I completed a construction of Radiation Shielding Concrete (basement and semi-basement) for Oncology treatment ( LINAC, Cyclotron and Cyberknife). I'd like to set guidelines and/or recommendations for future use of the facility.
Construction materials:
Concrete - density is maintained 2.5 gm/cc, slump < 75
CA - 2/3 in and 1/2 in stone chips
Admixture- Masterpolyheed
Cement - PPC
Ice was introduced to reduce hydration temperature
I will suggest that you look the IAEA homepage for information about this subject.
I recommend you review the recommendations contained in the report by the National Council on Radiation Protection and Measurements: Report No. 151 - Structural Shielding Design and Evaluation for Megavoltage X- and Gamma-Ray Radiotherapy Facilities (2005). Their website is: http://ncrponline.org/.
You might try this pape:
T. H. Braid, R. F. Rapids, R. H. Siemssen, J. W. Trippie, and K. O'Brien, Calculations of shielding for large cyclotrons, IEEE Transactions on Nuclear Science, 18, 824, 1971.
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