本工作在现场调研的基础上,对近年来国内发生的几起辐照装置卡源故障发生的原因进行了分析,对辐照装置可能发生卡源故障的原因归纳如下。1辐照装置固有隐患辐照装置设施牢固可靠是安全运行的基础。本文列举了可能造成卡源故障的固有隐患:1)源升降钢丝绳起毛、松弛、断裂、脱槽;2)护源罩或防撞杆强度不够、结构不合理,或未有源架护 On the basis of field investigation, this paper analyzed the causes of the occurrence of card source faults in several irradiation units in China in recent years, and summarized the possible causes of card source faults in the irradiation unit as follows. 1, the inherent hidden dangers of irradiation facilities Irradiation facilities, solid and reliable is the basis for safe operation. This article lists the inherent hidden dangers that may cause a card source failure: 1) Source lifting wire rope fluffing, slackening, fracture, groove off; 2) Envelope or impact bar strength is not enough, the structure is not reasonable,