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http://dx.doi.org/10.7742/jksr.2020.14.5.545

Calculation Formula for Shielding Thickness of Direct Shielded Door installed in Treatment Room using a 6 MV X-ray Beam  

Park, Cheol Seo (Corporate Subsidiary Research Institute, Korea Best Engineering Co. Ltd)
Kim, Jong Eon (Department of Radiological Science, Kaya University)
Kang, Eun Bo (Department of Radiological Science, Dong-Eui Institute of Technology)
Publication Information
Journal of the Korean Society of Radiology / v.14, no.5, 2020 , pp. 545-552 More about this Journal
Abstract
The purpose of this study is to derive a lead thickness calculation formula for direct-shielded doors based on NCRP Report No.151 and IAEA Safety Report Series N0.47. After deriving the dose rate calculation formula for the direct shielded door, this formula was substituted for the lead shielding thickness calculation formula to derive the shielding thickness calculation formula at the door. The lead shielding thickness calculated from the derived direct shielded door shielding thickness calculation formula was about 6% lower than that calculated by the NCRP and IAEA secondary barrier shielding thickness calculation methods. This result is interpreted as meaning that the thickness calculation is more conservative from the NCRP and IAEA secondary barrier shielding thickness calculation methods and fits well for secondary beam shielding. In conclusion, it is thought that the formula for calculating lead shielding thickness of the direct shielded door derived in this study can be usefully used in the shield design of the door.
Keywords
Shielding; Door; Secondary beam; Head leakage; Patient scattering;
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