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Bayesian Modelling of PWR Vessels Flaw Distributions

Gilles Celeux 1 Matthieu Persoz Joseph Ngatchou Wandji François Perrot
1 IS2 - Statistical Inference for Industry and Health
Inria Grenoble - Rhône-Alpes, LBBE - Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
Abstract : We present a full Bayesian method for estimating the density and size distribution of subclad-flaws in French Pressurized Water Reactor (PWR) vessels. This model takes into account in service inspection (ISI) data, a flaw size-dependent probability of detection function (different function types are possible) with a threshold of detection, and a flaw sizing error distribution (different distribution types are possible). It is identified through a Markov Chain Monte Carlo (MCMC) algorithm. The article includes discussion for choosing the prior distribution parameters and an illustrative application is presented highlighting its ability to provide good parameter estimates even when a small number of flaws is observed.
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https://hal.inria.fr/inria-00073132
Contributor : Rapport de Recherche Inria <>
Submitted on : Wednesday, May 24, 2006 - 11:57:08 AM
Last modification on : Monday, February 10, 2020 - 4:36:45 PM
Long-term archiving on: : Sunday, April 4, 2010 - 9:41:35 PM

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  • HAL Id : inria-00073132, version 1

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Gilles Celeux, Matthieu Persoz, Joseph Ngatchou Wandji, François Perrot. Bayesian Modelling of PWR Vessels Flaw Distributions. RR-3551, INRIA. 1998. ⟨inria-00073132⟩

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