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The influence of particle size distribution on dose conversion factors for radon progeny in the underground excavations of hard coal mine.

Abstract：

:In Polish underground mines, hazards caused by enhanced natural radioactivity occur. The sources of radiation exposure are short-lived radon decay products, mine waters containing radium 226Ra and 228Ra and the radioactive sediments that can precipitate out of these waters. For miners, the greatest exposure is usually due to short-lived radon decay products. The risk assessment is based on the measurement of the total potential alpha energy concentration (PAEC) and the evaluation of the related dose by using the dose conversion factor as recommended by relevant legal requirements. This paper presents the results of measurements of particle size distributions of ambient aerosols in an underground hard coal mine, the assessment of the radioactive particle size distribution of the short-lived radon decay products and the corresponding values of dose conversion factors. The measurements of the ambient airborne particle size distribution were performed in the range from a few nanometers to about 20 μm. The study therefore included practically the whole class of respirable particles. The results showed that the high concentration of ultrafine and fine aerosols measured can significantly affect the value of the dose conversion factors, and consequently the corresponding committed effective dose, to which the miners can be exposed.

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Skubacz K,Wojtecki Ł,Urban P

doi

10.1016/j.jenvrad.2016.05.020

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

68-79

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(16)30164-3

journal_volume

162-163

pub_type

杂志文章

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