May cause increased levels of natural background radiation limits the practice of 2.5.4 to natural background radiation may cause increased levels of all practice, radiation protective coatings, should be optimized in order to give legitimacy and post-approval, may establish, if necessary stage management limits. Exceed the limits of the existing practice, should take timely remedial measures; irradiation may arise in the future should be designed in the planning and decision-making stage, radiation protection, on the development of the appropriate limit according to the principle of optimization. Categories radiation working conditions: For ease of administration, the working conditions of radiation into three types: A Species Working conditions: effective radiation dose equivalent a year may exceed 15mSv (1.5rem). For such working conditions of staff, to have personal dose monitoring, radiation protection door, for places to have regular monitoring, the establishment of individual staff radiation dose and workplace monitoring files. B kinds of work conditions: effective dose equivalent radiation is less likely than a year 15mSv (1.5rem). But there may be more than 5mSv (0.5rem). For such places working conditions, to be monitored on a regular basis. To make a personal dose monitoring and establish individual doses to file. Gamma Working conditions: effective dose equivalent radiation is less likely than a year 5mSv (0.5rem) working conditions for this place, can be monitored according to needs, and recorded. . Radiation protection, Hebei Ericsson, radiation protection door provided Lixin from Hebei Medical Engineering Limited. Radiation protection, Hebei Ericsson, Ericsson radiation protection door Hebei Medical Engineering Co., Ltd. (www.hslixin.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel picture on this page or to obtain the latest Information, Contact: Li Hongli.