32 Ill. Adm. Code 340.620
Control of Access to Very High Radiation Areas
Section 340
Section 340.620 Control of
Access to Very High Radiation Areas
In addition to the controls
required by Section 340.610 of this Section, the licensee or registrant shall
institute measures to ensure that an individual is not able to gain
unauthorized or inadvertent access to areas in which radiation levels could be
encountered at 5 Gy (500 rad) or more in 1 hour at 1 meter from a source of
radiation or any surface through which the radiation penetrates.