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Zawartość zarchiwizowana w dniu 2022-12-05

Quantative measurement of aerosol deposition on skin, hair and clothing for dosimetric assessment

Cel



The objective of this project is to undertake a study of the deposition of airborne particles to skin, hair and clothing, to investigate the retention and clearance of the deposited matter and to develop dosimetric models. Each of these aspects currently involves significant physics uncertainties. Deposits of particles, containing beta-emitters, will normally cause a dose to the skin. This contribution has so far largely been ignored in estimates of the total dose to exposed individuals. Its importance has been highlighted in a recent NRPB paper (Jones (1990), EUR 13013). The paper contains a plea for experimental investigations into the processes of deposition to the skin. The proposed study aims to fill this gap in knowledge in deposition and retention parameters for skin, hair and clothing. The data and models resulting will be used in consequence assessment codes, e.g. COSYMA, and will have a wider application in human dosimetry.
In conducting the experiments, appropriate monodisperse surrogate aerosols will be generated. Test aerosol (from submicron to supra micron) will be produced using a method already developed by the partners, Imperial College and Riso, in which the particles are tracer-labelled and analysed subsequently with neutron activation analysis. This highly sensitive method allows surface sampling together with low airborne concentrations.
Deliverables will be related specifically to issues of deposition, sampling/retention, clearance and dosimetry. In the main, experiments will be performed in aerosol test chambers, but also in realistic environments (e.g. in an electrostatic field in front of the computer). Deposition studies will take account of surface characteristics, air flow/turbulence and electrostatics, in addition to particle size. In-vitro studies of skin retention will be conducted. For long-term skin clearance, where surface sampling is necessarily limited, a non-invasive technique using fluorescence labelling will be employed. Also, deposition via rain will be examined in the later phases of the project.
The study will be performed with close connection between the partners and several experiments will be made as a joint effort.

Zaproszenie do składania wniosków

Data not available

System finansowania

CSC - Cost-sharing contracts

Koordynator

Risø National Laboratory
Wkład UE
Brak danych
Adres

4000 Roskilde
Dania

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Koszt całkowity
Brak danych

Uczestnicy (1)