A naturally ventilated accumulator for integrating measurements of radon flux from soil

作者：Zhuo Weihai^*; Furukawa Masahide; Tokonami Shinji

来源：Journal of Nuclear Science and Technology, 2007, 44(8): 1100-1105.

DOI：10.3327/jnst.44.1100

• radon flux
• integrating measurement
• soil
• ventilation rate
• meteorological conditions

For long-term and large-scale measurements of the averaged Rn-222 fluxes from soils in the general environmental conditions, a simple measuring method was developed. Rn-222 exhaling from soils is accumulated by a naturally ventilated accumulator (NVA) and its concentration is measured with passive Rn-222 monitors set inside the NVA. The ventilation rate of the NVA is about 0.26 h(-1) and it is hardly affected by the changes of meteorological conditions during field measurements. The air and soil conditions inside and outside of the NVA are nearly the same throughout the measurements. It indicates that the natural conditions of soils will not be significantly disturbed by the NVA. Field measurements confirmed that Soil Rn-222 fluxes measured by the new method were in general agreement with the results measured by another commonly used method and theoretical estimations. As no electric power is needed as well as the operation and maintenance are easy, the low-cost system offers a promise as an improved technique for long-term measurements of soil Rn-222 fluxes in the general environmental conditions.

• 出版日期2007-8
• 单位复旦大学