Radiological Protection Ordinance
(RPO)

¹ Con­trolled areas means areas which are sub­ject to spe­cif­ic re­quire­ments for the pur­pose of pro­tect­ing against ex­pos­ures to ion­ising ra­di­ation and pre­vent­ing the spread of con­tam­in­a­tion. In the area su­per­vised by EN­SI, the term con­trolled zone may con­tin­ue to be used for con­trolled areas.

2 The fol­low­ing are to be es­tab­lished as con­trolled areas:

a.

work­ing areas as spe­cified in Art­icle 81;

b.

zone types I–IV as spe­cified in An­nex 10;

c.

areas in which air­borne con­tam­in­a­tion may ex­ceed 0.05 CA as spe­cified in An­nex 3 Column 11 or sur­face con­tam­in­a­tion may ex­ceed 1 CS as spe­cified in An­nex 3 Column 12.

3 The su­per­vis­ory au­thor­ity may re­quest that fur­ther areas be es­tab­lished as con­trolled areas if this is ap­pro­pri­ate for or­gan­isa­tion­al reas­ons.

4 The li­cence hold­er must en­sure that ac­cess to con­trolled areas is only pos­sible for au­thor­ised per­sons.

5 Con­trolled areas must be clearly de­lim­ited and marked as spe­cified in An­nex 8.

6 The li­cence hold­er must su­per­vise com­pli­ance with guid­ance val­ues for am­bi­ent dose rates, con­tam­in­a­tion and in­door air activ­ity con­cen­tra­tions, and com­pli­ance with pro­tec­tion meas­ures and safety pro­vi­sions with­in con­trolled areas.