| Medical linear accelerators (linacs) are frequently used to treat cancer patients. These linacs are located inside bunkers. The bunker's main purpose is to contain the radiation produced by the linac, such that the people outside the bunker do not suffer from radiation-induced illnesses. The current design method for bunkers relies on simplified equations. These equations do not always result in bunkers being built that match the designed protection criteria. This work aims to look at the use of Monte Carlo for bunker shielding calculations, as Monte Carlo more closely models radiation physics. It is hoped that this better modelling will lead to more accurate bunker designs. In this work, an 18 MV Siemens PRIMUS linac was modelled in MCNP, and promising comparisons to theory, measurements, and calculations were made. |
