A personal safety interlock system for cross-regional coordinated operation of accelerator clusters and beam transport lines arranged in partitions

Abstract

The present invention relates to the field of radiation protection in the utilization of nuclear technology. The invention relates to a personal safety interlock system for cross-region collaborative operation of accelerator groups and beam transport lines arranged in partitions, comprising a plurality of safety interlock systems for accelerator groups arranged in partitions, a plurality of cross-region beam transport lines and beam blocking systems thereof, a central control console and a server. The present invention allows the accelerator group in any partition and the cross-region beam transport lines arranged in the partition to emit beams simultaneously, and can ensure the safety of personnel during the collaborative operation of multiple partitions. During the collaborative operation of multiple partitions, if a personnel mis-irradiation accident or an interlocking failure occurs in any partition, the beam in the partition is immediately cut off, but the normal operation and personnel safety of other partitions are not affected. When any partition operates independently, no matter in a normal state or an accident state, the normal operation and personnel safety of other partitions are not affected.

Description

Technical Field

[0001] The present invention relates to the field of radiation protection in the utilization of nuclear technology, and in particular to a personal safety interlock system for cross-region collaborative operation of accelerator groups and beam transport lines arranged in partitions. Background Art

[0002] Ion accelerators, especially high-energy ion accelerators, will generate radiation hazards during operation. If the ion accelerator facility area is not controlled and protected, it will cause harm to the surrounding personnel and environment. During the operation of the ion accelerator, the hazards mainly include prompt radiation generated by ion loss during operation. An ionizing radiation field is formed at the ion loss point. Most of the radiation is shielded by an effective shield, but changes in operating conditions may also cause radiation to leak into the environment outside the shield. After the operation stops, the parts with more ion losses will form higher induced radioactivity, and air and cooling water with induced radioactivity will also be discharged, which poses potential hazards to personnel and the environment. Ensuring the personal safety and equipment safety of workers in a radiation environment and ensuring that the ion accelerator can be started and operated normally are the primary work goals of radiation protection workers.

[0003] For example, the invention disclosed in the publication (announcement) number CN115497214A relates to a personal safety interlock system for a scientific research accelerator, comprising: a number of interlock access control sub-control systems for monitoring and controlling the status of each interlock door in a control area, and collecting and verifying the information of people entering and leaving; a number of infrared video sub-control systems for collecting infrared images and counting the flow of people entering and leaving the corresponding control area at the entrances and exits; a number of dose monitoring sub-control systems for real-time monitoring of the radiation dose at preset monitoring points in the corresponding control area and the surrounding environment of the control area; a number of clearing and emergency stop sub-control systems for clearing and emergency stop; a number of sound and light alarm sub-control systems for sound and light alarm; a central management server system for receiving data and interlock signals sent by each sub-control system, and using different management modes to control the accelerators in each control area to achieve personal safety interlocking of personnel.

[0004] However, the above-mentioned system still has some shortcomings in the application of cross-regional coordinated operation of accelerator groups and beam transport lines in partitioned arrangement, which are mainly reflected in the following aspects:

[0005] 1. How to avoid accidental exposure of personnel caused by the coordinated operation of accelerator groups arranged in multiple zones and cross-regional beam transport lines;

[0006] 2. How to ensure that when an accident occurs in any partition or it operates independently, the normal operation of the adjacent partitions will not be affected. Summary of the invention

[0007] The object of the present invention is to provide a personal safety interlock system and an imaging method thereof for cross-region collaborative operation of accelerator groups and beam transport lines arranged in partitions, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above purpose, a personal safety interlock system for cross-region collaborative operation of accelerator groups and beam transport lines arranged in partitions is provided, comprising:

[0009] The accelerator group safety interlock system arranged in each partition is used to manage the safety of personnel in different working stages of the accelerator group in each independent control area, such as preparing to emit beams, emitting beams, and stopping beams;

[0010] Each of the cross-region beam transport lines and the beam blocking system thereof is used to provide beams to adjacent control areas during multi-region associated operation to achieve the coordinated operation of multiple beams, and to block cross-region beam transport when a personnel mis-illumination accident or interlocking failure occurs in any associated area;

[0011] The central control console is used to arrange the accelerator group and beam transport line in different areas for cross-regional coordinated operation and independent operation mode switching. It has the functions of confirmation before beam emission, emergency stop under emergency conditions and terminal display.

[0012] The server is connected to the safety interlocking system of the accelerator group arranged in each partition, the cross-regional beam transport line and its beam blocking system, and the central control console through interfaces. It is used to receive the interlocking signals and data of the subsystems or equipment in each control area, and control the accelerator group and beam transport line arranged in each partition according to the preset radiation safety workflow.

[0013] Preferably: adjacent partitions are physically isolated by concrete radiation protection walls.

[0014] Preferably: the beam transport line is a vacuum pipe for transporting particle beams, a plurality of beam transport lines are led out from an accelerator in a central partition, and pass through concrete radiation protection walls of two adjacent partitions to transport the beams across regions; the beam blocking system is arranged on the vacuum pipe at the through-wall hole, and is used to block the particle beam in the vacuum pipe in the central partition.

[0015] Preferably: the safety interlock systems of the accelerator groups arranged in each partition are of the same composition, and all include: a clearing and patrol interlock system, an emergency stop interlock system, a radiation dose interlock system, a door machine interlock system and an alarm system. The clearing and patrol interlock system is a number of clearing buttons arranged in the control area of ​​each accelerator group according to a predetermined clearing route. The emergency stop interlock system is a number of emergency stop buttons arranged in the control area of ​​each accelerator group according to the needs of scientific experiments or operation and maintenance. The radiation dose interlock system is used to monitor the radiation dose in the radiation site. The door machine interlock system includes protective doors, personnel entry and exit management boxes, emergency switches in the door, and redundant switches for the protective door status arranged at the entrances and exits of the mazes of each partition. The alarm system includes a working status display screen and sound and light alarm lights, which are arranged at the entrances of the personnel entry and exit passages of each partition.

[0016] Preferably, the door machine interlocking system further comprises infrared sensing equipment and video surveillance arranged in the passage for personnel to enter and exit the control area.

[0017] Preferably, the radiation dose interlock system comprises radiation monitoring devices arranged on the inner and outer walls of the control area, and the inner and outer radiation monitoring devices are respectively set with threshold values.

[0018] Preferably: the beam blocking system is a beam plug and a Faraday cage installed on the cross-regional beam transport line, and sends a working status signal (open or closed) to the server, which is a key interlocking control signal in the cross-regional collaborative operation mode; under any fault condition such as power failure, the beam plug and the Faraday cage will automatically close to block the passage of the beam and be locked, and any cross-regional beam transport line is provided with a beam plug and a Faraday cage at the same time.

[0019] Preferably: the central control console is arranged in the central control room, including a workbench and a terminal display device, and the server has a redundant hot-switch programmable logic controller respectively connected to the input and output interfaces of the safety interlocking devices of each control area.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Allowing the accelerator group in any zone to emit beams simultaneously with the cross-zone beam transport line arranged in that zone, which can ensure the safety of personnel during the coordinated operation of multiple zones;

[0022] 2. When multiple zones are in coordinated operation, if a personnel accident or interlocking failure occurs in any zone, the beam in that zone shall be cut off immediately, but the normal operation and personnel safety of other zones shall not be affected;

[0023] 3. When any partition operates independently, whether in normal or accident status, it will not affect the normal work and personnel safety of other areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an architecture diagram of a personal safety interlock system proposed by the present invention, in which accelerator groups and beam transport lines are arranged in partitions and operate in a cross-regional collaborative manner.

[0025] Figure 2 This is a structural control logic diagram of a personal safety interlock system proposed by the present invention, in which accelerator groups and beam transport lines are arranged in partitions and operate in a cross-regional collaborative manner. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example

[0028] See also Figure 1 - Figure 2 , the figure shows a preferred embodiment of the present invention, a personal safety interlock system for cross-regional coordinated operation of accelerator groups and beam transport lines arranged in partitions, including accelerator group safety interlock systems arranged in each partition, which are used to manage the safety of personnel in different working stages such as preparing to emit beams, emitting beams, and stopping beams in each independent control area, and each cross-regional beam transport line and its beam blocking system are used to provide beams to adjacent control areas during multi-zone associated operation to achieve multi-beam collaborative work, and to block cross-regional beam transport lines when a personnel accident or interlock failure occurs in any associated area. The central control console is used for the cross-regional coordinated operation of accelerator groups and beam transport lines in partitioned arrangements and the switching of their independent operation modes. It has the functions of confirmation before beam emission, emergency stop under emergency conditions and terminal display. The server is connected to the safety interlocking system of the accelerator group arranged in each partition, the cross-regional beam transport line and its beam blocking system, and the central control console through interfaces. It is used to receive the interlocking signals and data of the subsystems or equipment in each control area, and control the accelerator groups and beam transport lines arranged in the partitions according to the preset radiation safety workflow.

[0029] In this embodiment, the accelerator group safety interlock system arranged in each partition is divided according to the design requirements and spatial layout of each scientific research terminal. Concrete radiation protection walls are used to physically isolate adjacent partitions to ensure that the radiation particles generated when the accelerator in any partition is in operation can reduce the radiation hazard to the staff in the adjacent area to a reasonable and feasible level as low as possible.

[0030] In this embodiment, the beam transport line is a vacuum pipe for transporting particle beams. According to needs, a number of beam transport lines can be led out from an accelerator in the central partition, and pass through the concrete radiation protection walls of two adjacent partitions to realize cross-regional beam transportation; the beam blocking system is arranged on the vacuum pipe at the wall hole, and is used to block the particle beam in the vacuum pipe in the central partition to avoid radiation hazards to the staff in the adjacent partitions.

[0031] In this embodiment, the accelerator group safety interlock systems arranged in each partition have the same composition, including: a clearing patrol interlock system, an emergency stop interlock system, a radiation dose interlock system, a door machine interlock system, and an alarm system; the clearing patrol interlock system is a number of clearing buttons arranged in the control area of ​​each accelerator group according to a predetermined clearing route, which is used for the staff to enter the control area and press the clearing buttons in sequence according to the predetermined route before the accelerator is ready to emit a beam, and send a clearing signal to the server while sending a local sound and light alarm to realize the personnel clearing function; the emergency stop interlock system is a number of emergency stop buttons arranged in the control area of ​​each accelerator group according to the needs of scientific experiments or operation and maintenance, which is used for the staff who are left behind in the control area to press in an emergency, and send a local sound and light alarm to the server while sending an emergency stop signal to immediately cut off the accelerator beam in the area to ensure safety. The radiation dose interlock system is used to monitor the radiation dose in the radiation site. When the radiation is abnormal, a sound and light alarm is issued locally and a dose abnormality signal is sent to the server. The door machine interlock system includes protective doors, personnel access management boxes, emergency switches inside the doors and redundant switches for protective door status arranged at the entrances and exits of the maze in each partition. It is used to open and close the protective doors under normal operation or accident conditions, and send a protective door opening and closing status signal to the server as a key signal for interlock control before the accelerator supplies the beam. That is, when the accelerator supplies the beam, the protective door must be in a closed state, otherwise, the beam supply cannot be started. The alarm system includes a working status display screen and a sound and light alarm light, which are arranged at the entrance of the personnel entrance and exit channels of each partition to display the working status of the accelerator group in each partition. When the beam is being supplied, the sound and light alarm light lights up, flashes and beeps to warn personnel to leave.

[0032] Furthermore, the door machine interlocking system has redundant safety, that is, infrared sensing equipment and video surveillance are arranged in the passages where people enter and exit the control area. During the beam supply process, when it is sensed or observed that someone is passing by, the beam in the control area is immediately cut off and the beam blocking system on the cross-area beam transport line is closed to prevent the beam from entering the control area.

[0033] Furthermore, the functions of the personnel access management box include classified management of personnel rights in and out of the control area, allowing local opening and closing of protective doors under authorization conditions, recording the total number of people entering the control area, etc., and sending a personnel clearing signal in the control area to the server as a key signal for the interlocking control before the accelerator beam supply. That is, when the accelerator beam is supplied, the personnel in the control area must be cleared, otherwise, the beam supply cannot be started; the classified management of personnel rights means that one of the necessary conditions for ordinary staff to swipe ordinary cards to enter and exit the control area is that the administrator swipes the administrator card to authorize personnel to enter and exit the management box, and the prerequisite for returning the administrator card is that all ordinary cards on the personnel access management box are returned.

[0034] Furthermore, the field clearing patrol interlocking system has a field clearing anti-following function, that is, when the staff enters the control area and presses the first field clearing button to start clearing the field, the protective door at the entrance and exit of the corresponding control area maze is automatically closed to prevent personnel from entering the control area from the outside, and they cannot enter by swiping a card through the personnel access management box. At this time, the personnel in the control area presses the emergency door opening button inside the door, opens the protective door and evacuates the control area. After a delay of several seconds, the protective door automatically closes. To ensure the safe passage of personnel, an infrared anti-pinch device is installed at the protective door opening. At the same time, the field clearing patrol interlocking system has a voice broadcast function, that is, when the staff enters the control area and presses the first field clearing button to start clearing the field, the voice equipment set in the control area will cyclically broadcast "clearing the field, please leave immediately", urging the staff in the field to evacuate the scene as soon as possible. If the staff does not press the field clearing buttons in sequence according to the set field clearing route, or the field clearing buttons fail, or the emergency stop button is pressed, or the protective door is opened from the outside, the voice equipment immediately cyclically broadcasts "field clearing failed, please clear the field again", reminding the staff to clear the field again.

[0035] In this embodiment, the radiation dose interlock system includes radiation monitoring equipment arranged on the inner and outer walls of the control area. If the radiation dose rate measured by the inner radiation monitoring equipment exceeds the set threshold, the protective door cannot be opened from the outside. If the radiation dose rate measured by the outer radiation monitoring equipment exceeds the set threshold, the accelerator beam in the radiation abnormality area is immediately cut off. The threshold is set according to national standards and the residence requirements of each zone.

[0036] Furthermore, after any control area stops supplying beams, the necessary conditions for opening the protective door from the outside are that the radiation dose rate is lower than the set threshold, the ventilation delay ends, and the administrator card is successfully swiped on the personnel entry and exit management box.

[0037] Furthermore, the beam blocking system is a beam plug and a Faraday cage installed on the cross-regional beam transport line, and sends a working status signal (open or closed) to the server, which is a key interlocking control signal in the cross-regional collaborative operation mode; the beam plug and the Faraday cage are fail-safe, that is, under any fault condition such as power failure, the beam plug and the Faraday cage will automatically close to block the passage of the beam and be locked to ensure the safety of personnel. In addition, a beam plug and a Faraday cage are simultaneously provided on any cross-regional beam transport line to ensure that the interlocking action of blocking the beam is redundant and safe.

[0038] In this embodiment, the central control console is arranged in the central control room, including a workbench and a terminal display device. According to the number of partitioned accelerator groups and the need for switching the operation mode, the workbench is equipped with several operation mode switching buttons, several pre-beam confirmation buttons, several emergency stop buttons and a card reader that can realize the human-computer interaction function. Before operating the operation mode switching button or the pre-beam confirmation button each time, the on-duty personnel in the central control room must swipe the card reader with the administrator card to authorize the switching of the required control area operation mode or the pre-beam confirmation function, otherwise the operation is invalid. After the operation stops, the workbench will withdraw the authorization after a delay of several seconds, and the operation button is invalid at this time; pressing the emergency stop button under any conditions can cut off the accelerator beam of the corresponding control area. In order to avoid unnecessary cutting of the accelerator beam due to misoperation, an anti-misoperation structure needs to be installed on the emergency stop button; the terminal display device provides a good human-computer interaction interface, which allows the staff to conveniently and intuitively view the working status, data display and alarm information of the accelerator groups, beam transport lines, safety interlocking devices, etc. in each radiation control area, so that the staff can respond and operate quickly and accurately.

[0039] Furthermore, the premise for the beam-out confirmation button to be effective is that the site is cleared, the protective door is closed, the administrator card is returned, and the emergency stop button is not pressed.

[0040] In this embodiment, under the condition of independent beam supply of multiple partitioned accelerator groups, the beam plug and Faraday cage on the corresponding cross-regional beam transport line can be opened by pressing the corresponding operation mode switching button, and the independent beam supply operation mode of the corresponding control area can be switched to the associated beam supply operation mode with one key; similarly, under the condition of cross-regional coordinated and associated beam supply of multiple partitioned accelerator groups and beam transport lines, the beam plug and Faraday cage on the corresponding cross-regional beam transport line can be closed by pressing the corresponding operation mode switching button, and the associated beam supply operation mode of the corresponding control area can be switched to the independent beam supply operation mode with one key.

[0041] Furthermore, the emergency stop button, the pre-beam confirmation button or the operation mode switching button all adopt a failure protection design, that is, after failure, they must be manually reset on site to allow the accelerator group in the selected control area to be enabled and emit beams, or to successfully switch the cross-regional collaborative operation mode of the partitioned accelerator group and the beam transport line.

[0042] In this embodiment, under the conditions of cross-regional coordinated beam supply by accelerator groups and beam transport lines arranged in multiple partitions, if an emergency occurs in any partition, such as personnel mistakenly staying behind or entering by mistake, resulting in the emergency stop button being pressed, the protective door being opened, or the emergency door opening button being pressed, etc., which destroys the interlocking events, the beam of the partition is immediately cut off, and the beam plugs and Faraday cages on the beam transport lines entering the partition are immediately closed to block the passage of the beam.

[0043] Furthermore, the server has a redundant hot-swappable programmable logic controller and input and output interfaces connected to the safety interlock devices in each control area. The logic control, data transmission and interaction of each functional module of the safety interlock system run on it, and it is the control center of the entire system.

[0044] The above content further describes the present invention in detail in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be deemed to belong to the protection scope determined by the claims submitted for the present invention.

Claims

1. A personal safety interlock system for cross-regional coordinated operation of accelerator groups and beam transport lines arranged in partitions, comprising several accelerator group safety interlock systems arranged in partitions, several cross-regional beam transport lines and their beam blocking systems, a central control console and a server, characterized in that: The accelerator group safety interlock system arranged in each partition is used to manage the safety of personnel in different working stages of the accelerator group preparing to emit beams, emitting beams, and stopping beams in each independent control area; Each of the cross-region beam transport lines and the beam blocking system thereof is used to provide beams to adjacent control areas during multi-region associated operation to achieve the coordinated operation of multiple beams, and to block cross-region beam transport when a personnel mis-illumination accident or interlocking failure occurs in any associated area; The central control console is used to arrange the accelerator group and beam transport line in different areas for cross-regional coordinated operation and independent operation mode switching. It has the functions of confirmation before beam emission, emergency stop under emergency conditions and terminal display. The server is connected to the safety interlocking system of the accelerator group arranged in each partition, the cross-regional beam transport line and its beam blocking system, and the central control console through interfaces, and is used to receive interlocking signals and data from the subsystems or equipment in each control area, and control the accelerator group and beam transport line arranged in each partition according to the preset radiation safety workflow; The safety interlock systems of the accelerator groups arranged in each partition are of the same composition, including: a clearing and patrolling interlocking system, an emergency stop interlocking system, a radiation dose interlocking system, a door machine interlocking system and an alarm system. The clearing and patrolling interlocking system is a number of clearing buttons arranged in the control area of ​​each accelerator group according to the predetermined clearing route. The emergency stop interlocking system is a number of emergency stop buttons arranged in the control area of ​​each accelerator group according to the needs of scientific experiments or operation and maintenance. The radiation dose interlocking system is used to monitor the radiation dose in the radiation site. The door machine interlocking system includes protective doors arranged at the entrances and exits of the maze of each partition, personnel entry and exit management boxes, emergency switches in the doors, and redundant switches for the status of protective doors. The alarm system includes a working status display screen and sound and light alarm lights, which are arranged at the entrances of the personnel access passages of each partition. The door machine interlocking system also includes channels in the personnel access control area. Arrange infrared sensing equipment and video surveillance, radiation dose interlock system, including radiation monitoring equipment arranged on the inner and outer walls of the control area, and the inner and outer radiation monitoring equipment are respectively set with thresholds. The beam blocking system is the beam plug and Faraday cage installed on the cross-regional beam transport line, and sends a working status signal to the server, which is the key interlock control signal in the cross-regional collaborative operation mode; under any fault condition, the beam plug and Faraday cage will automatically close to block the passage of the beam and be locked. Any cross-regional beam transport line is equipped with a beam plug and a Faraday cage. The central control console is arranged in the central control room, including a workbench and a terminal display device. The server has a redundant hot-swappable programmable logic controller that is connected to the input and output interfaces of the safety interlocking equipment of each control area.

2. According to claim 1, a personal safety interlock system for cross-regional coordinated operation of accelerator groups and beam transport lines arranged in zones, characterized in that: Concrete radiation protection walls are used to physically isolate adjacent partitions.

3. According to claim 2, a personal safety interlock system for cross-regional coordinated operation of accelerator groups and beam transport lines arranged in zones is characterized by: The beam transport line is a vacuum pipe for transporting particle beams. Several beam transport lines are led out from an accelerator in the central partition and pass through the concrete radiation protection walls of two adjacent partitions to transport the beams across regions. The beam blocking system is arranged on the vacuum pipe at the wall hole to block the particle beam in the vacuum pipe in the central partition.

Images