Radiological Protection Ordinance
(RPO)

1 Li­cence hold­ers may clear the hand­ling of ma­ter­i­al from man­dat­ory li­cens­ing and su­per­vi­sion if they demon­strate by a meas­ure­ment (clear­ance meas­ure­ment) that:

a.

the max­im­um am­bi­ent dose rate at a dis­tance of 10 cm from the sur­face, al­low­ing for nat­ur­al ra­di­ation, is less than 0.1 µSv per hour; and

b.

one of the fol­low­ing re­quire­ments is met:

1.

the spe­cif­ic activ­ity is be­low the clear­ance lim­it,

2.

the ab­so­lute activ­ity is less than the activ­ity of 1 kg of a ma­ter­i­al whose spe­cif­ic activ­ity is equal to the clear­ance lim­it.

2 If per­sons may be con­tam­in­ated when hand­ling ma­ter­i­al cleared in ac­cord­ance with para­graph 1, it must ad­di­tion­ally be en­sured by a meas­ure­ment that the sur­face con­tam­in­a­tion guid­ance value spe­cified in An­nex 3 Column 12 is com­plied with.

3 For the av­er­aging of the val­ues meas­ured in ac­cord­ance with para­graphs 1 and 2 to en­sure non-ex­ceedance of the clear­ance lim­it or the sur­face con­tam­in­a­tion guid­ance val­ues spe­cified in An­nex 3 Column 12, the fol­low­ing quant­it­ies must be com­plied with:

for the meas­ure­ment of activ­ity: 100 kg;

for the meas­ure­ment of sur­face con­tam­in­a­tion: 100 cm2.

4 In jus­ti­fied cases, the su­per­vis­ory au­thor­ity may ap­prove val­ues high­er than those spe­cified in para­graph 3.

5 Hand­ling of sol­id or li­quid ma­ter­i­al may be cleared without meas­ure­ment of activ­ity by tech­nic­al means if:

a.

the max­im­um am­bi­ent dose rate at a dis­tance of 10 cm from the sur­face, al­low­ing for nat­ur­al ra­di­ation, is less than 0.1 µSv per hour;

b.

para­graph 2 is com­plied with; and

c.

one of the fol­low­ing re­quire­ments is met:

1.

it can be demon­strated that the clear­ance lim­it is not ex­ceeded by an as­sess­ment of the ma­ter­i­als used or by ex­clud­ing ac­tiv­a­tion,

2.

the su­per­vis­ory au­thor­ity has ap­proved the mod­els and cal­cu­la­tions used to demon­strate that the clear­ance lim­it is not ex­ceeded.

6 The su­per­vis­ory au­thor­ity may define the con­di­tions un­der which the res­ults of a clear­ance meas­ure­ment must be re­por­ted to it pri­or to the clear­ance of the ma­ter­i­als.