某公司在扬子巴斯夫二期扩建工程无损检测项目的实施中,业主经常要求在白天对焊口进行检测,由于检测区域内人员众多,施工现场复杂,为保证公众的健康安全,必须将辐射防护距离降到5m以内。根据国家相关的辐射安全标准,以及扬巴业主的安全规定,如果采用常规X光或γ源进行射线检测, During the implementation of a non-destructive testing project of the second phase of the expansion project of the second phase of BASF in Yangzhou, the owner often requires the testing of the welding mouth during the day. Due to the large number of personnel in the testing area and the complicated construction site, in order to ensure the public’s health and safety, the radiation protection distance Down to 5m or less. According to the relevant national radiation safety standards, as well as the safety requirements of the owners of Yangba, if conventional X-ray or γ-ray sources are used for radiation detection,