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Radiological Protection Ordinance
(RPO)

English is not an official language of the Swiss Confederation. This translation is provided for information purposes only and has no legal force.

of 26 April 2017 (Status as of 1 January 2021)

Art. 106 Clearance measurement and other clearance methods

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.