Section 5: Preventive measures and resources

The employer shall identify any zone where workers are likely to be exposed to levels of ionising radiation exceeding: 1° For the whole body, assessed on the basis of the effective dose: 0.08 millisieverts per month; 2° For the extremities or the skin, assessed on the basis of the equivalent dose: 4 millisieverts per month; 3° For the concentration of radon activity in the air, assessed on the basis of…

I.-These zones are designated: 1° For effective dose: a) “Blue supervised area”, when it is less than 1.25 millisieverts integrated over one month; b) “Green controlled area”, when it is less than 4 millisieverts integrated over one month; c) “Yellow controlled area”, when it is less than 2 millisieverts integrated over one hour; d) “Orange Controlled Zone”, when it is less than 100 millisieverts integrated over one hour; e) “Red…

I.-The employer shall use appropriate means to delimit the supervised, controlled or radon zones that he has identified and shall limit access to them. The employer shall delimit an extremity zone when the monitored and controlled zones do not allow extremity exposure to be controlled and compliance with the occupational exposure limit values provided for in articles R. 4451-6 and R. 4451-8 to be guaranteed. II.-The employer shall put in…

The employer shall ensure that the delimitation of zones is always appropriate, particularly in the light of the results of the checks on the effectiveness of the means of prevention provided for in section 6 of this chapter. Where necessary, he shall make the necessary adjustments to the delimitation of these zones, to their signs and to their access.