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991.
Chains of accidents (the domino effect) have been occurring with ever increasing frequency in chemical process industries. This is reflected in several accidents ‘J Loss Prevent Process Ind 12 (1999a) 361’; the world's worst industrial accident of the 1990s — the Vishakhpatnam disaster — also involved the domino effect ‘J Loss Prevent Process Ind 12 (1999a) 361; and Process Safety Prog 18 (1999b) 135’. Such chains of accidents have a greater propensity to cause damage than stand-alone accidents ‘Process Safety Prog 17(2) (1998a) 107; and J Loss Prevent Process Ind 12 (1999a) 361’.In order to assess the likelihood of occurrence of the domino effect and its damage potential, use of deterministic models in conjunction with probabilistic analysis is required. Recently we have proposed a systematic methodology called ‘domino effect analysis’ (DEA). A computer-automated tool, DOMIFFECT, has also been developed by us based on DEA ‘Process Safety Prog 17(2) (1998a) 107; Environment Model Software 13 (1998b) 163; and Risk assessment in chemical process industries: advanced techniques. Discovery Publishing House (1998c)’.This paper illustrates the application of DEA and DOMIFFECT to an industrial complex comprising 16 different industries. Out of 12 credible accident scenarios envisaged in three different industries — namely Madras Refineries Limited (MRL), UB Petrochemicals (UBP) and Indian Organic Chemicals Limited (IOCL), eight scenarios are likely to cause the domino effect. A further detailed analysis reveals that accidents in the storage of liquified petroleum gas and propylene and in the reflux drum units of MRL may cause domino effects. Similarly, propylene storage of UBP and monoethylene glycol storage of IOCL are also likely to cause domino effects. The impact of various chains of accidents has been forecast which reveals that in several cases the accidents may be catastrophic, harming the entire industrial complex of 16 industries. The study leads to the identification of ‘hot spots’ — units that pose the greatest risk — in turn forewarning the industries concerned and enabling them to prioritize and augment accident-prevention steps. 相似文献
992.
分析中国西部地区生态环境的主要问题及其生态环境建设在中国的战略地位,指出西部地区应建立环境与经济相互协调,互相促进的生态经济体系。并从技术结构层面和政策层面对西部地区生态经济系统的建立提出一些新的想法与建议。 相似文献
993.
994.
IntroductionTheprintinganddyeingindustryhasahighpotentialenvironmentalimpact,principallyduetothereleaseoflargevolumesofwastewaterthatcontainhighorganicchargeandstrongcoloration .Therearemanyprocessestotreatwastewaterfromprintinganddyeingindustry ,butth… 相似文献
995.
996.
997.
粉煤灰的粉体特性及其对减水效应的影响 总被引:4,自引:0,他引:4
通过对粉煤灰颗粒形貌、平均粒径、粒度分布等粉体特性参量的测定和计算分析 ,发现粉煤灰的减水效应主要来自圆球形玻璃微珠的滚珠轴承润滑作用或对水泥絮凝结构的分散作用。过细的粉煤灰大掺量取代水泥后有可能会降低其减水效应 相似文献
998.
乡镇铝厂大气氟污染对区域冬小麦生长影响的研究 总被引:2,自引:0,他引:2
通过对郑州市某乡镇电解铝厂附近的参气,土壤及冬小麦等生态因素含氟量的分析与研究,表明:(1)铝厂所排放的化物是造成冬小麦减产的主要原因:(2)冬小麦各部位器官含量与距污染源的距离呈负相关;(3)对电解铝生产过程排放的气态氟化物应采取相应的治理和防护措施。 相似文献
999.
Bruno Brambati Giuseppe Simoni Maurizio Travi Cesare Danesino Lucla Tului Orsola Privitera Sabine Stioui Silvana Tedeschi Silvia Russo Paola Primignani 《黑龙江环境通报》1992,12(10):789-799
Transabdominal chorionic villus sampling (TA-CVS) was attempted in 328 high-risk pregnancies at 6–7 weeks of gestation. Sampling was feasible in 97.7 per cent of cases; chorionic tissue specimens of more than 10 mg were obtained in 94.4 per cent ofcases at the first needle insertion and in 100 per cent after a second attempt. Fetal karyotyping succeeded in 99.4 per cent of cases, while no diagnostic failures were reported in enzymatic and DNA analyses. Fetal loss rate in the first 4 weeks after CVS was significantly higher than in the later CVS series (7.2 vs. 2.5 per cent), but 50 per cent of losses were observed within 2 weeks in cases of inviable aneuploidies. A high incidence of severe limb abnormalities (1.6 per cent) was detected in pregnancies intended to continue, confirming the aetiological role of early CVS. Unclear visualization of the placental limits and poor control of the needle path are thought to be the main reasons for the vascular disruption of the chorionic plate, and thereby hypoxic embryo tissue damage. A better selection of cases, together with high-resolution vaginal ultrasound visualization, and analytical techniques requiring a minimal amount of tissue should avoid any teratogenic effect of early CVS. 相似文献
1000.