Energy flow /barrier analysis, a novel view
نویسندگان
چکیده
In this paper, the principal concepts of the energy flow/barrier analysis are used to define an accident as a series of events including failure of the control and protective barriers, which results exposure of a target to a hazardous agent. “Barrier structure” is introduced, as a combination of serial and parallel barriers, to calculate the severity of risks of accidents. It is defined for each hazards and targets, separately, to identify the different accident processes. The accidents risk are estimated by using the barriers reliability and efficiency. This approach can be used to identify the different accidents scenarios and to recognize the more critical barriers.
منابع مشابه
A Novel Combinatorial Approach to Discrete Fracture Network Modeling in Heterogeneous Media
Fractured reservoirs contain about 85 and 90 percent of oil and gas resources respectively in Iran. A comprehensive study and investigation of fractures as the main factor affecting fluid flow or perhaps barrier seems necessary for reservoir development studies. High degrees of heterogeneity and sparseness of data have incapacitated conventional deterministic methods in fracture network modelin...
متن کاملEffect of a ring type barrier and rotational speed on leakage flow of gas turbine brush seal
This paper investigates the effect of inserting a ring type barrier on leakage flow of brush seals with different bristles clearances (the distance between bristle pack tip and rotor surface). The ring is placed on both upstream and downstream sides of the bristles. An axisymmetric CFD model is employed to calculate radial pressure distribution along backing plate, axial pressure variation on r...
متن کاملA novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance
In this paper, we propose and evaluate a novel design of a lightly doped drain and source carbon nanotube field effect transistor (LDDS-CNTFET) with a negative differential resistance (NDR) characteristic, called negative differential resistance LDDS-CNTFET (NDR-LDDS-CNTFET). The device was simulated by using a non equilibrium Green’s function method. To achieve this phenomenon, we have created...
متن کاملA novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance
In this paper, we propose and evaluate a novel design of a lightly doped drain and source carbon nanotube field effect transistor (LDDS-CNTFET) with a negative differential resistance (NDR) characteristic, called negative differential resistance LDDS-CNTFET (NDR-LDDS-CNTFET). The device was simulated by using a non equilibrium Green’s function method. To achieve this phenomenon, we have created...
متن کاملProposing a Novel Configuration for CGSs Aimed at Reducing Energy Consumption and Exergy Destruction
A CGS is of the most important parts in natural gas transmission pipelines in which the high inlet natural gas (NG) pressure is reduced to much lower value by employing a throttling valve. This pressure drop causes hydrate forming, preventing stable NG flow through the pipeline. To prevent hydrate forming, NG is usually preheated by heaters which burns remarkable amount of NG. In this work, a n...
متن کامل