ABSTRACT
These are provided at the head of a wastewater treatment plant to
remove large floating objects such as wood and rags.
Unit of ionizing radiation corresponding to energy absorption of 100 ergs
(1 105 J/s) per gram. The rad is a massive radiation dose to a person and another unit for exposure of humans to radiation has been developed.
This is the rem (roentgen-equivalent-man) and corresponds to the
amount of radiation that produces an energy dissipation in the human
body that is equivalent biologically to one roentgen of X-rays. The rad
has been replaced by the Gray (Gy), which is equal to 100 rads.