GBZ/T 250-2014 Translated English of Chinese Standard. (GBZT 250-2014, GBZ/T250-2014, GBZT250-2014): Radiation shielding specification for room of industrial X-ray radiography [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2016 M11 24 - 28 pages This standard specifies the radiation shielding requirements for industrial X-ray radiography room. This standard applies to the industrial X-ray radiographic device room below 500 kV. |
Contents
3 | |
Detection room shielding thickness table under typical conditions | 13 |
Informative Example of Xray detection room shielding estimation | 21 |
amendment to GBZT 2502014 Radiation shielding specification | 27 |
Common terms and phrases
16 mm lead accordance with 3.1 aluminium B.2 of Appendix calculate the required calculated in accordance commonly used maximum control level determined control room current of X-ray density is 11.3 detection room roof detection room shielding determined in accordance dose rate reference dose reference control Figure C.1 final shielding thickness hour µSv/h Kcor kV X-ray layer thickness TVL lead and concrete Lead Concrete Note lead density leakage radiation dose leakage radiation shielding m²/(mAh maximum tube current maximum tube voltage micro-Sievert per hour milliamps NCRP personnel door primary radiation shielding radiation and scattered radiation dose rate radiation source point rate reference control reference control level required lead thickness Residence factor room is taken scattered radiation shielding shielding design shielding material thickness shielding transmission factor source point target Table B.2 tenth value layer typical conditions unit of mSv value layer thickness X-ray corresponding X-ray in lead X-ray radiography device X-ray tube µSv