Study On The Identification And Assessment Technology Of Major Hazard

The guiding of state -safety production is that safety is first and precaution is critical, major hazard identification and assessment are the important methods for preventing the seriously industrial accidents, which is also the premise to control and manage major hazard. The standard of major hazard identification is the foundation to implement the major hazard identification, adaptable and scientific assessment method is the way to the assessment result objective and practical.The aims studied in this paper are as follows:(1) Try to obtain the quantities on critical value through the study on the major hazard identification technology.(2) The new assessment method is put forward and then its math model is established through the study on the major hazard assessment technology.The contents and results studied in this paper are as follows:This paper, first based on the classification of hazard and major hazard, makes a heuristical study on assessment standard of critical value in hazard substance according to state standard (GB18218-2000)o The original energy and educed energy in the material are considered, and equivalent method and toxicity level method are put forward to make the method of critical value in hazard substance sure.Secondly, after analyzing the limitation of 2-demension assessment method, establishes 3-demension assessment method (probability ,severity and safety management), and calculates these demensions quantitatively.- Probability: Studies on the emerged accident probability of major hazard carrying the Markow process; Severity: By applying the grey system theory , on the base of the same kinds of accident-economy cost, establishes self-adapting GM (1,1) forecasting model and the model with the residual error being amended in a bid to calculate accident-economy cost;Safety management: Establishes the dynamic comprehensive analytical method on major hazard and safety management of the major hazard by applying the grey system theory and fuzzy math theory.Lastly, 3-demension assessment method is used, compared with the assessment results of method 2-demension one, results are as given: The risk degree major hazard is unchanged basically by using 2-demension or 3-demension assessment method .The change on risk degree shows the effect of safety management level to the whole fatalness.