Proceedings of the

The 33rd European Safety and Reliability Conference (ESREL 2023)
3 – 8 September 2023, Southampton, UK

A New Maintenance Efficiency Model and Inference Method for Interval Censored Failure Data

Théo Cousino1,2,a, Florent Brissaud1,b, Laurent Doyen2,c, Olivier Gaudoin2,d and Leïla Marle3

1Research & Innovation Center for Energy, GRTgaz, France.

2Univ. Grenoble Alpes, CNRS, Grenoble INP, LJK, France.

3Research & Innovation Center for Energy, GRTgaz, France.

ABSTRACT

GRTgaz owns and operates the longest high-pressure natural gas transmission network in France. Its industrial assets include more than 32,500 kms of pipeline and 26 compressor stations. The R&D center (RICE) of GRTgaz is developing tools to model these assets for optimizing their management, particularly in terms of maintenance policies. These tools are based on reliability distributions that consider equipment aging and maintenance models. Intrinsic ageing is modeled using probability distributions (Weibull with parameters α and β) for the operating time of an unmaintained system. Effect of maintenance is between minimal and perfect, this is known as imperfect maintenance.


Download PDF