BJ-6B加速器维修保养回顾分析

目的 研究BJ-6B加速器维修、保养方法.方法 回顾分析2002-2009年BJ-6B加速器故障现象、原因、处理方法记录资料.结果 记录的231次故障中运动控制故障64次(其中手控盒部分故障20次),高压脉冲调制器报故障41次,36次报反峰过荷,5次报充电过荷,均整器故障7次,机械故障21次,数显故障20次.其余故障出现在磁控管灯丝电源、钛泵电源、光学指示系统、剂量监测系统等部位.运动控制故障率最高,其次是高压调制器部分、机械部分.结论 BJ-6B加速器技术比较成熟,故障率较低.为了提高正常开机率,医院应重视物理工程人员培训,提高其业务水平;工程师应熟读图纸,按时检查线路以及机器元部件,根据维修经验提前购置可能要更换的元件.机房湿度、温度必须控制好.随时观察出束时机器相关参数,避免打火对磁控管、加速管等珍贵元件的损害.

Retrospective analysis on the maintenance of BJ-6B accelerator

Objective To study the maintenance of BJ-6B accelerator. Methods Analyzed retrospectively the maintenance record of BJ-6B accelerator, including phenomena, causes and handle from 2002 to 2009. Results In 231 records, there were motion-controlling 64, hand-controlling-pendant 20.modulator 41, anti-peak overload 36, charging overload 5. Flatness 7, mechanical 21, digital-display 20,others lie in magnetron power, water-cooling system, light-indicator system, dose-monitor system and wedge system. Motion-controlling system is the highest among those, followed by high-voltage modulator and mechanical system. Conclusions The down time for BJ-6B accelerator is low because of its perfect technology. To keep its stability in clinic, the hospital authorities should emphasize training of engineer for improving their maintenance ability. The engineer must be familiar with the circuit diagram, check the electric wire and machine unit on time and prepare unit for maintenance. The temperature and humidity in machine house must be controlled on demand. The engineer must pay attention to machine parameters when beam is on for avoiding the spark's damage to magnetron and accelerating-tube