Objective: To investigate the reasonable airflow organization and exhaust system facilities during the operation of the inspection workshop, and solve the problem of the accumulation of harmful gases such as ozone and nitrogen oxides in the workshop. Methods: In May 2023, computational fluid dynamics (CFD) technology was used to numerically simulate the diffusion of ozone and nitrogen oxides generated by industrial radiographic inspection operations, and the comparative detection method was used to analyze the ozone and nitrogen oxides concentrations before and after the renovation of the ventilation system of the inspection workshop. Results: After the renovation of ventilation system, the average concentration of ozone in the inspection workshop decreased from 0.81 mg/m(3) to 0.03 mg/m(3), and the average concentration of nitrogen oxides decreased from 0.42 mg/m(3) to 0.01 mg/m(3), and the differences were statistically significant (t=20.51, 10.38, P<0.001) . Conclusion: The ventilation facilities of the inspection workshop are set up in the airflow organization mode of sending up and down the exhaust, and the ventilation pipes are scientifically designed through the calculation of ventilation hydraulic balance, which can effectively control the concentration of harmful gases in the inspection workshop.
目的： 探讨探伤厂房运行过程中合理的气流组织及排风系统设施，解决厂房内伴生的臭氧和氮氧化物等有害气体蓄积的问题。 方法： 于2023年5月，采用计算流体动力学（CFD）技术，对工业射线探伤作业产生的臭氧和氮氧化物扩散规律进行数值模拟，并采用对比检测方法对探伤厂房通风系统改造前后臭氧和氮氧化物浓度进行分析。 结果： 通风系统改造后，探伤厂房内臭氧的平均浓度由0.81 mg/m(3)降为0.03 mg/m(3)，氮氧化物的平均浓度由0.42 mg/m(3)降为0.01 mg/m(3)，差异均有统计学意义（t=20.51、10.38，P<0.001）。 结论： 探伤厂房通风设施设置采用上送下排的气流组织方式，并经通风水力平衡计算设计科学的通风管道，可对探伤厂房的有害气体浓度进行有效控制。.
Keywords: Computational fluid dynamics, CFD; Inspection workshop; Nitrogen oxide; Ozone; Radiation, ionizing; Technical reconstruction; Ventilation.