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FP5

TENORMHARM Résumé de rapport

Project ID: FIGM-CT-2001-00174
Financé au titre de: FP5-EAECTP C
Pays: Germany

Comparison of exposure scenarios used by contractors to scenarios described in radiation protection 107

The report RP 107 established reference levels for regulatory control of workplaces where materials are processed, which contain enhanced levels of natural occurring radionuclides. The reference levels in RP 107 which are corresponding to specified dose levels were derived from “normal assumptions” and “unlikely assumptions” defined for two different exposure scenarios of each exposure pathway.

In contrast, the dose calculations carried out by the contractors of the TENORMHARM project are based upon measurements of irradiation and radionuclide concentration at a working place or an other location of interest. The dose calculation was carried out according to the German methodology described in the “Guideline for calculation of dose resulting from mining related legacies”.

It was demonstrated that the applicability of reference levels for regulatory control of workplaces given in RP 107 seems to be limited because the considered scenarios used for deriving “reference levels” do not reflect sufficiently the recent work conditions. Moreover, any scenarios described by the contractors have no applicable counterparts in RP 107.

According to the modern work conditions and the statutory requirements of measures to prevent an ingestion of contaminated dust this exposure pathway can be neglected in most cases. The same concerns the contamination of skin.

Contact

Dietmar WEISS, (group leader)
Tél.: +49-30-88589146
Fax: +49-30-88589111
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