Control measures 3.1 Management measures 3 to radiation 3.1.1 For ease of administration, the sites involved in radiation work unit is divided into three zones: A control area: radiation staff working continuously in a year may exceed the number of years by value three tenths of area should be marked in red. B supervised areas: radiation personnel in which continuous period of one year subject to not more than three tenths life values, and may exceed one-tenth of the area should be marked in orange. C non-restricted zone: radiation exposure to personnel in which the continuous period of one year subject to not more than one tenth of the area of ??radiation protection door how much the value of a life, shall be marked with green. DSA DSA room room wall sand wall paint protection barium, barium sand paint protection lead equivalent thickness to meet the protection requirements. Outer paving 30 × 40 × 0.6mm galvanized square tube dragon skeleton radiation plate base, ivory aluminum plate attached to the surface, and for reinforcement fixing treatment, radiation protection, DSA chamber walls, the top surface must be holistic construction process to ensure that the overall tightness, follow the selection did not produce dust, no dust, corrosion, mildew proof, easy to clean, nice and in accordance with the general principles of fire protection. Medical radiation protective lead doors | radiation protection | Hebei Hebei Ericsson Ericsson is provided by medical Engineering Co. Ericsson Hebei Medical Engineering Co., Ltd. (www.hslixin.com) strong, credible, Hengshui in Hebei medical device manufacturing equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hebei Ericsson and you hand into the brilliant, for a better future!