Radiological Protection Ordinance
(RPO)

1 The room or area in which in­stall­a­tions are op­er­ated or ra­dio­act­ive ma­ter­i­al is handled must be de­signed or shiel­ded in such a way that no lim­its are ex­ceeded.

2 At loc­a­tions out­side of con­trolled and su­per­vised areas where mem­bers of the pub­lic may be con­tinu­ously present, the weekly am­bi­ent dose must not ex­ceed 0.02 mSv. At loc­a­tions where people are not con­tinu­ously present, this value may be ex­ceeded by up to a factor of five.

3 If the loc­a­tions spe­cified in para­graph 2 are work­places, the am­bi­ent dose, giv­en an as­sumed work-re­lated pres­ence of 40 hours per week, may be high­er.

⁴ The in­flu­ence of sev­er­al dif­fer­ent ra­di­ation sources on a loc­a­tion to be pro­tec­ted must be taken in­to ac­count.

⁵ The FDHA, in con­sulta­tion with EN­SI, shall spe­cify guid­ance val­ues for the am­bi­ent dose with­in and out­side of con­trolled and su­per­vised areas.