1960-1961 / 3107
Schematic of a linac bunker (maze - door shielding)
•
Beam attenuation from patient not
considered
•
Max possible leakage radiation
•
Overestimate workload and occupancy
•
Staff always in the most exposed place
of the occupied area
•
NCRP 151
→
-
E ≤ 10 MV (
g
scatter + leakage)
- E > 10 MV (
g,
n)
•
Calculations depend on scatter from
walls - in general try to maximize the
number of scatter events
•
Neutron door
→
borated paraffin to
slow down and capture neutrons and
avoid the production of penetrating
g