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Dissertations / Theses on the topic 'Safety instrumented system'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Moen, Henrik Finnema. "Reliability Assessment of Safety Instrumented Systems: An Application Example For A Ballasting System : Pålitelighetsvurdering av instrumenterte sikkerhetssystemer: Med anvendelsesområde for et ballasteringssystem." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21090.

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Ballast systems perform important safety functions on ships and floating facilities, and failure to ballast properly may lead to a major accident, involving multiple fatalities, release to environment and loss of vessel. Assessments are therefore needed to verify that the systems are sufficiently safe and reliable. The main objective of the thesis is to suggest a reliability assessment approach for ballast systems, including recommendations to how reliability requirements should be set for this type of system.A combination of literature surveys provide the background for the reliability assess

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2

Cavalheiro, André César Martins. "Sistema de controle para diagnóstico e tratamento de falhas em dispositivos de assistência ventricular." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-19092014-102819/.

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Atualmente, sabe-se que grande parte dos acidentes graves ocorridos envolvendo uma diversidade de sistemas como plataformas de petróleo, aeronaves ou plantas de processos industriais, poderiam ser evitados caso possuíssem dispositivos de controle projetados especificamente para manter a segurança durante a ocorrência de falhas no funcionamento dos mesmos. Por outro lado, observam-se complicações em realizar o controle de sistemas remotos em que é possível não haver garantia de monitoração em tempo real, como o caso de sondas espaciais ou robôs de exploração. Neste contexto, podem-se encontrar

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3

Souza, Jeferson Afonso Lopes de. "Mitigação de falhas críticas em sistemas produtivos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-12072016-073519/.

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O cenário competitivo e globalizado em que as empresas estão inseridas, sobretudo a partir do século XXI, associados a ciclos de vida cada vez menores dos produtos, rigorosos requisitos de qualidade, além de políticas de preservação do meio ambiente, com redução de consumo energético e de recursos hídricos, somadas às exigências legais de melhores condições de trabalho, resultaram em uma quebra de paradigma nos processos produtivos até então concebidos. Como solução a este novo cenário produtivo pode-se citar o extenso uso da automação industrial, fato que resultou em sistemas cada vez mais co

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4

Júnior, Reinaldo Squillante. "Diagnóstico e tratamento de falhas críticas em sistemas instrumentados de segurança." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-20032012-113746/.

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Sistemas Instrumentados de Segurança (SIS) são projetados para prevenir e/ou mitigar acidentes, evitando indesejáveis cenários com alto potencial de risco, assegurando a proteção da saúde das pessoas, proteção do meio ambiente e economia de custos com equipamentos industriais. Desta forma, é extremamente recomendado neste projeto de SIS o uso de métodos formais para garantir as especificações de segurança em conformidade com as normas regulamentadoras vigentes, principalmente para atingir o nível de integridade de segurança (S

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5

Kvam, Eva. "Effect of Safe Failures on the Reliability of Safety Instrumented Systems." Thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9809.

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<p>Safety instrumented systems (SISs) are of prime importance to the process industry to avoid catastrophic consequences or even loss of human life. The dangerous situations that any equipment may face should be analysed in order to quantify the associated risk and to choose a design of the SIS that reduces the risk to a tolerable level. The safe failure fraction (SFF) is a parameter defined in the standards IEC 61508 and IEC 61511, and is used to determine the need for additional channels that can activate the safety function if a failure is present. The standards consider a high SFF as an in

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6

Zhou, Jun. "Determination of Safety/Environmental Integrity Level for Subsea Safety Instrumented Systems." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23119.

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The master thesis describes, compares current methods in the literature, and proposes new methods for determination of safety/environmental integrity level of safety instrumented systems (SISs). These systems are used widely in many industry sectors to detect the onset of hazardous events and mitigate the consequences to humans, the environment and material assets. The main objective of this thesis has been to investigate the risk based approaches for determination of safety /environmental integrity level of SISs. The focus of the thesis is the risk graph and layer of protection analysis appro

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7

Brataas, Martin. "Management of the integrity of safety instrumented systems." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25523.

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The thesis consider management of safety instrumented systems/functions during the operational lifetime of the systems/functions. The location consider installations on the Norwegian continental shelf.The thesis suggest a framework for monitoring the variability of safety performance when maintenance is performed. The thesis identified the need to monitor this variability by performing a review on investigations performed by Petroleum Safety Authority Norway. The framework that was presented, if applied correctly would suggest, not to perform the specific maintenance activities, that resulted

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8

Jin, Hui. "A contribution to reliability assessment of safety-instrumented systems." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23397.

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Safety-instrumented systems (SISs) are among the most important and effective safety barriers in reducing the likelihood of hazardous events and/or mitigate their consequences to assets (humans, environment, and material assets). This PhD thesis focuses on the reliability of SISs. The overall objective of this PhD thesis has been to develop new methods and new concepts for reliability assessment of safety-instrumented systems. With the knowledge generated in this PhD project, the decision-makers are able to make more rational decisions related to SIS reliability in design, technology qualifica

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9

Lilleheier, Torbjørn. "Analysis of commom cause failures in complex safety instrumented systems." Thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8949.

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<p>Common cause failures (CCFs) have been an important issue in reliability analysis for several decades, especially when dealing with safety instrumented systems (SIS). Different approaches have been used in order to describe this CCFs, but the topic is still subject to much research and there does not exist a general consensus as to which method is most suitable for dealing with CCFs. The $beta$-factor model is the most popular method today, even though this model has some well-known limitations. Other, more complicated methods, are also developed to describe situations where the $beta$-fact

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10

Alizadeh, Siamak. "Reliability assessment of safety instrumented systems subject to process demand." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237653.

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Industry and society are now aware of risk more than ever before. Organisations whose activities pose risk to individuals and society are accountable to manage and reduce risk to an acceptable level. In this regard, utilisation of Safety Instrumented Systems (SISs) as an independent protection layer is a practical method of achieving the required risk reduction. The role of a SIS is to maintain the safety of equipment under control by providing a safety-related function. The International Standards, IEC 61508/61511, provide a set of guidelines to promote consistency for implementation of SISs

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11

Mbah, Rowland. "Using reliability growth testing to reveal systematic faults in safety-instrumented systems." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25525.

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This master thesis studies the effects of systematic faults in the development phase of a safety-instrumented system, especially the relation between systematic faults and operational common-cause failures. Safety-instrumented systems are used widely in many industry sectors to detect on the onset of hazardous events and mitigate the consequences to humans, the environment and material assets. Systematic faults are non-physical faults introduced due to design errors or mistakes. Unidentified systematic faults represent a serious problem, as their safety effects are unpredictable and are not n

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12

Torres-Echeverria, Alejandro C. "Modelling and optimization of Safety Instrumented Systems based on dependability and cost measures." Thesis, University of Sheffield, 2009. http://etheses.whiterose.ac.uk/106/.

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This thesis is centred on modelling and multi-objective optimization of Safety Instrumented Systems (SIS) in compliance with the standard IEC 61508. SIS are in charge of monitoring that the operating conditions of a plant remain under safe limits and free of hazards. Their performance is, therefore, critical for the integrity of people around the plant, the environment, assets and production. A large part of this work is devoted to modelling of SIS. Safety integrity and reliability measures, used as optimization objectives, are quantified by the Average Probability of Failure on Demand (PFDavg

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13

Lundteigen, Mary Ann. "Safety instrumented systems inthe oil and gas industry: : Concepts and methods for safety and reliability assessments indesign and operation." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5211.

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14

Bjartnes, Magnus Woll. "Provision and Updating of Estimates of Reliability Parameters for Use in Reliability Analyses of Safety-Instrumented Systems." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21075.

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Safety-instrumented systems are implemented in the industry to prevent accidents to occur and escalate. The blowdown system on a oil production ship is one example of such system. If a fire breaks out on the ship, the blowdown system's role is to remove the flammable gases from the current production lines on the ship. This is done by opening of the blowdown valves, that are installed on the different production lines. In this thesis, the blowdown system on a new Teekay ship, and espesically the valves, are applied as case. Since such systems are imporant to maintain the safety on the ins

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15

Mkhida, Abdelhak. "Contribution à l'évaluation de la sûreté de fonctionnement des Systèmes Instrumentés de Sécurité à Intelligence Distribuée." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL083N/document.

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L’incorporation des instruments intelligents dans les boucles de sécurité nous mène vers une sécurité intelligente et les systèmes deviennent des « systèmes instrumentés de sécurité à intelligence distribuée (SISID) ». La justification de l’usage de ces instruments dans les applications de sécurité n’est pas complètement avérée. L’évaluation de la sûreté de fonctionnement de ce type de systèmes n’est pas triviale. Dans ce travail, la modélisation et l'évaluation des performances relatives à la sûreté de fonctionnement des systèmes instrumentés de sécurité (SIS) sont traitées pour des structure

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16

Gambashidze, Nikoloz [Verfasser]. "Measuring Patient Safety Culture in Hospitals : Psychometric performance issues of translated and adapted instruments in different healthcare systems / Nikoloz Gambashidze." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1221669451/34.

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17

Mkhida, Abdelhak. "Contribution à l'évaluation de la sûreté de fonctionnement des Systèmes Instrumentés de Sécurité à Intelligence Distribuée." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL083N.

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L’incorporation des instruments intelligents dans les boucles de sécurité nous mène vers une sécurité intelligente et les systèmes deviennent des « systèmes instrumentés de sécurité à intelligence distribuée (SISID) ». La justification de l’usage de ces instruments dans les applications de sécurité n’est pas complètement avérée. L’évaluation de la sûreté de fonctionnement de ce type de systèmes n’est pas triviale. Dans ce travail, la modélisation et l'évaluation des performances relatives à la sûreté de fonctionnement des systèmes instrumentés de sécurité (SIS) sont traitées pour des structure

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18

Sallak, Mohamed. "Évaluation de paramètres de sûreté de fonctionnement en présence d'incertitudes et aide à la conception : application aux Systèmes Instrumentés de Sécurité." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL065N/document.

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L'introduction de systèmes instrumentés dédiés aux applications de sécurité impose l'évaluation de leur sûreté de fonctionnement. On utilise généralement pour cela les bases de données de fiabilité génériques. Cependant, le retour d'expérience pour ces systèmes qui présentent en général des défaillances rares est insuffisant pour valider les résultats obtenus. En outre, la collecte de données de fiabilité et leur extrapolation à d'autres composants introduisent des incertitudes. Les travaux de cette thèse portent sur la problématique de la prise en compte des incertitudes relatives aux données

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19

Linder, Jonas. "Indirect System Identification for Unknown Input Problems : With Applications to Ships." Doctoral thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134126.

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System identification is used in engineering sciences to build mathematical models from data. A common issue in system identification problems is that the true inputs to the system are not fully known. In this thesis, existing approaches to unknown input problems are classified and some of their properties are analyzed. A new indirect framework is proposed to treat system identification problems with unknown inputs. The effects of the unknown inputs are assumed to be measured through possibly unknown dynamics. Furthermore, the measurements may also be dependent on other known or measured inpu

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20

Sallak, Mohamed. "Évaluation de paramètres de sûreté de fonctionnement en présence d'incertitudes et aide à la conception : application aux Systèmes Instrumentés de Sécurité." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL065N.

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L'introduction de systèmes instrumentés dédiés aux applications de sécurité impose l'évaluation de leur sûreté de fonctionnement. On utilise généralement pour cela les bases de données de fiabilité génériques. Cependant, le retour d'expérience pour ces systèmes qui présentent en général des défaillances rares est insuffisant pour valider les résultats obtenus. En outre, la collecte de données de fiabilité et leur extrapolation à d'autres composants introduisent des incertitudes. Les travaux de cette thèse portent sur la problématique de la prise en compte des incertitudes relatives aux données

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21

Fulton, Neale Leslie Aerospace &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Regional airspace design: a structured systems engineering approach." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace and Mechanical Engineering, 2002. http://handle.unsw.edu.au/1959.4/38722.

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There has been almost fifteen years of political controversy surrounding changes to the rules and procedures by which aircraft conduct their flight within regional Australia. Decisions based on a predominately heuristic (rule of thumb) approach to design have had many adverse consequences for the integrity of the proximity warning function. A sound mathematical model is required to establish this function on a mature engineering foundation. To achieve this, the proximity warning function has been investigated as a hybrid-system. This approach recognises the dual nature of the design: that airc

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22

Dočkal, Tomáš. "Řídicí systém pro sestavovací a testovací automat elektroniky autosedaček." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219890.

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The thesis deals with definition of safety, traceability systems, creation of PLC programs for testing device control system and creation of Operator panel software. The thesis is divided into the machine specification and description, OP function description including function keys and the description of the control system with samples of the completed PLC program. The PLC program is written in STL and FBD language in STEP7. The conclusion describes functionality of the device.

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23

Maymont, Anthony. "La liberté contractuelle du banquier : réflexions sur la sécurité du système financier." Thesis, Clermont-Ferrand 1, 2013. http://www.theses.fr/2013CLF10425.

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La liberté contractuelle du banquier est une liberté parmi d’autres. Cependant, elle est la plus sensible dans lamesure où elle peut avoir des répercussions sur son activité. A priori sans limites aujourd’hui, cette liberté auraitmême des conséquences indéniables sur la sécurité du système financier en facilitant le phénomène des« bulles ». Le contrat, situé au coeur de l’activité bancaire et financière, serait ainsi la cause de cette réalité. Leschocs récents, telles les crises financières, imposent l´examen détaillé des opérations bancaires nationales maisaussi internationales, notamment cel

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24

Huang, Ying-hsi, and 黃英喜. "Applications of Safety Instrumented System on Petrochemical Plant." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/91134264538954635671.

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碩士<br>國立高雄第一科技大學<br>環境與安全衛生工程所<br>99<br>Since engineering safety is such a vital issue to the economy, the environment, human health and sustainable development, I propose to study engineering safety systems, in particular as they apply to the petrochemical industry. Safety systems in the petrochemical industry are designed to monitor the entire process commencing with feedstock input, and initiate the appropriate measures to prevent incidents or mitigate the losses caused by those incidents that do occur. Equipment such as process control, safety instrumentation systems, relief valves, dikes

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25

Gabriel, Angelito. "Funnel Risk Graph Method in the Design of Integrated Control and Safety System." Thesis, 2018. https://vuir.vu.edu.au/36843/.

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With the emergence of oil and gas industries such as the LNG industry in Australia, e.g., the Chevron’s US$54B Gorgon and Wheatstone projects, Inpex’s US$34B Ichthys, Shell’s US$12.6B Prelude FLNG, Origin’s $24.7B APLNG’s projects, to name a few, and other related industries, it is inevitable that these industries need to utilise risk analysis techniques during the development and application of their Safety Instrumented System (SIS), in order to efficiently and safely conduct its business, and for industry compliance. Currently, evaluation and design of integrated control and safety sy

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26

Greeff, Wilhelmina Johanna. "A proposed model and measuring instrument for internal safety communication: a longitudinal study in the South African mining and construction industries." Thesis, 2012. http://hdl.handle.net/10500/6890.

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As much as the mining and construction industries in South Africa have been the backbone of the South African economy since the discovery of gold at the turn of the 19th century, so too have they been responsible for most work-related deaths in their employee population, due to their inherent hazardous working conditions. It is for this reason that the governing bodies of these industries have started to clamp down on safety in organisations, legislatively ensuring that all organisations adhere to comparatively stringent and austere regulations, or face possible shutdown. Internal safety commu

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27

JUANG, MING-DER, and 莊明德. "A pplying system safety management to research the hazard of instrument and control system:the case of the thermal power plant of Taiwan Power Company." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/13229219306535126456.

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碩士<br>國立臺灣海洋大學<br>航運管理學系<br>95<br>Abstract By the progress of the computer science and digital technology, the application of digital instrument and control system to the industries has been matured. Nowadays, most of the domestic and foreign power plants have adopted the digital instrument and control system. However, the digital instrument and control system may cause the different failure mode comparing with the traditional analogical instrument and control system, these failure modes may affect instrument and control system and equipment crucially. In this regard, the related theory and t

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