Assessment of the adequacy of safety barriers to hazards

Sobral, J.; Soares, C. Guedes

doi:10.1016/j.ssci.2018.12.021

Cited by 23 publications

(20 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless it was not further considered in the article and this approach can be further investigated. Taking into account the principle introduced in [33], which stipulates that the risk related to technical systems, with a plausible likelihood of catastrophic consequences as a direct result of a breakdown, does not need to be further reduced if the frequency of such breakdowns equals or is lower than 10-9 per hour of the system's working time. On the basis of the above mentioned activities, the required SIL and THR have been assigned to every function of the system, instead of, like it was the case in earlier analyses made by the infrastructure manger, to the system as a whole.…”

Section: Discussionmentioning

confidence: 99%

Method for Selecting the Safety Integrity Level for the Control-Command and Signaling Functions

et al. 2019

View full text Add to dashboard Cite

The purpose of the article is to present selected method of risk assessment of railway control and signaling systems, including current normative and legal bases, such as directives and regulations that regulate the interoperability and safety of the railway system. Selected methods used at the initial stage of creating safety requirements and referring to the initial definition of the system defined at a high level of abstraction are considered. Issues of holistic approach and residual risk management are also discussed. Risk models are presented as well as individual steps of risk analysis, evaluation, and assessment, including hazard identification, impact analysis, and selection of the risk acceptance principle. Selected model based on hazard and operability studies (HAZOP) and an adapted risk graph was applied to the real signalling equipment. The key aspect undertaken in the article is the proposal to set quantitative safety objectives based on the safety integrity level/tolerable hazard rate (SIL/THR) indicator, as an important parameter in further analysis of the system, especially in computer applications. The result of study showed that application of proposed combination HAZOP and adapted risk graph method are efficient and suitable for a railway signalling application. The results and conclusion are presented in Chapters 4 and 6 of the article.

show abstract

Section: Discussionmentioning

confidence: 99%

Method for Selecting the Safety Integrity Level for the Control-Command and Signaling Functions

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The performance of safety barriers determines whether an incident will occur and develop into an accident, which may affect people, property, and the environment (Sobral and Soares, 2019)). The evaluation of safety barrier performance is essential to ensure system safety.…”

Section: Introductionmentioning

confidence: 99%

“…The traditional risk assessment alone is considered inadequate to ensure a complex system's safety (Park et al, 2013;Tong et al, 2020). Many recent studies have proposed methods and indicators for safety barrier performance evaluation (e.g., see Kang et al, 2016;Sobral and Soares, 2019). However, the hazards in complex systems have high uncertainty, making these static indicators challenging to quantify the performance of the safety barrier system.…”

Section: Introductionmentioning

confidence: 99%

Resilience-based approach to safety barrier performance assessment in process facilities

Sun

Wang

Yang

et al. 2021

Journal of Loss Prevention in the Process Industries

View full text Add to dashboard Cite

“…

orcid.org/0000-0002-9745-9453 WSTĘP Drogowe bariery ochronne oraz inne bariery, mają funkcję zapobiegawczą (zmniejszania prawdopodobieństwa wystąpienia) lub ochronną (zmniejszającą dotkliwość konsekwencji) i powinny być adekwatne do konkretnego ryzyka [5,9,22,39, 41]. Ogólnie, bariery ochronne to systemy fizyczne i techniczne lub jest to działanie człowieka oparte na konkretnych procedurach lub kontrolnych decyzjach administracyjnych, związane ze sposobem, w jaki funkcja bezpieczeństwa jest realizowana np.

…”

unclassified

“…projekt ARAMIS [8, 17,47]. Jeśli te funkcje nie zostaną spełnione, oznacza to awarię bariery bezpieczeństwa, która w większości przypadków powoduje katastrofalne skutki dla ludzi, mienia lub środowiska [19,39]. Zasadnicze znaczenie ma zapewnienie wysokiej dostępności barier bezpieczeństwa oraz spełnienie dużej niezawodności ich elementów, aby utrzymać ryzyko w dopuszczalnych granicach.…”

unclassified

Analysis of the Impact of Road Safety Barriers on Reducing the Risk of Dangerous Road Accidents and Their Consequences

Savostin-Kosiak¹,

Michalski²

2020

NTUB

View full text Add to dashboard Cite

The weaknesses of the road systems were analyzed, including dangerous events generated by vehicle getting out of the road and consequent secondary dangerous events such as: driving over a barrier or other dangerous object located next to road or roofing of the vehicle. Particularly, the security, availability of technological solutions for protection barriers, columns and road signs on roads and bridges were considered. The preventive and protective functions of road equipment and engineering objects are given, which are adequate to the specific risk. Failures of safety barriers and road protection barriers and the consequences of their failures for people, properties and the environment were analyzed. Solutions for the construction of road barriers were analyzed in terms of: availability, the degree of reliability of their components and the possibility of maintaining risk within acceptable limits. The scope of fulfillment of required functional features, design methods, modern technological solutions, test methods and certification procedures were analyzed. Functional features of protective barriers regarding: the protection level, displacements and the level of impact intensity were taken into account. Literature point of view on aided design of protective barriers has been included which covers finite element method (method of sum of displacements) with appropriate analysis of forces, torques and displacements with CAD systems including use of LS-DYNA system for events and damage parameters. A large part of the publication deals with modern technological solutions and analyzes including design of protective barriers, modeling of their elements as well as modeling collisions with vehicles, taking into account the impact of the ground. KEYWORDS: PROTECTION BARRIERS, FAILURES OF PROTECTION BARRIERS, DESIGN METHODS, SECURITY OF PROTECTION BARRIERS

show abstract

Assessment of the adequacy of safety barriers to hazards

Cited by 23 publications

References 37 publications

Method for Selecting the Safety Integrity Level for the Control-Command and Signaling Functions

Method for Selecting the Safety Integrity Level for the Control-Command and Signaling Functions

Resilience-based approach to safety barrier performance assessment in process facilities

Analysis of the Impact of Road Safety Barriers on Reducing the Risk of Dangerous Road Accidents and Their Consequences

Contact Info

Product

Resources

About