Fuzzy optimization of radon reduction by ventilation system in uranium mine

• Published in: Nuclear engineering and technology Vol. 55; no. 6; pp. 2222 - 2229
• Main Authors: Zhang, Meirong, Dai, Jianyong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2023; Elsevier; 한국원자력학회
• Subjects: Fuzzy optimization; Radioactive pollutants; Radon exhalation dynamics; Radon reduction by ventilation; Swarm intelligence algorithms; 원자력공학; Swarm intelligence algorithms; Fuzzy optimization; Radioactive pollutants; Radon reduction by ventilation; Radon exhalation dynamics
• ISSN: 1738-5733; 2234-358X
• DOI: 10.1016/j.net.2023.02.020

Radon and radon progeny being natural radioactive pollutants, seriously affect the health of uranium miners. Radon reduction by ventilation is an essential means to improve the working environment. Firstly, the relational model is built between the radon exhalation rate of the loose body and the ventilation parameters in the stope with radon percolation-diffusion migration dynamics. Secondly, the model parameters of radon exhalation dynamics are uncertain and described by triangular membership functions. The objective functions of the left and right equations of the radon exhalation model are constructed according to different possibility levels, and their extreme value intervals are obtained by the immune particle swarm optimization algorithm (IPSO). The fuzzy target and fuzzy constraint models of radon exhalation are constructed, respectively. Lastly, the fuzzy aggregation function is reconstructed according to the importance of the fuzzy target and fuzzy constraint models. The optimal control decision with different possibility levels and importance can be obtained using the swarm intelligence algorithm. The case study indicates that the fuzzy aggregation function of radon exhalation has an upward trend with the increase of the cut set, and fuzzy optimization provides the optimal decision-making database of radon treatment and prevention under different decision-making criteria.