Communication Dans Un Congrès Année : 2024

Sensitivity analysis and uncertainty quantification in PWR irradiation ageing like problems

Juan Antonio Monleon de la Lluvia
Mariya Brovenchenko
Dimitri Rochman
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Résumé

The lifespan of nuclear power plants is a critical aspect of energy production, with reactor vessel ageing being one of the main challenges. Over time, ageing under neutron irradiation of the Pressurized Water Reactor (PWR) vessels leads to changes in the material's micro-structure. These changes adversely affect the mechanical properties, making the material more brittle and susceptible to fractures, especially under strong temperature gradients. Beyond the vessel, the aging of other elements, such as concrete structures, also poses significant concerns. Accurate calculations of neutron fluence and the associated uncertainties throughout and beyond the reactor vessel are essential to ensure safety. This study aims at addressing this issue by applying a specific methodology to a simplified model, providing a foundational step to quantify the uncertainty in Monte-Carlo simulations related to irradiation ageing in nuclear reactors.
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hal-04846235 , version 1 (18-12-2024)

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  • HAL Id : hal-04846235 , version 1

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Juan Antonio Monleon de la Lluvia, Mariya Brovenchenko, Dimitri Rochman, Eric Dumonteil. Sensitivity analysis and uncertainty quantification in PWR irradiation ageing like problems. RPSD 2024 - Radiation Protection and Shielding Division 2024, ANS, Nov 2024, Orlando, United States. ⟨hal-04846235⟩
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