一种新型伤口污染检测仪探测窗防护装置的研制

Development of a new type of detection window protection device for wound contamination detector

为最大程度提高表面污染检测仪对α射线的探测效率,弥补检测仪防护措施不足等问题,设计一种新型伤口污染检测仪探测窗防护装置。该装置由防护膜和固定边框套筒组成,防护膜由透明平面迈拉膜制成,厚度≤2.5μm,形状为圆形,其直径与伤口辐射测量仪探头的探测面直径相互匹配,可与适配型号的伤口辐射测量仪探头配合使用。套筒设有封闭端和开放端,防护膜固定于套筒封闭端的内侧,套筒的开放端设有环形固定卡扣,可将套筒牢靠安装在一次性伤口辐射测量仪的探头上,安装后防护膜能够紧贴伤口辐射测量仪探头的探测面。选取2款常用伤口污染检测仪,在无膜防护、保鲜膜防护和新型防护装置3种防护状态下测量人工放射源,检验新型伤口污染检测仪探测窗防护装置的检测效率及可操作性。结果显示相较于传统的保鲜膜防护措施,研制的新型装置能够显著提高伤口放射性污染,尤其是α污染的探测效率,并可对仪器设备进行有效防护,提高伤口污染操作者的检测效率。

In order to maximize the detection efficiency of the surface contamination detector onαrays and make up for the problems of insufficient protective measures of the detector,a new detection window protection device for wound contamination detector was designed.The device was consisted of a protective film and a fixed frame sleeve.The protective film was made of a transparent flat Mylar film with a thickness of≤2.5μm and a circular shape.Its diameter matched the detection surface diameter of the wound radiation measuring instrument probe and can be used in combination with the appropriate model of wound radiation measuring instrument probe.The sleeve was provided with a closed end and an open end,the protective film was fixed on the inner side of the closed end of the sleeve,and the open end of the sleeve was provided with an annular fixing buckle,so that the sleeve can be firmly installed on the probe of the disposable wound radiation measuring instrument.After installation,the protective film can be closely attached to the detection surface of the probe of the wound radiation measuring instrument.Two commonly used contamination detectors were selected to measure the artificial radioactive sources under three protection conditions:film-free protection,plastic wrap protection and new protective devices,and the detection efficiency and operability of the detection window protection device of the new wound contamination detector were tested.The results showed that compared with the traditional protective measures of plastic wrap,the new device can significantly improve the detection efficiency of wound radioactive contamination,especiallyαcontamination,and effectively protect the instrument and equipment,and improve the detection efficiency of wound pollution operators.