caa a22 4500 397501676 CHVBK 20180308164534.0 cr unu---uuuuu 161202e19950501xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082663 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082663 Retrospective Assessment of Radioactivity Inhaled by Mineral Sands Workers [Elektronische Daten] [G.S. Hewson, K.W. Terry] Many long-term workers in the Western Australia mineral sands industry have chronically inhaled significant levels of thorium ore dust. As industry air sampling records are only reliable since 1986, a retrospective assessment to the 1960s has been made of activity inhaled by these workers. Gravimetric dust sampling data since the mid-1970s are reviewed and inhaled activity derived assuming an estimated dust specific activity. Pre-1977 intakes are derived by considering site specific monazite production levels, or monazite content of heavy mineral feed, and by reviewing the inspectorate's historical ventilation summaries. Broad assignments of inhaled activity are made for dry plant operators and other workers at each site. The retrospective assessment results in some operators being assigned average annual intakes up to 10,000 Bq, which implies annual committed effective doses well in excess of 50 mSv. These rude estimates are broadly consistent with intakes derived from thorium lung burden measurements. Radiation Protection Dosimetry Hewson G.S. aut Terry K.W. aut Radiation Protection Dosimetry Oxford University Press 59/4(1995-05-01), 291-298 0144-8420 59:4<291 1995 59 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082663 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082663 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hewson G.S. aut NATIONALLICENCE 700 1- Terry K.W. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 59/4(1995-05-01), 291-298 0144-8420 59:4<291 1995 59 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford