Parameter Estimation of a Reliability Model of Demand-Caused and Standby-Related Failures of Safety Components Exposed to Degradation by Demand Stress and Ageing That Undergo Imperfect Maintenance

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Título: Parameter Estimation of a Reliability Model of Demand-Caused and Standby-Related Failures of Safety Components Exposed to Degradation by Demand Stress and Ageing That Undergo Imperfect Maintenance
Autor/es: Martorell, Sebastián | Martorell, Pablo | Sánchez, Ana Isabel | Mullor, Rubén | Martón, Isabel
Grupo/s de investigación o GITE: Sistemas Dinámicos y Estadística (SISDINEST)
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Matemáticas
Palabras clave: Failure models | Probability of failure on demand | Safety equipment | Demand-caused | Standby-related failures
Área/s de conocimiento: Estadística e Investigación Operativa
Fecha de publicación: 18-dic-2017
Editor: Hindawi Publishing Corporation
Cita bibliográfica: Mathematical Problems in Engineering. Volume 2017 (2017), Article ID 7042453, 11 pages. doi:10.1155/2017/7042453
Resumen: One can find many reliability, availability, and maintainability (RAM) models proposed in the literature. However, such models become more complex day after day, as there is an attempt to capture equipment performance in a more realistic way, such as, explicitly addressing the effect of component ageing and degradation, surveillance activities, and corrective and preventive maintenance policies. Then, there is a need to fit the best model to real data by estimating the model parameters using an appropriate tool. This problem is not easy to solve in some cases since the number of parameters is large and the available data is scarce. This paper considers two main failure models commonly adopted to represent the probability of failure on demand (PFD) of safety equipment: (1) by demand-caused and (2) standby-related failures. It proposes a maximum likelihood estimation (MLE) approach for parameter estimation of a reliability model of demand-caused and standby-related failures of safety components exposed to degradation by demand stress and ageing that undergo imperfect maintenance. The case study considers real failure, test, and maintenance data for a typical motor-operated valve in a nuclear power plant. The results of the parameters estimation and the adoption of the best model are discussed.
Patrocinador/es: The authors are grateful to the Spanish Ministry of Science and Innovation for the financial support received (Research Project ENE2016-80401-R) and the doctoral scholarship awarded (BES-2014-067602). The study also received financial support from the Spanish Research Agency and the European Regional Development Fund.
URI: http://hdl.handle.net/10045/72344
ISSN: 1024-123X (Print) | 1563-5147 (Online)
DOI: 10.1155/2017/7042453
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2017 S. Martorell et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1155/2017/7042453
Aparece en las colecciones:INV - SISDINEST - Artículos de Revistas
INV - GESTA - Artículos de Revistas

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