What question did this study set out to answer?

This study aims to improve the prediction of fluidelastic instability (FEI) in nuclear steam generators by resolving void-fraction intermittency.

June 11, 2026Annals of Nuclear EnergyOpen Access

Void fraction intermittency and its role in two-phase fluidelastic instability in nuclear steam generators

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Authors

HSHossein Farani SaniUniversity of Guelph AEAmro ElhelalyUniversity of Guelph MHMarwan HassanUniversity of Guelph

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Implication

Randomized trial investigates fluidelastic instability driven by void-fraction intermittency in steam generators, suggesting improved prediction methods.

Key Points

This study aims to improve the prediction of fluidelastic instability (FEI) in nuclear steam generators by resolving void-fraction intermittency.
Developed a time-domain, control-volume-based formulation for two-phase FEI.
Represented void fraction as a stochastic, time-resolved field using probability distributions.
Validated the model against experimental data for FEI thresholds and time-domain response characteristics.
Accurate prediction of FEI thresholds across various mass-damping parameters and void fractions.
Successfully reproduced the growth–decay vibration behavior observed in experiments despite limitations of homogeneous models.
Established a mechanistic link between void-fraction intermittency and the onset of instability.

Cite This Study

Sani et al. (2026) studied this question.

synapsesocial.com/papers/6a2a503380c8f91e7f39cc11 https://doi.org/10.1016/j.anucene.2026.112536

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Implication

Randomized trial investigates fluidelastic instability driven by void-fraction intermittency in steam generators, suggesting improved prediction methods.

Void fraction intermittency and its role in two-phase fluidelastic instability in nuclear steam generators

Discussion

Member takes

Implication

Key Points

Cite This Study

Void fraction intermittency and its role in two-phase fluidelastic instability in nuclear steam generators

Discussion

Member takes

Implication

Key Points

Cite This Study

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