DISTRIBUTION OF GAMMA RADIATION DOSE RATE AND ACTIVITY CONCENTRATION IN SOIL RELATED WITH NATURAL RADIONUCLIDES ON TAIWAN MAIN ISLAND. Issue 13 (9th September 2022)

• Record Type: Journal Article
• Authors: Saito, Kyoko; Inoue, Kazumasa; Ishita, Yuya; Shimizu, Hideo; Fukushi, Masahiro
• Is Part Of: Radiation protection dosimetry. Volume 198:Issue 13/15(2022)
• Page Start: 998
• Page End: 1003
• Publication Date: 2022-09-09
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncac031
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract: To enable precise assessment of health impacts following a nuclear power plant accident, extensive and detailed data on environmental radiation levels are needed. This study was undertaken to investigate the air and the soil radiation levels using a car-borne survey on the main island of Taiwan where no extensive environmental radiation distribution survey had been conducted before. The mean air absorbed dose rate on this island was 57 ± 10 nGy h −1 . The measured dose rate distribution varied depending on the geology of the soils, and ranged from 22 to 113 nGy h −1 . The mean radiation level in soil was 539 ± 124 Bq kg −1 for 40 K, 23 ± 8 Bq kg −1 for 238 U and 41 ± 22 Bq kg −1 for 232 Th. The air absorbed dose rate (58 nGy h −1 ) calculated from these data of mean radiation level in soil was comparable to that determined by the car-borne survey method. Thus, this study yielded detailed data on air absorbed dose rate depending primarily on the geology of the soils on the main island of Taiwan.