, D2], the eye radiation dose threshold interval [E1, E2], and the hand radiation dose threshold interval [F1, F2] are set, and the accumulated whole body radiation dose D, eye radiation dose E, and hand radiation dose F are compared with the preset threshold intervals [D1, D2], [E1, E2], and [F1, F2] respectively; if D<D1 and E<E1 and F<F1, the current personal radiation dose is judged to be low risk and no warning is issued; if D<D1 and E<E1 and F∈[F1, F2], D<D1 and E∈[E1, E2] and F<F1, D∈[D1, D2] and E <E1 and F<F1, the current personal radiation dose is judged to be medium-low risk, and a first-level warning is issued; if any of D<D1 and E∈[E1,E2] and F∈[F1,F2], D∈[D1,D2] and E∈[E1,E2] and F<F1, D∈[D1,D2] and E<E1 and F∈[F1,F2] occurs, the personal radiation dose is judged to be medium risk, and a second-level warning is issued; if D∈[D1,D2] and E∈[E1,E2] and F∈[F1,F2] occurs, the personal radiation dose is judged to be medium-high risk, and a third-level warning is issued; if D>D1 or E>E1 or F>F1 occurs, the personal radiation dose is judged to be high risk, and a fourth-level warning is issued.

[0055] The above-mentioned embodiment can not only collect environmental and personal radiation doses in real time, but also calculate personal cumulative doses, issue early warnings based on the obtained radiation dose calculation results, and estimate the radiation doses of experimental animals, thus achieving multifunctionality and meeting the needs of radioactive biological experimental facilities for radiation dose monitoring of the environment, experimental subjects, and source-related personnel, and can better evaluate the safety of source-related operations, ensure the health and safety of personnel, and ensure the reliability and accuracy of experimental data.

[0056] The above embodiment can not only monitor the environmental radiation dose of the experimental facility in real time, but also obtain the personal cumulative dose of a single operation under three different conditions through the experimental facility computer system, and can summarize and analyze the radiation dose of the radioactive sources operated in the experimental facility, and obtain the changes in radiation dose under different radiation source operations, and finally issue an early warning based on the environmental radiation dose and personal cumulative dose results.

[0057] There are many variations in the use of the monitoring instruments used for environmental radiation monitoring in the above embodiments. One is to arrange fixed monitoring instruments according to preset positions, the second is to arrange portable monitoring instruments according to the experimental objects involved, and the third is to arrange portable monitoring instruments according to the operating positions and protective measures of the staff. Through the arrangement of various monitoring instruments, the radiation dose of the facility environment and the operating positions can be comprehensively and accurately monitored.

[0058] In the above embodiment, the experimental facility computer system is connected to the radiation dose analysis system to obtain information such as the start and end time of operations that may be involved when the staff uses the radiation source, the type of experimental object operated (involving animal species, cells, biological samples, etc.), the specific activity of the radiation source each time, the instruments used when using the radiation source (syringes, pipettes, etc.) and the specifications of the protective measures used, so as to calculate the personal radiation dose.

[0059] In the above embodiment, the obtained fixed radiation dose monitoring data is used to estimate the radiation dose at different sites in the laboratory; the radiation dose data of experimental animals is estimated based on the portable radiation dose monitoring data and the information obtained in the computer system of the experimental facility; the personal dose data of different operating positions is calculated based on the information obtained in the computer system of the experimental facility and the personal dose monitoring data, and the personal dose is accumulated. The obtained radiation dose data is compared with the preset threshold interval to timely warn the environment and personal radiation dose.

[0060] The above specific implementation methods are only for illustrating the technical concept and structural features of the present invention, and the purpose is to enable relevant persons familiar with this technology to implement it. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A method for monitoring radiation environment and personal dose in radioactive biological experimental facilities, characterized in that: The steps include: S1: Arrange radiation dose monitors according to the operation positions involved in the radioactive biological experiment. The radiation dose monitors include fixed radiation dose monitors, portable radiation dose monitors, and personal dose monitors to monitor the external radiation dose received by the staff during the experimental operation; S2: Record in the experimental facility computer system the start and end time of the operation, the type of experimental object operated, the specific activity of the radioactive source each time it is operated, the instrument used when using the radioactive source, and the specifications of the protective measures used; S3: The data obtained in S1 and S2 are transmitted to the radiation dose analysis system, and the environmental radiation dose and personal radiation dose generated by the experimental operation in the corresponding operation area are summarized and analyzed according to the specific information of the experimental operation; S4: Based on the analysis results, judgment is made by comparing with the preset radiation dose threshold range, and warnings of different levels are issued.

2. A method for monitoring radiation environment and personal dose of radioactive biological experimental facilities according to claim 1, characterized in that: The calculation formula for estimating the external radiation dose at different locations in the laboratory using the fixed radiation dose monitor is: Among them, X j is the external radiation dose from the radiation source at the jth site in the working area, in Sv / h; X is the measurement value of the fixed radiation dose monitor, in Sv / h; R1 is the distance between the fixed radiation dose monitor and the radiation source, in m; R j The distance between the radiation source and the jth point in the working area, in meters.

3. A method for monitoring radiation environment and personal dose of radioactive biological experimental facilities according to claim 1, characterized in that: The S1 specifically includes the following steps: S101: According to the operation steps of radioactive biological experiments, the location of animal breeding and the location of personnel operation, set up fixed radiation monitoring and measuring instruments and mobile radiation dose monitors; S102: Set up a portable radiation dose monitor according to the operation activity of the operation steps, the protective materials and protective effects of different parts of the protective measures, and the operating habits of the staff; S103: Set up personal dosimeters based on the activity of the radiation source operated by the staff and the distance between the staff and the radiation source.

4. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 3, characterized in that: S102 also includes recording by a computer the corresponding relationship between the installation position of the portable radiation dose monitor and the operating activity of the operating steps, the protective materials and protective effects of different parts of the protective measures, and the operating habits of the staff, and establishing a file; setting the position of the portable radiation dose monitor according to the file.

5. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 3, characterized in that: S103 also includes that before wearing the personal dosimeter, the staff must clear the data generated in the instrument and record the personal dosimeter number, read the data in the personal dosimeter when returning it, and store the data under the name of the corresponding staff member.

6. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 3, characterized in that: The personal dosimeter can locate and record the behavior trajectory of the staff in the work area and transmit it to the radiation dose analysis system.

7. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 1, characterized in that: The personal dosimeter includes a whole body external radiation dose monitor, an eye external radiation dose monitor, and a hand external radiation dose monitor.

8. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 7, characterized in that: The S3 specifically includes the following steps: S301: The radiation dose analysis system collects radiation environment monitoring information and animal feeding information, and calculates the environmental radiation dose based on the real-time information; S302: The radiation dose analysis system collects radiation monitoring information and experimental operation information of staff, and calculates personal radiation dose based on real-time information; S303: The radiation dose analysis system summarizes and analyzes the calculation results of the environmental radiation dose and the personal radiation dose to obtain a radiation dose variation curve.

9. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 8, characterized in that: The personal radiation dose includes three calculation methods: one is the cumulative radiation dose generated by the personal dosimeter from the time of entering the experimental facility to leaving the experimental facility; the second is to obtain the time when the staff enters the working area through the position online monitoring module, and the monitoring results synchronously transmitted back by the personal dosimeter, and calculate the cumulative radiation dose of the staff entering the working area; the third is to obtain the working time of the staff at the operating post through the computer system of the experimental facility, and the monitoring results synchronously transmitted back by the personal dosimeter, and calculate the cumulative radiation dose of the staff at the operating post.

10. A method for monitoring radiation environment and personal dose in a radioactive biological experimental facility according to claim 7, characterized in that: The S4 includes environmental radiation dose warning and personal radiation dose warning. The environmental radiation dose warning comprises the following steps: setting a threshold interval [Z1, Z2] according to the dose limit, comparing the environmental radiation dose result generated each time with the preset threshold interval; if the environmental radiation dose result is less than Z1, the current radiation environment is judged to be low risk and no warning is issued; If the environmental radiation dose result is greater than Z1 and less than Z2, the current radiation environment is judged to be medium risk and a first-level warning is issued; If the environmental radiation dose result is greater than Z2, the current radiation environment is judged to be high risk and a second-level warning is issued; The personal radiation dose warning comprises the following steps: according to the dose limit, a whole body radiation dose threshold interval [D1, D2], an eye radiation dose threshold interval [E1, E2], and a hand radiation dose threshold interval [F1, F2] are set, and the accumulated whole body radiation dose D, eye radiation dose E, and hand radiation dose F are compared with the preset threshold intervals [D1, D2], [E1, E2], and [F1, F2] respectively; if D<D1 and E<E1 and F<F1, the current personal radiation dose is judged to be low risk and no warning is issued; if D<D1, E<E1 and F<F1, the current personal radiation dose is judged to be low risk and no warning is issued; if D<D 1 and E<E1 and F∈[F1,F2], D<D1 and E∈[E1,E2] and F<F1, D∈[D1,D2] and E<E1 and F<F1, then the current personal radiation dose is judged to be medium-low risk and a first-level warning is issued; if any of D<D1 and E∈[E1,E2] and F∈[F1,F2], D∈[D1,D2] and E∈[E1,E2] and F<F1, D∈[D1,D2] and E<E1 and F∈[F1,F2] occurs, then the personal radiation dose is judged to be medium risk and a second-level warning is issued; If D∈[D1,D2] and E∈[E1,E2] and F∈[F1,F2] appear, the personal radiation dose is judged to be medium-high risk and a third-level warning is issued; if D>D1 or E>E1 or F>F1 appears, the personal radiation dose is judged to be high risk and a fourth-level warning is issued.

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