铀矿通风网络中氡及氡子体浓度的解算与调控

Abstract

Abstract: The radiation dose received by workers in uranium mines mainly comes from radon and radon progeny. In order to reduce the radiation dose caused by radon in uranium mine, it is necessary to provide sufficient and reliable radon reduction air volume to the underground on the basis of ensuring the air quality. Therefore, according to the ventilation network calculation theory, radionuclide decay theory and turbulent mass transfer theory, the calculation model of radon and radon progeny concentration in ventilation network is established. Using MATLAB software, according to the proposed model, the radon and radon progeny concentration distribution in the specific branch of a hard rock uranium mine is calculated and analyzed. The results show that: 1) the solution model can analyze the radon and radon progeny concentration of single branch, multi branch and ventilation network with local radon source; 2) According to the protection requirements against radon and radon progeny, the branch with the concentration of radon and radon progeny exceeding the limit can be judged, and the optimal air volume of radon and radon progeny reduction as well as the wind pressure of fan operation can be calculated by air volume adjustment method when the corrected air volume is small.

Key words: radon, radon progeny, concentration distribution, ventilation network, local radon source, regulation

CLC Number:

TL72

YE Yongjun, ZHANG Yingpeng, CHEN Daijia, ZHANG Xiaoyu. Calculation and regulation of radon and radon progeny concentration in uranium mine ventilation network[J].RADIATION PROTECTION, 2023, 43(3): 257-264.

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Calculation and regulation of radon and radon progeny concentration in uranium mine ventilation network

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