caa a22 4500 397503830 CHVBK 20180308164539.0 cr unu---uuuuu 161202e19950301xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082633 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082633 Indoor and Outdoor Gamma Radiation in Finland [Elektronische Daten] [H. Arvela, H. Hyvönen, H. Lemmelä, O. Castrén] This study measured the dose rate in air in the dwellings of 350 persons, selected randomly from the central population register of Finland. TLD dosemeters were employed for half-year measurements in 1991. Additionally, the results were compared with outdoor gamma radiation calculations based on data from a previous survey conducted in 1978-1980. The absorbed dose rate in air in low-rise residential buildings and in blocks of flats had ranges of 24-144 nGy.h-1 and 45-184 nGy.h-1, respectively, the population weighted mean values being 58 and 100 nGy.h-1. The weighted mean for the total population was 73 nGy.h-1. In the figures given, the dose rate due to cosmic radiation, 32 nGy.h-1, was subtracted. The population weighted mean terrestrial dose rate outdoors was 71 nGy.h-1. In houses and in flats the mean indoor/outdoor dose rate ratios were 0.84 and 1.33 respectively. This gave a population weighted mean for this ratio of 1.00. A statistically significant increase caused by the Chernobyl fallout was observed, these results being in agreement with shielding factor studies. This increment due to the Chernobyl fallout, which was subtracted, was 0.3-19 nGy.h-1. The national annual average effective dose due to natural terrestrial radiation was 0.45 mSv and owing, in 1991, to the Chernobyl fallout 0.03 mSv. Radiation Protection Dosimetry Arvela H. aut Hyvönen H. aut Lemmelä H. aut Castrén O. aut Radiation Protection Dosimetry Oxford University Press 59/1(1995-03-01), 25-32 0144-8420 59:1<25 1995 59 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082633 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082633 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arvela H. aut NATIONALLICENCE 700 1- Hyvönen H. aut NATIONALLICENCE 700 1- Lemmelä H. aut NATIONALLICENCE 700 1- Castrén O. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 59/1(1995-03-01), 25-32 0144-8420 59:1<25 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