面向加速器中子源的辐射安全联锁系统设计  

Design of radiation safety interlocking system for accelerator neutron source

作　　者：梁君筱 梁立振 圣宗强 熊绪文 李帅 胡阳 LIANG Junxiao;LIANG Lizhen;SHENG Zongqiang;XIONG Xuwen;LI Shuai;HU Yang(School of Mechanics and Photoelectric Physics,Anhui University of Science and Technology,Huainan 232001,China;Energy Research Institute,Hefei National Science Center,Hefei 230001,China;Anhui Antianlixin Engineering Management Co.,Ltd,Hefei 230000,China)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001 [2]合肥综合性国家科学中心能源研究院(安徽省能源实验室),合肥230001 [3]安徽安天利信工程管理股份有限公司,合肥230000

出　　处：《哈尔滨商业大学学报(自然科学版)》2025年第2期192-198,共7页Journal of Harbin University of Commerce:Natural Sciences Edition

基　　金：合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(21KZS208、21KZS202);国家自然科学基金青年项目(12305200)。

摘　　要：中子发生器在运行过程中,会产生大量的中子与γ射线.为了防止有人员误入辐射区域,建立了基于冗余控制技术的人员辐射安全联锁系统.采用分布式架构设计了中子源辐射安全联锁系统.基于可编程逻辑控制器PLC与LD(Ladder Diagram)实现了现场传感器的控制,并通过以太网通信实现人机交流.采用C#语言开发了辐射安全联锁监控程序,实现现场加速器、各传感器的实时监测,并根据实现信号判断是否可以启动或关闭加速器以保证人员安全.设计的辐射安全联锁系统可以通过清场在实验前防止有闲散人员在现场逗留,实验中遇到紧急事件切断中子源束流,实验后在辐射剂量低于指定剂量前不允许人员进入,保障工作人员的人身安全,运行稳定可靠.During the operation of a neutron generator,a large number of neutrons and gamma rays were generated.To prevent people from straying into the radiation area,a personnel radiation safety interlock system based on redundant control technology was established.The main operational risks of the neutron experiment base were analyzed,and the corresponding safety monitoring and protection mechanisms were implemented.The neutron source radiation safety interlock system was designed with a distributed architecture,consisting of field sensors,an interlock controller(PLC),and a host computer.The field sensors included a clearance alarm device,a master control switch,a neutron gamma dosimeter,a face recognition device,an electromagnetic door lock,an infrared sensor,a status indicator,an LED display,a high voltage trigger,a voice/monitoring device,and an interlock control cabinet.The field sensor was controlled based on the programmable logic controller(PLC)S7-200 and LAD language,and man-machine communication was realized through Ethernet communication.The radiation safety interlock monitoring program was developed using C#language to enable real-time monitoring of the on-site accelerator and each sensor.The system judged whether the accelerator could be started or closed based on the signals to ensure personnel safety.The designed radiation safety interlock system prevented idle personnel from staying on the site before the experiment by clearing the site,cut off the neutron source beam in the event of an emergency during the experiment,and forbade personnel from entering until the radiation dose was lower than the specified limit after the experiment.This effectively guaranteed the personal safety of the staff and enabled stable and reliable operation.The stability of the radiation safety interlock system was improved by adding the guiding concept of redundancy design.After continuous field testing,the system ran stably in accordance with the expected function.

关 键 词：中子源 实时监控 PLC 冗余控制 辐射安全联锁系统 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]