http://hdl.handle.net/2117/3157 2013-06-20T07:55:51Z http://hdl.handle.net/2117/18344 Title: Risk Assessment of water effluents in Catalan (NE Spain) waste-water treatment plants based on E-PRTR data Authors: Ginebreda, A.; Guillén, Daniel; Martínez, E.; Darbra Roman, Rosa Maria; Agueda Costafreda, Alba; Barceló, D.; Moragas, Lucas; Robusté, Jordi 2013-03-15T11:23:59Z http://hdl.handle.net/2117/15831 Title: Design optimization of storage facilities taking into account the domino effect Authors: Bernechea, Esteban; Arnaldos Viger, Josep Abstract: Storing hazardous substances is a process that entrails high risk, and in which many resources are spent in the planning of safety measures; however, safety could be included at the initial stages of the design of this type of installations, by optimizing the number of tanks that are used to store the substance. The effects and consequences of major accidents are directly proportional to the mass of materials involved in them; therefore, if the mass was divided in more containing units, the consequences at the moment of an accident occurrence would be lesser. However, as more units are used to store a dangerous substance in an installation, the risk of domino effect occurrence at the moment of an accident also increases. The objective of this paper is to develop a methodology that allows finding the optimum number of units that have to be used to store dangerous materials, taking the possibility of domino effect occurrence into account. The proposed methodology is described and applied to a case study as a decision making tool, obtaining results that demonstrate that the design of storage installations can be improved from a risk point of view, by combining quantitative risk analysis and optimization techniques. 2012-05-11T10:28:59Z http://hdl.handle.net/2117/15830 Title: Multi-objective optimization of hazardous substance storage facilities. The decision between risks and costs associated to the project Authors: Bernechea, Esteban; Zamarripa, Miguel; Arnaldos Viger, Josep Abstract: The design storage installations for dangerous substances can be optimized from a safety and risk point of view by combining quantitative risk analysis and mathematical optimization techniques; the consequences of accidents are directly proportional to the mass involved in them, which means that in a storage installation, if the totality of the stored substance is divided into more tanks, the consequences when an accident occurs in any of the units will be less significant than if all the mass was stored in one tank (in installations where there is low possibility of domino effect occurrence). However, as more tanks are used to store the mass, the economical investment will also increase; then, a situation arises between two conflicting objectives, that can be solved through the use of multi objective optimization. 2012-05-11T10:21:57Z http://hdl.handle.net/2117/15670 Title: Main features and mathematical modelling of flash fires Authors: Villafañe, Diana; Darbra Roman, Rosa Maria; Casal Fàbrega, Joaquim 2012-03-27T11:06:50Z http://hdl.handle.net/2117/12693 Title: Flash fire: historical analysis and modeling Authors: Villafañe, Diana; Darbra Roman, Rosa Maria; Casal Fàbrega, Joaquim 2011-06-02T09:11:20Z http://hdl.handle.net/2117/8892 Title: A proposal of generic event trees and probabilities for the release of different types of hazardous materials Authors: Vílchez Sánchez, Juan Antonio; Espejo, V.; Casal Fàbrega, Joaquim Abstract: Abstract: In quantitative risk analysis usually generic hypothesis concerning the loss of containment initiating events are applied, in order to simplify the analysis. For example, for the loss of containment from a storage tank: instantaneous release of the complete inventory, continuous release of the complete inventory in 10 min and continuous release from a hole with a diameter of 10 mm. Once these initiating events specified, it is necessary to develop the corresponding event trees to establish which are the different sequences –depending on the properties of the released material, the existing safety barriers, etc.– leading from each initiating event to the diverse final outcomes or accident scenarios. In this communication a set of generic short event trees are proposed for the main cases which can be found, as a function of the type of hazardous material released. Values for the corresponding intermediate probabilities (immediate ignition, delayed ignition, flame front acceleration, BLEVE, etc.) are also proposed, following both a literature survey and expert judgment. 2010-09-16T07:48:25Z http://hdl.handle.net/2117/8891 Title: Thermal and geometrical features of jet fires Authors: Palacios, Adriana; Gómez-Mares, Mercedes; Casal Fàbrega, Joaquim Abstract: Abstract: In many severe accidents involving explosions or large fires, jet fires have been the first step of a domino effect sequence: a recent historical analysis has shown that among the accidents registered in the data bases, in approximately 50% of the cases in which it was a jet fire it caused another event with severe effects. However, the knowledge of jet fires essential features –behaviour, effects– is still rather poor. In this communication, the results obtained with relatively large jet fires (with flame length up to 10 m) are discussed. The fuel was propane, and both sonic and subsonic jet exit velocities were obtained from different outlet diameters. The distribution of the temperatures of the flame main axis was measured with a set of thermocouples. The jet fires were filmed with a videocamera registering visible light (VHS) and a thermographic camera (IR). The main flame geometrical features were analyzed as a function of the jet main variables, as well as the thermal effects (thermal radiation intensity as a function of distance). 2010-09-16T07:39:37Z http://hdl.handle.net/2117/7201 Title: Experimental methodology for characterizing flame emissivity of small scale forest fires using infrared thermography techniques Authors: Pastor Ferrer, Elsa; Rigueiro, A; Zárate López, Luis; Giménez, A; Arnaldos Viger, Josep; Planas Cuchi, Eulàlia Abstract: An experimental methodology based on thermography techniques has been developed and implemented with the aim of finding emissivity values of forest fuel flames. In this paper, previous works by different authors are discussed and theoretical fundamentals of heat transfer by radiation and of infrared thermography on which experimental method relies are briefly described. Then, designed methodology, equipments, devices and experimental tests are detailed in depth. Finally, analysis procedure is pointed out and some conclusions from the study of theresults are announced. 2010-05-13T10:55:04Z http://hdl.handle.net/2117/7199 Title: Aerial suppression experiments in Ngarket conservation park Authors: Plucinski, M; Gould, J; Pastor Ferrer, Elsa; Planas Cuchi, Eulàlia; Pérez Ramírez, Yolanda; McCarthy, G 2010-05-13T10:21:21Z http://hdl.handle.net/2117/6991 Title: Dimensional and scale analysis in forest fire modeling Authors: Pérez Ramírez, Yolanda; Agueda Costafreda, Alba; Pastor Ferrer, Elsa; Planas Cuchi, Eulàlia Abstract: The aim of this work is to discuss about the use of Dimensional and Scale Analysis in forest fires modeling. 2010-04-20T08:34:17Z http://hdl.handle.net/2117/6948 Title: Computing aerial suppression effectiveness by IR monitoring Authors: Pérez Ramírez, Yolanda; Gould, J; Pastor Ferrer, Elsa; Planas Cuchi, Eulàlia; Plucinski, M Abstract: This paper describes the methodology developed to analyse the IR images obtained during the aerial suppression experiments that were conducted in Ngarkat Conservation Park, South Australia, on 3-5 March 2008. This methodology has been specifically developed in order to be able to extract the maximum information from the IR images taken from an observing helicopter, in those tests were chemical suppressants are applied directly on the fire, although it could eventually be applied to other similar situations. The information obtained after applying this methodology allows quantifying the aerial suppression effectiveness. 2010-04-15T11:43:39Z http://hdl.handle.net/2117/6396 Title: Flame structure modeling in forest fires Authors: Domènech Jardí, Ruth; Pastor Ferrer, Elsa; Pérez Ramírez, Yolanda; Planas Cuchi, Eulàlia Abstract: This work in progress presentation wants to summarize the work done in flame modeling applied so far to forest fires and to present the on-going efforts at empirical and physical level that CERTEC is devoting to reach in a near future the goals set in this subject. We are distinguishing here two different approaches depending on whether flame modeling is based on spreading fires or on stationary fires. 2010-02-17T10:43:44Z http://hdl.handle.net/2117/6275 Title: Safety culture and hazard risk perception of Australian and New Zealand maritime pilots Authors: Darbra Roman, Rosa Maria Abstract: A survey of the safety culture and hazard risk perception has been carried out involving 77 maritime pilots around Australia and New Zealand, representing more than the 20% of the maritime pilots in each country, in proportional geographic distribution. In 82% of the cases, interviews were carried out face to face. Each interview was based on a questionnaire designed to be completed in less than one hour. Questions on four different aspects were asked, relating to each pilot’s professional background, safety culture and perception of risks, navigation and pilotage hazards and their perception of the pilot’s role. The main responses in addition to the most interesting comments highlighted by the pilots are presented in this paper. Finally, the paper makes recommendations which might be considered for improving operational performance and safety of navigation. 2010-02-01T16:05:56Z http://hdl.handle.net/2117/6266 Title: SDM: application and training for the port employees Authors: Darbra Roman, Rosa Maria; Casal Fàbrega, Joaquim 2010-02-01T11:48:10Z http://hdl.handle.net/2117/6265 Title: Ports Persperctives and environmental management considerations Authors: Darbra Roman, Rosa Maria 2010-02-01T11:30:49Z