Regional management method and management and control device for collective dose control of nuclear power plant

Abstract

The invention belongs to the technical field of radioactive dose control, and particularly relates to a regional management method and management and control device for collective dose control of a nuclear power plant, and the method comprises the steps: S1, carrying out the plan management and control of the operation before the regional maintenance operation; s2, performing radiation management and control on a radiation field of the operation area; s3, performing operation management and control on the maintenance operation; s4, performing personnel management and control in the operation implementation process; and S5, performing item management and control in the operation implementation process. The method provided by the invention can effectively solve the problem that the collective dose control of the nuclear power plant is limited due to the fact that the conventional collective dose control of the nuclear power plant is mainly point-oriented and locally passive protection and cannot realize dynamic and systematic active protection and management and control from the global aspect.

Description

Technical Field

[0001] The present invention belongs to the technical field of radioactive dose control, and in particular relates to a regionalized management method and a control device for collective dose control in a nuclear power plant. Background Art

[0002] A nuclear power plant is a device that can generate energy through a self-sustaining chain fission nuclear reaction. The fuel used is radioactive materials such as fissile uranium. A nuclear power plant is generally divided into two parts: a nuclear island (including reactor devices and primary circuit systems) that uses nuclear fission to generate steam, and a conventional island (including steam turbine generator systems) that uses steam to generate electricity. The main types of reactors in nuclear power plants include pressurized water reactors, boiling water reactors, and high-temperature gas-cooled reactors. The way they generate energy is through nuclear fission reactions, so radioactivity exists in the primary circuit systems of nuclear power plants. During the operation and maintenance of nuclear power plants, workers who come into contact with the equipment in the primary circuit system will be exposed to ionizing radiation. In the industry, the amount of ionizing radiation energy received by workers per unit time is called a personal dose, and the sum of personal doses received by a specific group over a period of time is called a collective dose. Since ionizing radiation is harmful to the human body, the collective dose of power plant workers needs to be controlled. At present, the principle generally adopted for collective dose control in nuclear power plants is the radiation protection optimization principle (also known as the ALARA principle) recommended by the International Commission on Radiological Protection (ICRP) and adopted by many international organizations such as the International Atomic Energy Agency (IAEA), namely: "After taking into account economic and social factors, ensure that the size of individual doses, the number of people exposed, and the possible exposure that may not be received are all kept as low as reasonably achievable." Therefore, collective dose has been used as one of the safety status indicators of nuclear power plants, and it is also one of the performance indicators of the World Association of Nuclear Operators (WANO). It reflects the comprehensive management level of operation, maintenance and safety of nuclear power units.

[0003] At present, when nuclear power plants conduct collective dose control, they mainly formulate protection measures and control plans around a specific task, and mainly focus on shielding the established radiation field and protecting the personal external exposure of on-site workers. This belongs to work process control and has point-like and local defects and deficiencies. It is a passive management method and cannot achieve dynamic and systematic active protection and control from a global perspective, thus bringing limitations to the collective dose control of nuclear power plants. Summary of the invention

[0004] The purpose of the present invention is to provide a regionalized management method and control device for collective dose control of nuclear power plants. The method can effectively solve the problem that the existing collective dose control of nuclear power plants is mainly point-based and locally passively protected, and dynamic and systematic active protection and control cannot be achieved from a global perspective, thus bringing limitations to the collective dose control of nuclear power plants.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A regionalized management method for collective dose control in a nuclear power plant, the method comprising:

[0007] S1: Before carrying out regional maintenance work, plan and control the work;

[0008] S2: Conduct radiation control on the radiation field in the working area;

[0009] S3: Conduct operation control on maintenance operations;

[0010] S4: Conduct personnel control during the implementation of the operation;

[0011] S5: Carry out item control during the implementation of the operation.

[0012] The plan control includes: analysis and prediction of radiation impacts on spatial area operation items and time windows, operation implementation steps, mutual interference of operations, etc., pre-simulation of important risk operations, pre-intervention of cross-operation practices, optimization of operation sequence, and introduction of protection plans into operation plans.

[0013] The radiation control includes: pre-identification of on-site radiation sources, system source control through the formulation, implementation, dynamic tracking control and evaluation of active and passive protection plans such as flushing, purification, container filling and shielding, dynamic regional management of on-site radiation status, and minimizing the radiation impact of the on-site environment on the operating personnel.

[0014] The dynamic regionalized management includes: on-site monitoring and dynamic tracking and control.

[0015] The operation control includes: controlling the entire process of preparation, implementation, closing and experience feedback of maintenance operations, verifying operating conditions on site based on procedure documents and operation plans, supervising the implementation of plans during the operation, and providing experience feedback to guide implementation in combination with historical maintenance situations.

[0016] The personnel control includes: work authorization and qualification verification of operating personnel, and then improving work efficiency and reducing collective dosage at work through on-site headcount control and behavior supervision.

[0017] The item control includes: managing the storage, transfer, use and radiation level control of relevant items during the implementation of on-site maintenance operations, and reducing the collective dose of the operation by reducing the radiation level on site.

[0018] The management of the storage, transfer, use and radiation level control of relevant items during the implementation of on-site maintenance work includes: planning the storage of relevant items during the implementation of on-site maintenance work according to the radiation level, and decontaminating, repairing, temporarily storing and transferring high-dose rate equipment during the maintenance process.

[0019] A regional control device for collective dose control during overhaul of a nuclear power plant, the device comprising: a collection module, a locking module, a communication module, a cloud server, and a user terminal; the collection module triggers an entry operation request, collects request information, and transmits the request information to the cloud server; the cloud server compares and analyzes the request information to determine whether the request information belongs to information in a pre-stored database; if the request information belongs to information in the pre-stored database, the cloud server sends an instruction to open the locking module of the regional control device, allowing the requester to enter the control area to perform operations; at the same time, an instruction is sent to establish a communication connection between the regional control device communication module and the user terminal, and the communication module sends information to the user terminal for supervising and controlling the operation behavior of personnel and items; if the request information does not belong to information in the pre-stored database, the cloud server sends an instruction to keep the locking state of the locking module of the regional control device, and the requester cannot enter the control area to perform operations.

[0020] The request information includes: the time point of entry request, facial features of the requester, area control device number and location information.

[0021] The beneficial technical effects of the present invention are:

[0022] 1. The regionalized management method for collective dose control of nuclear power plants provided by the present invention takes planning as a guide, measures as the core, considers active protection at the front end and passive protection at the back end, implements control according to standardized processes, and comprehensively considers planning, radiation, operations, personnel, and items from the two dimensions of time and space to form a systematic and scientific management method. This management method can effectively improve the radiation intrinsic safety and personnel protection of nuclear power plant maintenance operations, and has a significant effect in the control of collective dose indicators of nuclear power plants.

[0023] 2. The regionalized management method for collective dose control of nuclear power plants provided by the present invention runs through the entire process of preparation, implementation and completion of maintenance operations of nuclear power plants, and transforms from the previous point-to-point single-item control method to a full-process management method, which can promote the standardization and standardization of radiation safety supervision of nuclear power plants and form an active protection closed-loop management model. While achieving the optimal control of the collective dose of overhaul, it promotes the common development of related fields of power plants, such as minimization of radioactive waste, standardization of maintenance operations, optimization of overhaul schedules, excellence in safety management, etc., to achieve the ultimate goal of improving the intrinsic radiation safety of power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a regionalized management method for collective dose control in a nuclear power plant provided by the present invention;

[0025] Figure 2 A method flow chart of a regional control device for collective dose control in a nuclear power plant provided by the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, the present invention provides a regional management method for collective dose control in a nuclear power plant, which specifically includes the following steps:

[0028] S1: Before carrying out regional maintenance work 1, plan and control the work 2

[0029] When the maintenance department of a nuclear power plant receives a task to carry out maintenance work in a certain area1, the supervisory department first plans and controls the work2, first estimates the radiation impact of the spatial area operation items and time windows, operation implementation steps, and the mutual interference of operations21, conducts pre-simulation for important risk operations, pre-intervene in cross-operation practices, optimizes the operation sequence22, and adds a protection plan to the operation plan23;

[0030] S2: Radiation control of radiation field in the operation area 3

[0031] Subsequently, radiation control is carried out on the radiation field in the operating area3. First, the radiation source on site is pre-identified, and system source term control is carried out through the formulation, implementation, dynamic tracking control and evaluation of active protection plans such as flushing, purification, container filling, and shielding31. The radiation status of the maintenance site is monitored on site32, and dynamic tracking control33 is carried out at the same time to minimize the radiation impact of the on-site environment on the operating personnel;

[0032] S3: Operation control of maintenance work 4

[0033] Then, the operation control is carried out4, and the whole process of preparation, implementation, closing and experience feedback of the maintenance operation is controlled. Based on the procedure documents and operation plan, the operation conditions are verified on site41, and the implementation of the plan is supervised during the operation42. At the same time, experience feedback is carried out to guide implementation based on historical maintenance conditions43;

[0034] S4: Personnel control during operation implementation5

[0035] During the operation, personnel control is carried out5. First, the work authorization and qualification check of the operators are carried out51. Then, the collective dose of the operation is reduced through the control of the number of people on the operation site52 and behavior supervision53.

[0036] S5: Control items during operation 6

[0037] During the implementation of the operation, item control is also carried out6. First, the storage plan of relevant items during the implementation of on-site maintenance operations is carried out according to the radiation level61. Then, during the maintenance process, the high-dose rate equipment is decontaminated and repaired62, and temporarily stored and transferred63 to reduce the collective dose of the operation by reducing the radiation level of the site.

[0038] The present invention also provides a regional control device for collective dose control during overhaul of a nuclear power plant, the device comprising: a collection module, a locking module, a communication module, a cloud server, and a user terminal.

[0039] The collection module triggers an entry operation request, collects the request information, and transmits the request information to the cloud server; the cloud server compares and analyzes the request information to determine whether the request information belongs to the information in the pre-stored database; if the request information belongs to the information in the pre-stored database, the cloud server sends an instruction to open the area control device locking module, allowing the requester to enter the controlled area to perform operations; at the same time, an instruction is sent to establish a communication connection between the area control device communication module and the user terminal, and the communication module sends information to the user terminal for supervision and control of personnel work behaviors and items; if the request information does not belong to the information in the pre-stored database, the cloud server sends an instruction to keep the area control device locking module locked, and the requester cannot enter the controlled area to perform operations.

[0040] The request information includes: the time point of entry request, facial features of the requester, area control device number and location information.

[0041] The regional control device for collective dose control of nuclear power plant overhaul provided by the present invention is used to perform regional control, such as Figure 2 As shown, the specific steps include:

[0042] Step S101: After the above step S2, the site has demarcated the control area according to the radiation level, and the regional control device has been deployed on site. The maintenance area is divided into independent control areas through the physical fence boundary. The site staff triggers the entry operation request through the camera on the regional control device, and the regional control device collects the facial features of the requester;

[0043] Step S102: The area control device associates the time point of the entry request, the facial image of the requester, the area control device number and the location information, and transmits them to the cloud server via wired or wireless communication. The server compares the received facial image with the facial image library of the personnel pre-stored in the cloud server to determine whether it belongs to the information in the pre-stored image library;

[0044] If not, step S106 is executed, the locking module of the area control device remains locked, and the requester cannot enter the control area to perform operations;

[0045] Step S103: If the requested facial image belongs to the image information pre-stored in the server, the server sends an instruction to open the locking module of the area control device to allow the requester to enter the control area to perform operations;

[0046] Step S104: After the requester enters the control area to perform operations, the communication module of the area control device establishes a communication connection with the user terminal;

[0047] Step S105: The communication module of the area control device sends information to the user terminal to remind the applicant that he has entered the control area for operation, so as to supervise the applicant to carry out subsequent operation behavior supervision and item control.

[0048] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A regionalized management method for collective dose control in nuclear power plants, characterized in that: The method comprises: S1: Before carrying out regional maintenance work, plan and control the work; S2: Conduct radiation control on the radiation field in the working area; S3: Conduct operation control on maintenance operations; S4: Conduct personnel control during the implementation of the operation; S5: Carry out item control during the implementation of the operation.

2. A regionalized management method for collective dose control in a nuclear power plant according to claim 1, characterized in that: The plan control includes: analysis and prediction of radiation impacts on spatial area operation items and time windows, operation implementation steps, mutual interference of operations, etc., pre-simulation of important risk operations, pre-intervention of cross-operation practices, optimization of operation sequence, and introduction of protection plans into operation plans.

3. A regionalized management method for collective dose control in a nuclear power plant according to claim 1, characterized in that: The radiation control includes: pre-identification of on-site radiation sources, system source control through the formulation, implementation, dynamic tracking control and evaluation of active and passive protection plans such as flushing, purification, container filling and shielding, dynamic regional management of on-site radiation status, and minimizing the radiation impact of the on-site environment on the operating personnel.

4. A regionalized management method for collective dose control in a nuclear power plant according to claim 3, characterized in that: The dynamic regionalized management includes: on-site monitoring and dynamic tracking and control.

5. A regionalized management method for collective dose control in a nuclear power plant according to claim 1, characterized in that: The operation control includes: controlling the entire process of preparation, implementation, closing and experience feedback of maintenance operations, verifying operating conditions on site based on procedure documents and operation plans, supervising the implementation of plans during the operation, and providing experience feedback to guide implementation in combination with historical maintenance situations.

6. A regionalized management method for collective dose control in a nuclear power plant according to claim 1, characterized in that: The personnel control includes: work authorization and qualification verification of operating personnel, and then improving work efficiency and reducing collective dosage at work through on-site headcount control and behavior supervision.

7. A regionalized management method for collective dose control in a nuclear power plant according to claim 1, characterized in that: The item control includes: managing the storage, transfer, use and radiation level control of relevant items during the implementation of on-site maintenance operations, and reducing the collective dose of the operation by reducing the radiation level on site.

8. A regionalized management method for collective dose control in a nuclear power plant according to claim 7, characterized in that: The management of the storage, transfer, use and radiation level control of relevant items during the implementation of on-site maintenance work includes: planning the storage of relevant items during the implementation of on-site maintenance work according to the radiation level, and decontaminating, repairing, temporarily storing and transferring high-dose rate equipment during the maintenance process.

9. A regional control device for collective dose control of nuclear power plant overhaul, used for the regional management method for collective dose control of nuclear power plant according to claim 1, characterized in that: The device includes: a collection module, a locking module, a communication module, a cloud server, and a user terminal; the collection module triggers an entry operation request, collects request information, and transmits the request information to the cloud server; the cloud server compares and analyzes the request information to determine whether the request information belongs to the information in the pre-stored database; if the request information belongs to the information in the pre-stored database, the cloud server sends an instruction to open the locking module of the area control device, allowing the applicant to enter the controlled area to work; at the same time, an instruction is sent to establish a communication connection between the communication module of the area control device and the user terminal, and the communication module sends information to the user terminal for supervising and controlling the work behavior of personnel and items; if the request information does not belong to the information in the pre-stored database, the cloud server sends an instruction to keep the locking state of the locking module of the area control device, and the applicant cannot enter the controlled area to work.

10. A regional control device for collective dose control during overhaul of a nuclear power plant according to claim 9, characterized in that: The request information includes: the time point of entry request, facial features of the requester, area control device number and location information.

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