Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (4): 040604 doi: 10.13538/j.1001-8042/nst.26.040604

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Atmospheric radionuclides from Fukushima Dai-ichi nuclear accident detected in Lanzhou, China

WU Jia-Long, WANG Yun, SUN Wei, LUO Wei-Li,WANG Yan-Jun, ZHANG Biao   

  1. Gansu Center for Disease Prevention and Control, Lanzhou 730000, China
  • Contact: WU Jia-Long E-mail:T8268774@163.com
  • Supported by:

    Supported by the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (No. CTBTO/IMS/CNP21)

WU Jia-Long, WANG Yun, SUN Wei, LUO Wei-Li, WANG Yan-Jun, ZHANG Biao. Atmospheric radionuclides from Fukushima Dai-ichi nuclear accident detected in Lanzhou, China.Nuclear Science and Techniques, 2015, 26(4): 040604     doi: 10.13538/j.1001-8042/nst.26.040604

Abstract:

After the Fukushima Dai-ichi nuclear power plant accident on March 11, 2011, the radioactivity released from the accident was transported around the globe by atmospheric processes. The radioactivity monitoring program on atmospheric particulate in Lanzhou, China was activated by GSCDC to detect the input radionuclides through atmospheric transport. Several artificial radionuclides were detected and measured in aerosol samples from March 26 to May 2, 2011. The peaked activity concentrations (in mBq/m3) were: 1.194 (131I), 0.231 (137Cs), 0.173 (134Cs) and 0.008 (136Cs), detected on April 6, 2011. The average activity ratio of 131I/137Cs and 134Cs/137Cs in air were 13.5 and 0.78. The significant increase of 137Cs activity concentration, one order of magnitude higher than pre-Fukushima accident levels, in ground level aerosol was observed in 2013, as its resuspension from soil. The back-trajectory analysis simulated by NOAA-ARL HYSPLIT shows a direct transfer of the air masses released from Fukushima to Lanzhou across the Pacific Ocean, North America and Europe at the height close to 9000m AGL. The value of effective dose for inhalation is close to one millionth of the annual limit for the general public.

Key words: Fukushima, Nuclear accident, Radioactivity, Lanzhou, China