Personnel admission judgment method for personal dose management system software

Abstract

The invention belongs to the technical field of dose management, and particularly relates to a personal dose management system software personnel admission judgment method. The internal and external irradiation dose data are integrated, and when a person wearing the dosimeter enters and exits the control area, the exit reader automatically uploads the external irradiation data to the system. The system supports personnel and RWP information management, information is added in a single entry mode, an Excel batch import mode or an interface butt joint mode, and parameters such as an access state and a dose limit value are configured. A person needs to pass dual verification before entering the control area, wherein the dosimeter needs to meet system registration, non-control state and effective verification. A dose limit value adopts a default or self-defined threshold value, and after multi-level verification, a system side is allowed to enter an operation area to form a complete radiation safety management and control closed loop. The system has the advantages that the system judges the dosimeter information, the personnel information and the RWP information, the control area is allowed to enter when it is ensured that the dosimeter information and the personnel information are registration information in the system, and the safety and reliability of the system are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dose management, and in particular relates to a personnel access determination method for personal dose management system software. Background Art

[0002] GB 18871-2002, Basic Standard for Ionizing Radiation Protection and Radiation Source Safety, stipulates that the annual average effective dose for a person over five consecutive years (but no retrospective averaging is allowed) must not exceed 20 mSv. Personal dose management systems are primarily used for personal dose management and access control in controlled areas. However, the development of personal dose management systems in China is severely lagging, and the methods for determining whether a person enters a controlled area are also lagging behind.

[0003] The existing invention patent "A method and system for controlling the working dose limit of nuclear power plant personnel" describes the dose limit to be considered when writing the alarm threshold of the dosimeter. It only involves the system and the dosimeter. Its disadvantage is that it only determines whether the dose limit meets the conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a personnel access determination method for personal dose management system software, which can solve the conditions and the order logic of conditions that need to be determined when personnel enter the control area, provide feedback information to the reader in a timely manner, and improve the response efficiency of the system.

[0005] The technical solution of the present invention is as follows: A method for determining personnel access to a personal dose management system software comprises the following steps:

[0006] Step 1: Input personnel internal exposure dose into the personal dose management system;

[0007] Step 2: When entering the controlled area, the personnel wear a dosimeter. When leaving the controlled area, they place the dosimeter into the slot of the exit reader. The reader transmits the personnel's external radiation dose to the personal dose system for statistical analysis.

[0008] Step 3: Enter the dosimeter information into the personal dose system;

[0009] Step 4: The personal dose management system supports the addition of individual personnel information, as well as batch import through Excel files and interfaces. It also supports the setting of access status, dose limits, and access control conditions for personnel information.

[0010] Step 5: The personal dose management system supports the single addition of RWP information, as well as the batch import of RWP information through Excel files and interfaces. It also supports the import and manual configuration of RWP authorization information.

[0011] Step 6: The personal dose management system supports the entry of personnel's initial dose, including the dose for the past twelve months, the dose for the past five years, and the dose for five years ago;

[0012] Step 7: The dose limit determined when a person enters the controlled area is the default dose limit or a custom dose limit. The personal dose management system supports custom dose limits.

[0013] Step 8: When personnel enter the controlled area, they must first determine the dosimeter they are using. The dosimeter must be registered in the system, not in the controlled area, and within the verification validity period.

[0014] Step 9: When a person enters the controlled area, the dosimeter is used to determine the person's information. The person's information must meet the following criteria: the person is registered in the system, is not in the controlled area, is within the validity period, is not in a prohibited access state, meets the access control conditions, and has a dose margin.

[0015] Step 10: When a person enters the controlled area, he / she passes the judgment of the dosimeter and personnel information. When the system is in the management RWP mode, the person authorizes the RWP, and the RWP is in a usable state, the person is allowed to select the corresponding RWP to enter the controlled area, passing all the judgments of the person entering the controlled area.

[0016] In the step 1, the internal radiation dose of personnel is input into the personal dose management system through batch import or communication interface.

[0017] In step 3, the information of the dosimeter is entered individually or imported in batches through an Excel file.

[0018] The information of the dosimeter includes the dosimeter number, dosimeter model, dosimeter calibration time, and the next calibration time of the dosimeter.

[0019] The access control conditions in step 4 include WBC monitoring validity period, passing the physical examination, and passing the examination.

[0020] The step 9 includes the following steps:

[0021] Step 91: Daily dose limit judgment: the personnel daily dose limit DD1, the personnel daily cumulative dose value CD1, if DD1-CD1>0, the daily dose is within the limit; otherwise, the daily dose exceeds the limit and is not allowed to enter the control area;

[0022] Step 92: Determine if the seven-day dose exceeds the limit. The seven-day dose limit for the individual is DD7, and the cumulative dose value for the past seven days is CD7. If DD7-CD7>0, the seven-day dose is within the limit. Otherwise, the individual is not allowed to enter the control area.

[0023] Step 93: Determine if the 30-day dose limit is exceeded. The 30-day dose limit value DD30 and the cumulative dose value CD30 of the personnel in the past 30 days are used. If DD30-CD30>0, the 30-day dose limit is within the limit. Otherwise, the 30-day dose limit is exceeded and the person is not allowed to enter the control area.

[0024] Step 94: Monthly dose limit judgment: monthly dose limit MD1, cumulative dose value MCD1 for the current month. If the person has an initial dose ID1 for the current month, then MD1-MCD1-ID1>0, and the monthly dose is within the limit. Otherwise, the person is not allowed to enter the control area. If there is no initial dose for the current month, the initial dose is not considered.

[0025] Step 95: Determine if the three-month dose exceeds the limit. The three-month dose limit MD3 and the cumulative dose value MCD3 of the personnel in the past three months are used. If the personnel has initial doses ID1, ID2, and ID3 in the past three months, and MD3-MCD3-ID1-ID2-ID3>0, then the three-month dose is within the limit. Otherwise, if the three-month dose exceeds the limit, the personnel is not allowed to enter the control area. If there is no initial dose in any month in the past three months, the initial dose is not considered.

[0026] Step 96: Determine if the annual dose exceeds the limit. The annual dose limit for the individual is YD1, the minimum dose margin for the system is SD, and the individual's current annual cumulative dose is YCD1. If the individual has an initial dose for each month of the current year, and the initial doses of these months are added together to form IDn, then if YD1-YCD1-IDn-SD>0, then the annual dose is within the limit. Otherwise, if the annual dose exceeds the limit, the individual is not allowed to enter the control area. If there is no initial dose for any month of the current year, the initial dose is not considered.

[0027] Step 97: Determine if the five-year dose exceeds the limit. The five-year dose limit value YD5 and the cumulative dose value YCD5 for the past five years are used. If the person has an initial dose in the past five years, these initial doses are accumulated to form IDn. If YD5-YCD5-IDn>0, then the five-year dose is within the limit. Otherwise, if the five-year dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose in the past five years, the initial dose is not considered.

[0028] Step 98: Determine if the lifetime dose exceeds the limit. The lifetime dose limit value of the personnel is YDAll, and the cumulative dose value of all personnel is YCDAll. If the personnel has an initial dose, these initial doses are accumulated as IDAll. Then YDAll-YCDAll-IDAll>0, then the lifetime dose is within the limit. Otherwise, if the lifetime dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose, the initial dose is not considered.

[0029] The beneficial effects of the present invention are:

[0030] 1. The personal dose management system's method for determining whether a person enters the controlled area involves the system's judgment of dosimeter information, personnel information, and RWP information. Entry to the controlled area is permitted only when both the dosimeter and personnel information are registered in the system, improving the system's safety and reliability. Multiple judgment conditions are sorted out, priorities are determined, and timely feedback is given to readers for conditions that are not met, improving the system's response efficiency and enhancing user experience.

[0031] 2. The method for judging whether personnel enter the controlled area of ​​the personal dose management system involves judging access control conditions and dose margins, which ensures the occupational health and safety of radiation workers and reduces the risk of health damage caused by radioactive factors. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to specific embodiments.

[0033] The personal dose management system in this invention primarily records the external exposure dose of radiation workers and is one of the most important means for nuclear power plants to implement personnel dose control and access control for radiation control areas. The personal dose management system software includes six functional modules: worker information management, RWP information management, dose data statistical analysis, reader device management, basic parameter management, and system management. It also supports setting personnel dose limits within the personal dose management system.

[0034] The purpose of the present invention is to provide a personnel access determination method for personal dose management system software, which can solve the conditions and the order logic of conditions that need to be determined when personnel enter the control area, provide feedback information to the reader in a timely manner, and improve the response efficiency of the system.

[0035] A method for determining personnel access to a personal dose management system software comprises the following steps:

[0036] Step 1: Input personnel internal radiation dose into the personal dose management system through batch import or communication interface;

[0037] Step 2: Personnel entering the controlled area must wear a dosimeter. When leaving the controlled area, they need to place the dosimeter into the slot of the exit reader. The reader will transmit the personnel's external radiation dose to the personal dose system software for statistical analysis.

[0038] Step 3: The personal dose system can input the information of the dosimeter individually, and can import the dose information in batches through Excel files, including the dosimeter number, dosimeter model, dosimeter calibration time, and the next dosimeter calibration time;

[0039] Step 4: The personal dose management system supports the addition of individual personnel information, as well as batch import through Excel files and interfaces. It also supports the setting of personnel information access status, dose limits, and access control conditions (WBC monitoring validity period, physical examination pass, and examination pass).

[0040] Step 5: The personal dose management system supports the single addition of RWP (Radiation Work Permit) information, as well as the batch import of RWP information through Excel files and interfaces. It also supports the import and manual configuration of RWP authorization information.

[0041] Step 6: The personal dose management system supports the entry of personnel's initial dose (dose data absorbed in other nuclear power plants before entering this nuclear power system), including the rolling dose for the past twelve months, the dose for the past five years, and the dose five years ago;

[0042] Step 7: The dose limit for personnel entering the controlled area can be the default dose limit or a custom dose limit. The personal dose management system supports custom dose limits.

[0043] Step 8: When a person enters the controlled area, the dosimeter used must first be judged. The dosimeter must be registered in the system, not in the controlled area (a dosimeter in the controlled area indicates that a person has entered the controlled area using the dosimeter and cannot re-enter the area. Re-entry is allowed only after leaving the controlled area), and within the verification validity period.

[0044] Step 9: When a person enters the controlled area, he / she must first be judged by the dosimeter, and then the personnel information must be judged. The personnel information must meet the following requirements: the person is registered in the system, the person is not in the controlled area, the person is within the validity period, the person is not in a prohibited access state, the person meets the access control conditions, and the person has a dose margin;

[0045] The step 9 includes the following steps:

[0046] Step 91: Daily dose limit judgment: the personnel daily dose limit DD1, the personnel daily cumulative dose value CD1, if DD1-CD1>0, the daily dose is within the limit; otherwise, the daily dose exceeds the limit and the person is not allowed to enter the control area;

[0047] Step 92: Determine if the seven-day dose exceeds the limit. The seven-day dose limit for the individual is DD7, and the cumulative dose value for the past seven days is CD7. If DD7-CD7>0, the seven-day dose is within the limit. Otherwise, the individual is not allowed to enter the control area.

[0048] Step 93: Determine if the 30-day dose limit is exceeded. The 30-day dose limit value DD30 and the cumulative dose value CD30 of the personnel in the past 30 days are used. If DD30-CD30>0, the 30-day dose limit is within the limit. Otherwise, the 30-day dose limit is exceeded and the person is not allowed to enter the control area.

[0049] Step 94: Monthly dose limit judgment: monthly dose limit MD1, cumulative dose value MCD1 for the current month. If the person has an initial dose ID1 for the current month, then MD1-MCD1-ID1>0, and the monthly dose is within the limit. Otherwise, the person is not allowed to enter the control area. If there is no initial dose for the current month, the initial dose is not considered.

[0050] Step 95: Determine if the three-month dose exceeds the limit. The three-month dose limit MD3 and the cumulative dose value MCD3 for the personnel in the past three months are used. If the personnel has initial doses ID1, ID2, and ID3 in the past three months, and MD3-MCD3-ID1-ID2-ID3>0, then the three-month dose is within the limit. Otherwise, if the three-month dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose in any month in the past three months, the initial dose is not considered.

[0051] Step 96: Determine if the annual dose exceeds the limit. The annual dose limit for the individual is YD1, the minimum dose margin for the system is SD, and the individual's current annual cumulative dose is YCD1. If the individual has an initial dose for each month of the current year, and the initial doses of these months are added together to form IDn, then if YD1-YCD1-IDn-SD>0, then the annual dose is within the limit. Otherwise, if the annual dose exceeds the limit, the individual is not allowed to enter the control area. If there is no initial dose for any month of the current year, the initial dose is not considered.

[0052] Step 97: Determine if the five-year dose exceeds the limit. The five-year dose limit value YD5 and the cumulative dose value YCD5 for the past five years are used. If the person has an initial dose in the past five years, these initial doses are accumulated to form IDn. If YD5-YCD5-IDn>0, then the five-year dose is within the limit. Otherwise, if the five-year dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose in the past five years, the initial dose is not considered.

[0053] Step 98: Determine if the lifetime dose exceeds the limit. The lifetime dose limit value of the personnel is YDAll, and the cumulative dose value of all personnel is YCDAll. If the personnel has an initial dose, these initial doses are accumulated as IDAll. Then YDAll-YCDAll-IDAll>0, then the lifetime dose is within the limit. Otherwise, if the lifetime dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose, the initial dose is not considered.

[0054] Step 10: When a person enters the controlled area, he / she passes the judgment of the dosimeter and personnel information. When the system is in the management RWP mode, the person authorizes the RWP, and the RWP is in a usable state, the person is allowed to select the corresponding RWP to enter the controlled area, passing all the judgments of the person entering the controlled area.

[0055] Note: The dose limit mentioned above generally refers to HP(10). This method includes but is not limited to HP(10), and can also be used for dose limits such as HP(0.07). The specific dose to be measured is determined based on the source term of the nuclear power plant or nuclear facility. The dose types that can be measured by the dosimeter are HP10G, HP10N, and HP(0.07). There is such a relationship: HP(10) = HP10G + HP10N, that is, HP(10) (cumulative dose) is obtained by adding HP10G (gamma cumulative dose) to HP10N (neutron cumulative dose). HP(0.07) is the radiation dose equivalent received by organs or tissues at a depth of 0.07 mm below the body surface, and is usually used to assess radiation exposure to the skin. HP(10) measures the dose at a depth of 10 mm below the body surface and is suitable for whole-body effective dose assessment.

[0056] Example

[0057] A method for determining personnel access to the personal dose management system software is as follows:

[0058] 1. Personnel carry dosimeters and prepare to enter the control area;

[0059] 2. The person places the dosimeter into the slot of the reader. The reader reads the dosimeter number and sends it to the personal dose management system software through the WebService interface.

[0060] 3. The personal dose management system software queries multiple data tables based on the dosimeter number and returns fields such as whether the dosimeter has been registered with the system, whether the dosimeter is in the control area, and whether the dosimeter is within the verification validity period to the reader through the WebService interface;

[0061] 4. The reader makes a judgment based on the dosimeter-related information returned by the personal dose management system software. If all the conditions are met, such as the dosimeter is registered in the system, is not in the control area, and is within the verification validity period, the judgment of personnel information is entered;

[0062] 5. The person swipes the card or enters the personnel number, and the reader sends the personnel number to the personal dose management system software through the WebService interface;

[0063] 6. The personal dose management system software queries multiple data tables based on the personnel number and makes judgments according to the following logical order: whether the personnel is a registered personnel in the system, whether the personnel is already in the control area, whether the personnel is within the validity period, whether the personnel is in a prohibited access state, whether the personnel meets the access control conditions, whether the personnel access control conditions are within the validity period, whether the personnel's daily dose exceeds the limit, whether the personnel's seven-day dose exceeds the limit, whether the personnel's thirty-day dose exceeds the limit, whether the personnel's monthly dose exceeds the limit, whether the personnel's three-month dose exceeds the limit, whether the personnel's annual dose exceeds the limit, whether the personnel's five-year dose exceeds the limit, and whether the personnel's lifetime dose exceeds the limit. As long as one of the conditions is not met, the system software will return the information of prohibited access and the reason for refusing entry into the control area through the WebService interface. The reason for rejection will be displayed on the display of the reader to inform the personnel. The information of refusing entry into the control area will also be recorded in the rejection menu of the system software to prompt the administrator to handle it. If all conditions are met, the system software will return the basic information of the personnel to the reader through the WebService interface for the personnel to check.

[0064] 7. The reader displays the personnel information sent by the personal dose management system software. After the personnel clicks to confirm, the reader again sends the personnel number to the personal dose management system software through the WebService interface to obtain the RWP information of the personnel;

[0065] 8. After receiving the personnel number, the personal dose management system software calls the corresponding interface function to query the RWP number and related dose data authorized to the personnel, and returns it to the reader through the WebService interface;

[0066] 9. The reader receives the RWP number related information sent by the personal dose management system software. If there is an RWP number, all RWP numbers and name information will be displayed. After the personnel clicks on the RWP to be used, they enter the control area; if there is no RWP number, it will be displayed that there is no authorized RWP and the personnel are not allowed to enter the control area.

Claims

1. A method for determining personnel access to a personal dose management system software, characterized in that: The following steps are involved: Step 1: Input personnel internal exposure dose into the personal dose management system; Step 2: When entering the controlled area, the personnel wear a dosimeter. When leaving the controlled area, they place the dosimeter into the slot of the exit reader. The reader transmits the personnel's external radiation dose to the personal dose system for statistical analysis. Step 3: Enter the dosimeter information into the personal dose system; Step 4: The personal dose management system supports the addition of individual personnel information, as well as batch import through Excel files and interfaces. It also supports the setting of access status, dose limits, and access control conditions for personnel information. Step 5: The personal dose management system supports the single addition of RWP information, as well as the batch import of RWP information through Excel files and interfaces. It also supports the import and manual configuration of RWP authorization information. Step 6: The personal dose management system supports the entry of personnel's initial dose, including the dose for the past twelve months, the dose for the past five years, and the dose for five years ago; Step 7: The dose limit determined when a person enters the controlled area is the default dose limit or a custom dose limit. The personal dose management system supports custom dose limits. Step 8: When personnel enter the controlled area, they must first determine the dosimeter they are using. The dosimeter must be registered in the system, not in the controlled area, and within the verification validity period. Step 9: When a person enters the controlled area, the dosimeter is used to determine the person's information. The person's information must meet the following criteria: the person is registered in the system, is not in the controlled area, is within the validity period, is not in a prohibited access state, meets the access control conditions, and has a dose margin. Step 10: When a person enters the controlled area, he / she passes the judgment of the dosimeter and personnel information. When the system is in the management RWP mode, the person authorizes the RWP, and the RWP is in a usable state, the person is allowed to select the corresponding RWP to enter the controlled area, passing all the judgments of the person entering the controlled area.

2. A method for determining personnel access to a personal dose management system software according to claim 1, characterized in that: In the step 1, the internal radiation dose of personnel is input into the personal dose management system through batch import or communication interface.

3. A method for determining personnel access to a personal dose management system software according to claim 1, characterized in that: In step 3, the information of the dosimeter is entered individually or imported in batches through an Excel file.

4. A method for determining personnel access to a personal dose management system software according to claim 3, characterized in that: The information of the dosimeter includes the dosimeter number, dosimeter model, dosimeter calibration time, and the next calibration time of the dosimeter.

5. A method for determining personnel access to a personal dose management system software according to claim 1, characterized in that: The access control conditions in step 4 include WBC monitoring validity period, passing the physical examination, and passing the examination.

6. A method for determining personnel access to a personal dose management system software according to claim 1, characterized in that: The step 9 includes the following steps: Step 91: Daily dose limit judgment: the personnel daily dose limit DD1, the personnel daily cumulative dose value CD1, if DD1-CD1>0, the daily dose is within the limit; otherwise, the daily dose exceeds the limit and is not allowed to enter the control area; Step 92: Determine if the seven-day dose exceeds the limit. The seven-day dose limit for the individual is DD7, and the cumulative dose value for the past seven days is CD7. If DD7-CD7>0, the seven-day dose is within the limit. Otherwise, the individual is not allowed to enter the control area. Step 93: Determine if the 30-day dose limit is exceeded. The 30-day dose limit value DD30 and the cumulative dose value CD30 of the personnel in the past 30 days are used. If DD30-CD30>0, the 30-day dose limit is within the limit. Otherwise, the 30-day dose limit is exceeded and the person is not allowed to enter the control area. Step 94: Monthly dose limit judgment: monthly dose limit MD1, cumulative dose value MCD1 for the current month. If the person has an initial dose ID1 for the current month, then MD1-MCD1-ID1>0, and the monthly dose is within the limit. Otherwise, the person is not allowed to enter the control area. If there is no initial dose for the current month, the initial dose is not considered. Step 95: Determine if the three-month dose exceeds the limit. The three-month dose limit MD3 and the cumulative dose value MCD3 of the personnel in the past three months are used. If the personnel has initial doses ID1, ID2, and ID3 in the past three months, and MD3-MCD3-ID1-ID2-ID3>0, then the three-month dose is within the limit. Otherwise, if the three-month dose exceeds the limit, the personnel is not allowed to enter the control area. If there is no initial dose in any month in the past three months, the initial dose is not considered. Step 96: Determine if the annual dose exceeds the limit. The annual dose limit for the individual is YD1, the minimum dose margin for the system is SD, and the individual's current annual cumulative dose is YCD1. If the individual has an initial dose for each month of the current year, and the initial doses of these months are added together to form IDn, then if YD1-YCD1-IDn-SD>0, then the annual dose is within the limit. Otherwise, if the annual dose exceeds the limit, the individual is not allowed to enter the control area. If there is no initial dose for any month of the current year, the initial dose is not considered. Step 97: Determine if the five-year dose exceeds the limit. The five-year dose limit for personnel is YD5, and the cumulative dose value for personnel in the past five years is YCD5. If the personnel has an initial dose in the past five years, these initial doses are accumulated as IDn. If YD5-YCD5-IDn>0, then the five-year dose is within the limit. Otherwise, if the five-year dose exceeds the limit, the personnel is not allowed to enter the control area. If there is no initial dose in the past five years, the initial dose is not considered.

7. A method for determining personnel access to a personal dose management system software according to claim 6, characterized in that: The step 9 includes the following steps: Step 98: Determine if the lifetime dose exceeds the limit. The lifetime dose limit value of the personnel is YDAll, and the cumulative dose value of all personnel is YCDAll. If the personnel has an initial dose, these initial doses are accumulated as IDAll. Then YDAll-YCDAll-IDAll>0, then the lifetime dose is within the limit. Otherwise, if the lifetime dose exceeds the limit, the person is not allowed to enter the control area. If there is no initial dose, the initial dose is not considered.