TY - CONF A1 - Wehrstedt, Klaus-Dieter T1 - Development of burning rate tests for liquid and solid organic peroxides T2 - 2014 Global Organic Peroxide Meeting CY - Washington, D.C., USA DA - 2014-05-13 PY - 2014 AN - OPUS4-30689 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter T1 - Pool fires - mixed involving organic peroxides T2 - 2014 Global Organic Peroxide Meeting CY - Washington, D.C., USA DA - 2014-05-13 PY - 2014 AN - OPUS4-30691 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Schröder, Volkmar T1 - Safety Related Properties of Gases - Division 2.1 ,,Gases, Gas Plants" T2 - Meeting at Korea Gas Saftey Cooperation CY - Chungchongbuk-do, South Korea DA - 2014-04-14 PY - 2014 AN - OPUS4-30693 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter T1 - Identifizierung gefährlicher exotherm zersetzlicher Stoffe T2 - DECHEMA-Weiterbildungskurs "Sicherheit chemischer Reaktionen" CY - Berlin, Germany DA - 2014-03-24 PY - 2014 AN - OPUS4-30448 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Krebs, Holger T1 - Explosion-resistant transport and storage containers T2 - IGUS EOS Meeting CY - Nanjing, China DA - 2014-04-09 PY - 2014 AN - OPUS4-30556 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Krebs, Holger A1 - Mücke, Olaf A1 - Schäfer, Diana A1 - Zöllner, Helmut T1 - A standard detonator in line with REACH T2 - IGUS EOS Meeting CY - Nanjing, China DA - 2014-04-09 PY - 2014 AN - OPUS4-30559 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Michael-Schulz, Heike T1 - A Serious Naval Accident - MSC Flaminia (Investigation Report) T2 - IGUS EOS Meeting CY - Nanjing, China DA - 2014-04-09 PY - 2014 AN - OPUS4-30560 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter T1 - Should Self-reactive Substances Type G be Candidates for Transport Division 4.2? T2 - Ad hoc EOS Meeting CY - Frankfurt am Main, Germany DA - 2014-01-28 PY - 2014 AN - OPUS4-30262 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Krischok, Frank T1 - Aktuelle Fragen zur Klassifizierung T2 - IAA-Symposium "Gefahrguttag: Aktuelle Entwicklungen im Gefahrgutrecht und Erhöhung der Sicherheit von Gefahrgutfahrzeugen (mit Demonstration)" CY - Hanover, Germany DA - 2014-09-29 PY - 2014 AN - OPUS4-31588 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Wilrich, Cordula T1 - Einstufung, Kennzeichnung und Verpackung von Stoffen und Gemischen T2 - Besuch einer chinesischen Delegation in der BAM (über die Europa Akademie, 64546 Mörfelden-Walldorf, Frankfurt/Main) CY - Berlin, Deutschland DA - 2014-12-16 PY - 2014 AN - OPUS4-32337 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wehrstedt, Klaus-Dieter A1 - Schälike, Stefan A1 - Vela-Wallenschus, Iris A1 - Schönbucher, A. T1 - Wechselwirkende KW- und Peroxid-Poolfeuer T2 - Sitzung ProcessNet Arbeitsausschuss "Reaktionstechnik sicherheitstechnisch schwieriger Prozesse" CY - Darmstadt, Germany DA - 2014-03-11 PY - 2014 N1 - Geburtsname von Vela-Wallenschus, Iris: Vela, I. - Birth name of Vela-Wallenschus, Iris: Vela, I. AN - OPUS4-30447 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Schönbucher, A. A1 - Wehrstedt, Klaus-Dieter A1 - Bockhorn, H. A1 - Schälike, Stefan A1 - Sebbar, N. T1 - Abschätzung des Gefahrenpotentials von wechselwirkenden Bränden beim Umgang mit entzündbaren und selbst zersetzlichen Flüssigkeiten in verfahrenstechnischen Anlagen - Schlussbericht zu dem IGF-Vorhaben Nr. 396 N2 - Mechanical drop test scenarios for Type B (U) packages according to the IAEA regulations have to be carried out onto the so-called “unyielding target” (usually with cask impact limiters) and onto the puncture bar respectively. They are predefined and do not require any further investigation of scenarios that really could happen on transportation routes. Cask accident scenarios in the framework of approval procedures for interim storage sites are derived from a detailed analysis of the handling procedures necessary from arrival of cask at the site to its storing position. In that case, casks are usually handled without impact limiters. Dependent on possible drop heights, drop positions and floor properties, conservative cask accident scenarios are derived for further safety proofs. According to the mechanical assessment concept of the considered approval procedure numerical calculations have to be provided by the applicant to demonstrate mechanical cask safety. Stresses and strains in the cask body as well as in the lid System have to be identified and assessed. Using the example of a 3-mvertical-drop of a transport and storage cask for spent fuel elements onto the floor construction made of damping concrete covered by screed, BAM developed a finite element model. The finite element code ABAQUS/Explicit™ was used. Results of experimental investigations are not available. Therefore parameter studies are necessary to identify the sensitivity of the finite element model to significant Parameters and to verify the finite element models according to the requirements of the Guidelines for the Numerical Safety Analyses for the Approval of Transport and Storage Casks for Radioactive Materials (BAM GGR-008). The paper describes the modeling of the material behavior and attachment of bottom side cask components. Questions concerning the modeling of a crack length limiting reinforcement in the screed layer are discussed. The influence of the mesh density of the screed layer and its strength is considered as well. Finally, the developed finite element model can be used for a numerical safety assessment. It can help to understand the complex mechanisms of the interaction between the cask components and floor construction. PY - 2014 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-317195 DO - https://doi.org/10.13140/2.1.4328.1928 SP - 1 EP - 47 PB - DECHEMA CY - Frankfurt am Main AN - OPUS4-31719 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rosenberg, Marika A1 - Michael-Schulz, Heike A1 - Wehrstedt, Klaus-Dieter A1 - Malow, Marcus T1 - Validation of the UN test method N.5 N2 - Many substances react with water in such a way that flammable gases are formed. For transport issues this reaction may possess a considerable hazard especially if the cargo is wetted by rain or by water from other sources. In the UN Recommendations on the Transport of Dangerous Goods these kinds of problems are addressed. The UN test N.5 'Test method for substances which in contact with water emit flammable gases' corresponds to this hazard. Classification according to the test method is done by measurement of the gas evolution rate of the flammable gas by any suitable procedure. At BAM a gravimetric approach is used to measure the gas evolution rate. In this paper we present the evaluation of the apparatus by means of an absolute calibration routine utilizing a reaction where a known amount of gas is produced as well as the evaluation of important parameters influencing the gas evolution rate using different substances. It can be shown that the apparatus is capable of measuring absolute gas volumes as low as 6 mL with an acceptable error of about 17% as determined from the reaction of Mg with demineralized water. KW - UN test N.5 KW - Water reactive substance KW - Flammable gas KW - Magnesium KW - Aluminum KW - Hydrogen PY - 2014 DO - https://doi.org/10.1016/j.jlp.2014.03.008 SN - 0950-4230 SN - 1873-3352 VL - 30 SP - 282 EP - 286 PB - Butterworth CY - Guildford, Surrey AN - OPUS4-31037 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter A1 - Krebs, Holger T1 - Amuay refinery disaster: The aftermaths and challenges ahead N2 - Amuay refinery disaster (2012) is another recent example of Vapor Cloud Explosion (VCE) and fire accidents preceded by Buncefield (2005), Puerto-Rico (2009) and Jaipur (2009), respectively [9]. The incident has left many safety issues behind which must be repeatedly addressed. Unfortunately, the lessons taught by previous similar events are just not understood carefully. It reveals that the proper safety measures for such facilities were either underestimated or were not accounted seriously. Consequently, the resulting overpressures from explosion and the subsequent thermal radiation from tank fires have once again proved to be disastrous to both mankind and infrastructure. This article highlights the aftermaths of Amuay incident and addresses the challenges put forward by it. Furthermore, a comparative study is performed between such incidents to analyze the similarities and how they could have been avoided. KW - Refinery disaster KW - Vapor cloud explosion KW - Fire KW - Safety distance KW - Overpressure KW - Radiation PY - 2014 DO - https://doi.org/10.1016/j.fuproc.2013.10.025 SN - 0016-2361 SN - 0378-3820 SN - 1873-7153 VL - 119 SP - 198 EP - 203 PB - Elsevier CY - Amsterdam AN - OPUS4-29816 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter T1 - Spill-over characteristics of peroxy-fuels: Two-phase CFD investigations N2 - Two-phase CFD (Computational Fluid Dynamics) model for characterising the spill-over/dispersion of peroxy-fuels is presented. The model is independent of type and burning rate of the spilled/dispersed fuel and considers only overflow Reynolds number (Re) to characterise the spill/dispersion behaviour. Additional simulations are performed for LNG (Liquified Natural Gas) dispersion and it is found that the model can be used for different fuels within a defined range of Re. Different scenarios with Re = 100 to 3 × 105 are investigated covering a wide range of mass flow rates, opening sizes and viscosities. Depending on Lower Flammability Limits (LFL) of the fuels spill/dispersion (vapour cloud) diameters (DCFD) and heights (hCFD) are predicted. A generalised correlation between DCFD and Re is established to predict the dispersion occurring at varying scales. The model is validated by: (1) conducting an extensive grid independent study; (2) comparing the results with the existing analytical methods and (3) comparing against the standard field test data on LNG dispersions. KW - Spill-over KW - Dispersion KW - Peroxy-fuels KW - CFD KW - Reynolds number KW - Liquefied natural gas PY - 2014 DO - https://doi.org/10.1016/j.jlp.2014.02.014 SN - 0950-4230 SN - 1873-3352 VL - 29 SP - 186 EP - 197 PB - Butterworth CY - Guildford, Surrey AN - OPUS4-30481 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter T1 - Rheinland refinery accident 2014: CFD prediction of atmospheric dispersion of smoke N2 - Industrial fire and explosion hazards are most often also associated with the dispersion of toxic substances. These substances can be gases, liquids, solids or in form of aerosols. The critical toxic exposure limits to People and enviroment from such substances are regulated by the concerned authorities of the countries. In order to comply with the defined regulation estimation of such critical limits must be carried out by different semi-empirical and phenomenological models/methods for risk assessment. Many of such methods provide a qualitative estimation of time and space dependent extrimities of toxicity. The overwhelm development of computational capacity has made it possible to perform Computational Fluid Dynamics (CFD) simulation by solving the three-dimensional transport equations for mass momentum and species in lower and upper atmosphere, respectively. CFD simulation not only provides a detailed 3D distribution of toxic particulates/gases in the neighbourhood of the plant but also helps to study the worst-case sceanrios. In the past several small- and large-scale accidents occured in oil and gas plants in different parts of the world including the recent one in Rheinland refinery near Cologne in Germany. This work deals with this accident and provides a methodology to predict the critical exposure limits of smoke emitted by a toluene tank fire by means of CFD simulation. T2 - COMBURA 2014 - Combustion research and application symposium CY - Soesterberg, The Netherlands DA - 08.10.2014 KW - CFD KW - Retinery incident KW - Smoke dispersion PY - 2014 SP - 56 EP - 57 AN - OPUS4-31721 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Malow, Marcus A1 - Wehrstedt, Klaus-Dieter A1 - Schuurman, P. A1 - Hoeijmakers, P.M.M. T1 - Comments on 'thermal decomposition kinetic evaluation and its thermal hazards prediction of AIBN, by S. Guo, W. Wan, C. Chen and W.H. Chen' (Journal of thermal analysis and calorimetry (2013) 113:1169-1176, DOI 10.1007/s10973-013-2993-7) N2 - We read the paper by Guo et al. [1] with interest. The authors have investigated the thermal decomposition kinetics and thermal hazards of 2,2′-azobis(isobutyronitrile), AIBN, by differential scanning calorimetry (DSC) and used the Advanced Kinetics and Technology Solutions (AKTS) software to predict the thermal stability of AIBN in ton and kg scale. The main conclusion of interest is that the self-accelerating decomposition temperature (SADT) of a 50-kg standard package is 63 °C. PY - 2014 DO - https://doi.org/10.1007/s10973-014-3897-x SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 117 IS - 3 SP - 1015 EP - 1016 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-31251 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Krause, G. A1 - Wehrstedt, Klaus-Dieter A1 - Malow, Marcus A1 - Budde, K. A1 - Mosler, J. T1 - Safe transport of acrylic acid in railroad tank cars. Part 1: Determination of the self-accelerating decomposition temperature N2 - Experiments according to a test specified in the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, and numerical simulations by means of a finite element method are employed to determine the self-accelerating decomposition temperature of acrylic acid in a railroad tank car. The results demonstrate that the transport of acrylic acid in big tank cars is safe as long as some basic conditions are taken into account. KW - Acrylic acid KW - Dangerous goods KW - Finite element method KW - Railway transport KW - Self-accelerating decomposition temperature PY - 2014 DO - https://doi.org/10.1002/ceat.201300778 SN - 0930-7516 SN - 1521-4125 VL - 37 IS - 9 SP - 1460 EP - 1467 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-31298 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -