Radiological Training for Accelerator Facilities
RADIOACTIVE WASTE ISSUES
Sources of Radioactive Waste
The radioactive waste from an accelerator facility tends to be mostly machine components or
experimental equipment used in or near the particle beam. These components are often of
copper, iron (steel), and aluminum. Other items or tasks contributing to radioactive waste are:
N Shielding blocks (iron, lead, or concrete).
N Cleaning materials.
Shielding blocks (iron, lead, or concrete)
Shielding blocks are quite large and their highest activity is usually below the surface.
Shielding blocks showing several rad/hr at the surface may have no removable
(wipeable) surface contamination and can be stored without contamination problems.
Whenever possible, shielding blocks should be stored for reuse where dose is not a
If possible, cooling water should be cleaned and recirculated/ reused. The use of "pure"
water minimizes the radioactivation problems caused by impurities.
It may be desirable to dispose of water before the tritium concentration becomes too
high. Cooling system capacities range from less than 10 gallons to tens of thousands of
gallons. Some possibilities for disposal are: