Standaardisatie van persoonsdosimetrie bijberoepsmatige blootstelling aan ioniserende straling

摘要

The Ministry of Social Affairs and Employment requested RIVM toinvestigate the standardisation of individual monitoring for occupationalexposures to ionising radiation. Law lays down the assessment of theeffective or equivalent dose of exposed workers. According to theobjective of this study a summary is provided of possibilities to relatethe monitoring results to the effective dose and its registration in theNational Dose Registration and Information System (NDRIS). Thus thepossibility is created for the data registered in NDRIS to be an accuratefeasible representation of the actually received (effective) dose. Byusing the available literature and consulting experts in the field ofradiation protection and work protocols, four policy options for applyingcorrection factors are proposed. Such a correction would only beappropriate for the medical practice and only if the dosimeter is wornoutside the lead apron. We recommend, in accordance with all otherEuropean countries, not to use a correction on the monitored dose. Furthermore, we recommend the following. Only if the monthly or fourweekly dose exceeds a derived limit of one tenth of the annual doselimit, one is allowed to reassess the effective dose. This is done in 7countries of the European Union. An appropriate local radiation expert(minimum level 3) may carry out this reassessment. The radiation expertmust work under the responsibility of a radiation expert with a level 2qualification. When the corrected value significantly differs from themonitored dose the employer may request the Labour Inspectorate to adjustthe dose in the dose registration system. When the Inspectorate honoursthe request, the corrected dose should be entered intoNDRIS.