Risk assessment of piping support systems

Předkládaný článek se věnuje stručnému popisu metodiky hodnocení rizika uložení potrubních systémů. Pod pojmem uložení jsou myšleny veškeré prvky, které vymezují potrubní systém v prostoru. Rizikové hodnocení uložení bylo vytvořeno za účelem posouzení rizikovosti jednotlivých komponent uložení (závěsy, podpěry, tlumiče atd.) a ohodnocení jejich aktuálního technického stavu. Metodika je nastavena tak, že pro hodnocení rizika uložení potrubního systému je potřeba vytvořit / získat souhrn informací, které se týkají provedení uložení, technického stavu uložení a potenciálních dopadů poškození uložení potrubního systému. Každá získaná informace je poté v rámci hodnotícího procesu ohodnocena patřičným rizikovým skóre, ze kterého jsou následně vypočteny indexy použité při výsledném hodnocení rizika a technického stavu uložení. Podle úrovně výsledného rizika jsou následně definována opatření pro snížení rizika jednotlivých komponent uložení. Cílem hodnocení je snaha docílit stavu, kdy bude znám technický stav každé komponenty uložení na daném potrubním systému a také, aby jednotlivé komponenty uložení nepředstavovaly pro bezpečný provoz potrubního systému výrazné riziko.The presented article deals with a brief description of the methodology of pipeline support risk assessment. The term pipeline support means all elements that define the pipeline system in a power plant area. The risk assessment of the pipeline support was created to assess the risk of individual support components (hangers, supports, shock absorbers, etc.) and to assess their current technical condition. Idea of methodology is that it is necessary to create and to obtain a summary of information about of the pipeline support design, the pipeline support technical condition and the potential impacts of pipeline support damage. Each information obtained due to survey is then evaluated by the appropriate risk score, from which the evaluation indexes are calculated. The evaluation indexes are then used for risk and risk matrix expression. When the risks and risk matrix of pipeline support are evaluated, appropriate steps are designed in order to reduce the risk of each pipeline support component. The aim of the methodology (survey process) is to achieve a state when the technical condition of each pipeline support component on a given pipeline system is known and also that none of individual pipeline support component do not pose a significant risk to the safe operation of the pipeline system

The impact of car park fire on concrete structure, Parallel computation

This study examines the influence of automobile fire in a car park on concrete parts of the structure. In 2009, a series of full-scale fire experiments in open air was conducted, including the fire in automobile interior and its influence onto a vehicle in its vicinity. We performed a set of simulations of this scenario, using the NIST FDS system, version 5.5.3. Comparison with experimental data confirmed the simulation reliability. In this paper, we use material properties of car interior materials established by our research to simulate a car fire in a small part of car park containing two burning cars and its influence on concrete ceiling and a pillar in the vicinity of the cars. We use here the calculation with 48 and more MPI processes to evaluate the ability of high performance computing to solve problems of structural fire safety

Parallel Computer Simulation of Fire in Road Tunnel and People Evacuation

Advances in CFD (Computational Fluid Dynamics) and significant increase of computational power of current computers have led to widespread use of CFD in aerodynamics, fluid dynamics, combustion engineering and other academic disciplines. One of such disciplines is computer modelling and simulation of fire in human structures. Fire is a very complicated and complex phenomenon. Fire research deals with such processes as combustion, radiation, heat transfer, turbulence, fluid dynamics, and other physical and chemical processes. Several advanced fire and smoke simulation systems have been developed to solve various aspects of fire safety in various conditions and environments. In this paper, the use of parallel version of the CFD simulator FDS (Fire Dynamics Simulator) for the simulation of fire spread and smoke development in a short road tunnel is described. In order to study the impact of the computational domain decomposition on the accuracy and reliability of simulation results, several simulations of a chosen fire scenario ran on the HP blade cluster utilizing different numbers of processors. The obtained parameters of fire and smoke were used to investigate the influence of the fire on people evacuation in the tunnel with active ventilation for a given traffic situation

Zhodnocení výkonnosti vybraných finančních nástrojů a akciových indexů

Performance evaluation of selected financial tools and stock market indexes. Bachelor thesis. Brno: Mendel University, 2016. The bachelor thesis focuses on mutual comparison of equity mutual funds and exchange traded fund which copy a stock index. The literature review is dedicated to assumptions which are subject to the existence of efficient market behavior, collective investment and assessment criteria. The main aim of this thesis, based on the historical data analysis, is to verify the possibility of outperforming a benchmark by active fund management. Results will be compared with conception Efficient market theory. Criteria will be returns, volatility and transaction costs

Identifikace imperfekcí a hodnocení flexibility trhů práce vybraných zemí EU

This diploma thesis aims to estimate the level of wage flexibility in 12 selected countries of the European Union. Countries are divided into three groups: countries of Central and Eastern Europe (CEE), countries of the core and countries of periphery. The approach used is based on the institutional set-up of the labor market, where a comprehensive index is created for the assessment of institutional characteristics. To estimate the real wage elasticity, a macroeconomic method based on the Phillips curve is used, which is also the second approach. The results show that the countries of the core have a higher degree of flexibility on the labor market, even though the institutional setting promotes wage flexibility in CEE countries more

Risk assessment of piping support systems

Předkládaný článek se věnuje stručnému popisu metodiky hodnocení rizika uložení potrubních systémů. Pod pojmem uložení jsou myšleny veškeré prvky, které vymezují potrubní systém v prostoru. Rizikové hodnocení uložení bylo vytvořeno za účelem posouzení rizikovosti jednotlivých komponent uložení (závěsy, podpěry, tlumiče atd.) a ohodnocení jejich aktuálního technického stavu. Metodika je nastavena tak, že pro hodnocení rizika uložení potrubního systému je potřeba vytvořit / získat souhrn informací, které se týkají provedení uložení, technického stavu uložení a potenciálních dopadů poškození uložení potrubního systému. Každá získaná informace je poté v rámci hodnotícího procesu ohodnocena patřičným rizikovým skóre, ze kterého jsou následně vypočteny indexy použité při výsledném hodnocení rizika a technického stavu uložení. Podle úrovně výsledného rizika jsou následně definována opatření pro snížení rizika jednotlivých komponent uložení. Cílem hodnocení je snaha docílit stavu, kdy bude znám technický stav každé komponenty uložení na daném potrubním systému a také, aby jednotlivé komponenty uložení nepředstavovaly pro bezpečný provoz potrubního systému výrazné riziko.The presented article deals with a brief description of the methodology of pipeline support risk assessment. The term pipeline support means all elements that define the pipeline system in a power plant area. The risk assessment of the pipeline support was created to assess the risk of individual support components (hangers, supports, shock absorbers, etc.) and to assess their current technical condition. Idea of methodology is that it is necessary to create and to obtain a summary of information about of the pipeline support design, the pipeline support technical condition and the potential impacts of pipeline support damage. Each information obtained due to survey is then evaluated by the appropriate risk score, from which the evaluation indexes are calculated. The evaluation indexes are then used for risk and risk matrix expression. When the risks and risk matrix of pipeline support are evaluated, appropriate steps are designed in order to reduce the risk of each pipeline support component. The aim of the methodology (survey process) is to achieve a state when the technical condition of each pipeline support component on a given pipeline system is known and also that none of individual pipeline support component do not pose a significant risk to the safe operation of the pipeline system

Impacts of hydrometeorological extremes in the Bohemian-Moravian highlands in 1706-1889 as derived from taxation records

Taxation records related to tax relief for farmers whose livelihoods were affected by hydrometeorological extremes (HMEs) on seven estates in the Bohemian-Moravian Highlands (Moravia) in the 1706-1889 period are used to study the impacts of HMEs on the socio-economic situation of the farmers. The impacts of HMEs are here classified into agricultural production, material property and the socio-economic situation of individual farmers. Direct impacts took the form of losses of property, supplies and farming equipment, and also of bad yields, depletion of livestock and damage to fields and meadows. Simple lack of income, debt, impoverishment, reduction in livestock and deterioration in field fertility were among the longer-term effects. The impacts are discussed with respect to approaches to mitigation of the negative effects of HMEs and to the problems associated with obtaining support and in terms of a hierarchy of consequent impacts. The paper embodies a methodological approach for analysis of HMEs impacts in South Moravia in the 17th-19th centuries.46548

Modelling of impact of road tunnel fire on evacuation

Požiar auta v cestnom tuneli patrí k mimoriadnym udalostiam, ktoré môžu zapríčiniť veľké materiálne škody a poškodenie tunela, jeho následnú odstávku a ohroziť život a zdravie osôb v tuneli. V tomto príspevku ilustrujeme počítačovú simuláciu požiaru a jeho vplyvu na evakuáciu osôb vo fiktívnom jednosmernom cestnom tuneli s pozdĺžnym vetraním. Na simuláciu požiaru a modelovanie evakuácie je použitý programový systém FDS (Fire Dynamics Simulator), ktorého súčasťou je evakuačný modul Evac. Priamy prístup k výsledkom simulácie priebehu požiaru umožňuje systému modelovať vplyv požiaru na individuálne a skupinové správanie a únikové stratégie evakuovaných osôb.Car fire in road tunnel belongs to emergency events which can cause large material damages and tunnel shut down. Such fire can endanger people’s lives and health. In this paper, computer simulation of fire and its impact on evacuation in a single-directional road tunnel with longitudinal ventilation is illustrated. FDS (Fire Dynamics Simulator) with Evac (evacuation module) is used for simulation of fire and modelling evacuation in the tunnel. Direct access to simulation results of fire course enables the system to model impact of fire on individual and group behaviour and escape strategies of passengers

Climatic and other responses to the Lakagígar 1783 and Tambora 1815 volcanic eruptions in the Czech Lands

Using documentary data and long-term temperature and precipitation series for the years 1775-2007, climatic, weather and other phenomena in the Czech Lands following the 1783 Lakagıgar eruption in Iceland and the 1815 Tambora eruption in Indonesia are investigated. The Lakagıgar eruption had clear post-volcanic effects on the weather in central Europe (dry fog, heavy thunderstorms, optical phenomena), with the occurrence of significant cold temperature anomalies in winter 1783/84, spring 1785 and the summer and autumn of 1786. The Tambora eruption was not accompanied by any particular weather phenomena, but was followed by an extremely cold summer in 1816. A comparison of the two eruptions shows that the effects of the Lakagıgar eruption were climatologically stronger than those of the Tambora eruption.14716

Measurements and fire simulation models in road tunnels

Ventilation system of road tunnel is one of the most important parts of the tunnel safety equipment, especially in view of the emergency event in the tunnel with fire. Last year we presented the testing and the first in situ measurements of our project entitled “Models of formation and spread of fire to increase safety of road tunnels”. With regard to our project schedule we performed also the second in situ experiment. Other part of this paper deals with computer simulations of fires of a selected Slovak road tunnel