According to typical liquefied chlorine pipeline leakage,which is common in chemical production,the diffusion processes in different stages were simulated by using the Box model and Gauss puff model respectively.At th...According to typical liquefied chlorine pipeline leakage,which is common in chemical production,the diffusion processes in different stages were simulated by using the Box model and Gauss puff model respectively.At the same time,the hazard area and degrees of influence were determined by using the intoxication accident consequences simulation techniques.The results showed that if 20 kg of liquefied chlorine leaked instantaneously,the heavy gas formed would change to neutral gas at 50 m to the leeward side.The hazard area could be divided into death zone,severe injury zone,slight injury zone,and breathe-in reaction zone.The death zone extended as far as 85 m to the leeward side,in which the death rate could reach up to 95%,and the duration of exposure should not exceed 10 min.The severe injury zone extended as far as 200 m to the leeward side,in which the death rate was 4%,and the duration of exposure should not exceed 60 min.The results of the simulation were in agreement with the consequences of such an accident caused practically.Therefore,it is reliable to simulate the accident results of unexpected leakage by choosing a suitable diffusion model and correlation parameters,and it is very important for supervising disaster reduction and salvage.展开更多
文摘利用高斯烟团模型,对爆炸当量为2 000 kgTNT的核事故开展计算研究,从污染区域内选择3个取样点,三维的坐标分别为(11.319 4,40.176 7,H1),(116.319 4,40.155 9,H2),(116.328 6,40.153 3,H3)。模拟扩散10 min后总外照射剂量率H1处剂量率较小,只有2个高度点出现剂量率,分别为235 m 1.7919E-001mSv/h和315 m 1.6596E-001mSv/h;H2高剂量段取3点记录,分别为275 m 1.6959E+000mSv/h、345 m1.6284E+000mSv/h和415 m 1.2449E+000mSv/h;H3高剂量段任取3点记录,分别为345 m 5.7242E-001mSv/h、415 m 7.2301E-001mSv/h和475 m 3.7625E-00mSv/h。高剂量区间主要分布在300 m到400 m之间。
文摘According to typical liquefied chlorine pipeline leakage,which is common in chemical production,the diffusion processes in different stages were simulated by using the Box model and Gauss puff model respectively.At the same time,the hazard area and degrees of influence were determined by using the intoxication accident consequences simulation techniques.The results showed that if 20 kg of liquefied chlorine leaked instantaneously,the heavy gas formed would change to neutral gas at 50 m to the leeward side.The hazard area could be divided into death zone,severe injury zone,slight injury zone,and breathe-in reaction zone.The death zone extended as far as 85 m to the leeward side,in which the death rate could reach up to 95%,and the duration of exposure should not exceed 10 min.The severe injury zone extended as far as 200 m to the leeward side,in which the death rate was 4%,and the duration of exposure should not exceed 60 min.The results of the simulation were in agreement with the consequences of such an accident caused practically.Therefore,it is reliable to simulate the accident results of unexpected leakage by choosing a suitable diffusion model and correlation parameters,and it is very important for supervising disaster reduction and salvage.
