Radiological Protection Ordinance
(RPO)

¹ Air­borne or li­quid ra­dio­act­ive sub­stances may be dis­charged in ex­haust air to the at­mo­sphere or in wastewa­ter to sur­face wa­ters.

² The li­cens­ing au­thor­ity shall spe­cify max­im­um per­miss­ible dis­charge rates and, where ap­pro­pri­ate, dis­charge activ­ity con­cen­tra­tions for each dis­charge site on a case-by-case basis.

³ It shall spe­cify the dis­charge rates and dis­charge activ­ity con­cen­tra­tions in such a way that the source-re­lated dose con­straint in ac­cord­ance with Art­icle 13 para­graph 3 and the im­mis­sion lim­its in ac­cord­ance with Art­icle 24 are not ex­ceeded.

⁴ It may in­crease by up to a factor of three the dis­charge activ­ity con­cen­tra­tions in ac­cord­ance with para­graphs 2 and 3 for dis­charges in­to sew­ers if it can be as­sured that ap­pro­pri­ate di­lu­tion is guar­an­teed at all times pri­or to dis­charge in­to pub­licly ac­cess­ible wa­ters.