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Zhao G.-C.,Beijing Radiation Safety Technology Center | Wang Y.,Beijing Radiation Safety Technology Center
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2015

Measurements of the cumulative dose and instantaneous dose rate of indoor and outdoor environment respectively are done and the results are compared. The results indicate that the value of En for the cumulative dose and instantaneous dose rate of indoor is less than or equal to 1, so that the result is satisfactory; The relative deviation of cumulative dose rate and the instantaneous dose rate for Beijing environment in 2013 is less than 30%, so the comparison result is satisfactory too. This comparison, to some extent, verify the reliability of the measurement results based on two different principle for radiactive dose monitoring instruments, one for cumulative dose measurement system, the other for the instantaneous dose measurement instrument. ©, 2015, Atomic Energy Press. All right reserved. Source


Lu W.-W.,Finnish Center for Radiation and Nuclear Safety | Song F.-X.,Beijing Radiation Safety Technology Center | Zeng L.-P.,Beijing Radiation Safety Technology Center | Lv H.-N.,Beijing Radiation Safety Technology Center
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2012

In order to establish a quick and easy method to measure thorium-232 radioactivity concentration in the environmental soil, the powdered tablet sample preparation was used. The thorium quality content in environmental soil measured by energy dispersive fluorescence spectrometer, and converted into thorium-232 radioactive concentration, was compared with calculated radioactive concentration of thorium-232 measured by the high purity germanium gamma spectrometer. The relative deviation is between 6.12% and 29.46%. Paired t-test shows that the two sets of data are consistent. The precision and accuracy of the method are good. It demonstrates that the quick and easy method of fluorescence spectrometer can be used to analyze thorium-232 radioactive concentration in the soil. Source


Wang H.-P.,Beijing Radiation Safety Technology Center | Wang H.-P.,China Institute of Atomic Energy | Song F.-X.,Beijing Radiation Safety Technology Center | Li X.-Z.,Beijing Radiation Safety Technology Center | And 2 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

The paper analyze the environmental surface gamma radiation dose rate rise in the process of rainfall, reference the research results about the influence of precipitation on the washout of aerosol particle in atmospheric sciences field, establish a model of the dose rate rising process, build the theoretical calculation equation. The results show that calculation curves can be better conform to actual measurement curve. By the theoretical derivation equation in this paper and the measured rainfall intensity data, the calculation to judge whether there is artificially radiation anomalies is provided. Source


Li X.-Z.,Beijing Radiation Safety Technology Center | Wang H.-P.,Beijing Radiation Safety Technology Center | Gu H.-K.,Beijing Radiation Safety Technology Center | Song F.-X.,Beijing Radiation Safety Technology Center | And 2 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2013

The article presents a retrospect aiming at Beijing radiation emergency monitoring work (from 12 March to 22 May) after the Fukushima nuclear accident, analyses the character about this nuclear accident radionuclide discharge, introduces the monitoring objects and methods such as γ dose rate's continuous automatic monitoring, aerosol monitoring and soil monitoring and so on. The monitoring data is analyzed and the influence of the leakage is evaluated. The monitoring results indicate that the range of γ continuous dose rate is in the range of Beijing background radiation level, the radionuclides are 131I, 137Cs and 134Cs. Based on the aerosol data, considering the external exposure from airborne radionuclide and internal exposure from inhalation, assuming the three radionuclides exist at the same time, the effective dose to infants, youths and adults are all lower than one of a million of effective natural background dose. Source

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