Impact on Absorbed Dose Rate in Air from Asphalt Pavement Associated with Transport Infrastructure Developments on Phu Quoc Island, Vietnam

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  • Van Le Tan
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
  • Inoue* Kazumasa
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
  • Fujisawa Makoto
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
  • Arai Moeko
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
  • Fukushi Masahiro
    Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan

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<p>The absorbed dose rate in air was measured using the car-borne survey technique on Phu Quoc Island, Vietnam in December 2015. The average absorbed dose rate in air measured on asphalt pavement was 61±15 nGy h-1 and higher dose rates in air were observed along asphalt roads, whereas the average value measured on unpaved roads was 29±6 nGy h-1, meaning the former average dose rate was 2.0 times higher. The average dose rate for the entire island was 44±20 nGy h-1. The estimated annual external effective dose was 0.29 mSv y-1, which is 60% of the worldwide average.</p>

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