The ratio of a protective materials and construction technology, material ratio (by weight): 1, wall protection materials and cement 5: 1; 2, ground protection materials and cement 4: 1; 3, protective materials and cement ceiling of 3: 1 ; 4, can be spread on the ground to do the other side after the protective layer of compacted layers; one, the construction process: 1, protective materials and cement mix well (not allowed doped with other materials); 2, each having a thickness of not more than 15mm, After a layer of compacted, at 6 to 7 percent dry add a touch of the second layer, and so on; if the roof construction first with 109 rubber and cement paste and stir into the door on Radiological Protection, thrown in the roof surface design expert on Radiological Protection, to be 6 ~ 70% dry and then wipe a layer of protective material, a maximum of two. 3, the wall the last time at 3: 1 Ingredients radiological protection engineering experts, many times to mention light compaction; NOTE: To many times each compaction times, no holes, no cracks, ensure quality protection. Control measures 3 radiation management measures 3.1 3.1.1 In order to facilitate the management, will be engaged in radiation work place units into three zones: A control area: radiation exposure among workers in continuous operation by the year may exceed the value of life three tenths area should be marked in red. B supervised areas: radiation exposure to personnel in which the continuous period of one year subject to generally no more than three tenths of years the value of radiological protection, and may exceed one tenth of the area should be marked with orange. C non-restricted zone: radiation personnel in which continuous period of one year subject to the general area of ??not more than one tenth of the value of life, should be marked with green. Radiological protection professional enterprise | Radiological Protection Engineering (certified) | Radiological Protection provided by Ericsson Hebei Medical Engineering Limited. Ericsson Hebei Medical Engineering Co., Ltd. (www.hslixin.com) Hebei Hengshui, a leader in medical device manufacturing equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hebei Ericsson leadership with the staff warmly welcome all inquiries negotiations to create a better future Hebei Ericsson.