Integrated safety assessment modeling and application

It is required to deal quantitatively with the uncertainty of information and ambiguities involved in the data for safety assessment modeling. In order to improve the reliability of results and practicability of system functionality, an integrated model of safety assessment for thermal power plants is proposed. The multi-hierarchy valuation structure is established on a basis of key influence factors for the thermal power plant safety. The weight of factors is calculated by fuzzy analytical hierarchy process (FAHP), the connection degree among the factors is obtained by set pair analysis (SPA) and the preponderant function of system safety is constructed for resolving the problem that systems safety preponderates over the weight sum of sub-systems safety. The immanence relation and nonlinear influence of safety factors in thermal power plants can be quantified. A case study that assesses the thermal power plant safety methods is presented to illustrate the use of the model and to demonstrate the capability of the model.