• English
    • español
  • español 
    • English
    • español
  • Login
Ver ítem 
  •   DSpace Principal
  • 2.- Investigación
  • Artículos
  • Ver ítem
  •   DSpace Principal
  • 2.- Investigación
  • Artículos
  • Ver ítem
JavaScript is disabled for your browser. Some features of this site may not work without it.

Minimal cutsets-based reduction approach for the use of binary decision diagrams on probabilistic safety assessment fault tree models

Thumbnail
Ver/
IIT-09-069A.pdf (221.4Kb)
Fecha
2009-12-01
Autor
Ibañez Llano, Cristina
Rauzy, Antoine
Meléndez Asensio, Enrique
Nieto Fuentes, Francisco
Estado
info:eu-repo/semantics/publishedVersion
Metadatos
Mostrar el registro completo del ítem
Mostrar METS del ítem
Ver registro en CKH

Refworks Export

Resumen
 
 
Binary decision diagrams (BDDs) are a well-known alternative to the minimal cutsets (MCS) approach to assess Boolean reliability models. While the application of fault tree analysis can be considered to be consolidated, its application to the event trees involved in the probabilistic safety assessment (PSA) studies of the nuclear industry require extended efforts. For many real PSA models the full conversion procedure remains out of reach in terms of computational resources owing to their size, non-coherency, redundancy, and complexity. A potential solution to improve the quality of assessment methods is to design hybrid algorithms that combine the information derived from the calculation of MCS with the BDD methodology. As a first step to develop this new approach, this paper explores various procedures and strategies based on this principle. First, a method is presented to reduce the fault tree model by considering only the domain of the most relevant MCS of the system prior to the BDD conversion and the impact on the final probability of the model is analysed. Second, several ordering heuristics derived from the MCS and the structural information of the model are proposed and compared, both in terms of their general performance and their sensitivity to the initial rewriting of the model. This preliminary study is applied on a set of fault tree models belonging to a real PSA study. The results obtained lead to some promising conclusions: it is shown that the topological information proves to be essential for the ordering and conversion procedures; it is also revealed that the rewriting strategies should be considered when designing variable ordering methods; and, finally, it is demonstrated that the reduction procedure provides a faster computation process without affecting the final probability. The long-term objective, which has motivated this work, is to apply this reduction procedure to quantify sequences of linked fault trees, both static and dynamic, a task for which further work is required.
 
URI
https:doi.org10.12431748006XJRR259
Minimal cutsets-based reduction approach for the use of binary decision diagrams on probabilistic safety assessment fault tree models
Tipo de Actividad
Artículos en revistas
ISSN
1748-006X
Materias/ categorías / ODS
Instituto de Investigación Tecnológica (IIT)
Palabras Clave

Probabilistic safety assessment, fault tree analysis, binary cecision diagrams, minimal cutsets, variable ordering heuristics
Colecciones
  • Artículos

Repositorio de la Universidad Pontificia Comillas copyright © 2015  Desarrollado con DSpace Software
Contacto | Sugerencias
 

 

Búsqueda semántica (CKH Explorer)


Listar

Todo DSpaceComunidades & ColeccionesPor fecha de publicaciónAutoresTítulosMateriasPor DirectorPor tipoEsta colecciónPor fecha de publicaciónAutoresTítulosMateriasPor DirectorPor tipo

Mi cuenta

AccederRegistro

Repositorio de la Universidad Pontificia Comillas copyright © 2015  Desarrollado con DSpace Software
Contacto | Sugerencias