Radiological Protection Ordinance
(RPO)

¹ For pur­poses of mon­it­or­ing, li­cence hold­ers shall clas­si­fy the oc­cu­pa­tion­ally ex­posed per­sons in­to cat­egor­ies A and B in ac­cord­ance with para­graphs 2–4.

2 Cat­egory A com­prises per­sons who:

a.

may ac­cu­mu­late the fol­low­ing doses per cal­en­dar year in the course of their work:

1.

an ef­fect­ive dose great­er than 6 mSv,

2.

an equi­val­ent dose for the lens of the eye great­er than 15 mSv, or

3.

an equi­val­ent dose for the skin, hands or feet great­er than 150 mSv;

b.

as a res­ult of radon ex­pos­ure at the work­place re­ceive an ef­fect­ive dose great­er than 10 mSv per cal­en­dar year; or

c.

work as in­tern­al per­son­nel at a nuc­le­ar in­stall­a­tion.

3 Cat­egory B com­prises all oc­cu­pa­tion­ally ex­posed per­sons not be­long­ing to cat­egory A.

⁴ Per­sons en­gaged in activ­it­ies where the risk of ac­cu­mu­lat­ing doses as spe­cified in para­graph 2 let­ter a is neg­li­gible shall be as­signed to cat­egory B for the per­form­ance of these activ­it­ies. This in­cludes in par­tic­u­lar activ­it­ies:

a.

in­volving the op­er­a­tion of dia­gnost­ic X-ray sys­tems in med­ic­al, dent­al and veter­in­ary prac­tices, ex­cept in the high-dose range;

b.

as oc­cu­pa­tion­ally ex­posed air­crew.

⁵ If ap­plic­ants or li­cence hold­ers demon­strate that an activ­ity does not ful­fil any of the con­di­tions spe­cified in para­graph 2, they may re­quest the su­per­vis­ory au­thor­ity to as­sign the per­sons per­form­ing this activ­ity to cat­egory B.