A review on clogging of recirculating steam generators in Pressurized-Water Reactors

Yang, Guangze; Pointeau, V.; Tevissen, E.; Chagnes, Alexandre

doi:10.1016/j.pnucene.2017.01.010

Cited by 40 publications

(28 citation statements)

References 51 publications

(70 reference statements)

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“…This phenomenon can have important consequences on the safety of the PWR. Therefore, the understanding of the origin of this mechanism [1,2], especially that * e-mail: laurence.bergougnoux@univ-amu.fr related to thermal, chemical, hydrodynamic, and physical issues, requires particular attention. Investigations inside the PWRs are limited because of the difficulty to access to specific location of this phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Particle-laden flow around an obstacle in a square pipe: experiments and modeling

Oucheggou

Pointeau

Ricciardi

et al. 2020

Mechanics & Industry

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Particle trapping and deposition around an obstacle occur in many natural and industrial situations and in particular in the nuclear industry. In the steam generator of a nuclear power plant, the progressive obstruction of the flow due to particle deposition reduces the efficiency and can induce tube cracking leading to breaking and damage. The steam generator then loses its role as a safety barrier of the nuclear power plant. From a fundamental standpoint, dilute and concentrated particulate flows have received a growing attention in the last decade. In this study, we investigate the transport of solid particles around obstacles in a confined flow. Experiments were performed in a simplified configuration by considering a laminar flow in a vertical tube. An obstacle was inserted at the middle height of the tube and neutrally-buoyant particles were injected at different locations along the tube. We have investigated first the trajectories of individual particles using particle tracking (PT). Then, the particle trajectories were modeled by using the Boussinesq-Basset-Oseen equation with a flow velocity field either measured using particle image velocimetry (PIV) or calculated by the Code_Saturne software in order to account for the three-dimensional (3D) character of the obstacle wake. This paper presents a comparison between the experimental observations and the predictions of the modeling for an obstacle consisting of a rectangular step at a Reynolds number of ≈100 and evidences the importance of accounting for the 3D complex nature of the flow.

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Section: Introductionmentioning

confidence: 99%

Particle-laden flow around an obstacle in a square pipe: experiments and modeling

Oucheggou

Pointeau

Ricciardi

et al. 2020

Mechanics & Industry

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“…The need of delivering safe and economic nuclear power and extending the life of existing plants maintaining the required safety margins has led to great emphasis on the development of predictive maintenance for nuclear power plants (NPPs). This is being particularly important in France where more than 85% of electricity is currently produced from nuclear reactors, the reliability and safety of NPPs have become important issues to ensure a stable electrical supply to the whole country [1]. Among the most critical components in a NPP, steam generators (SGs), which play a key role in transferring heat from the primary side to pressurized steam on the secondary side of the plant, often suffer various degradation mechanisms, such as flow accelerated corrosion [2]- [4], stress corrosion cracking [5]- [8], and tube support plate (TSP) clogging or blockage [9]- [13].…”

Section: Introductionmentioning

confidence: 99%

“…In the last decades, a great number of studies have been investigated to address the above problems. In [1], several simulations regarding the corrosion product deposits were carried out based on the physicochemical phenomena of TSP clogging. The results indicated that TSP clogging is a complicated process, highly influenced by a specific geometry and a large number of thermohydraulic and chemical parameters.…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Approach for Predicting the Remaining Useful Life of Steam Generators

Fauriat

Zio

Liu

2018

2018 3rd International Conference on System Reliability and Safety (ICSRS)

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The reliability of steam generators in nuclear power plants has always been a challenging issue. Various diagnostic models have been proposed in the literature. However, no work has been reported on the development of a robust prediction model for forecasting the future health state of steam generators. In this paper, we propose an ARIMA-based prognostic approach for tracking the degradation evolution in a steam generator and further predicting its Remaining Useful Life (RUL) before breakdown. A case study concerning real degradation datasets from different steam generators is extensively investigated to validate the performance of the proposed model.

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“…Cracks are among the most common degradations in equipment of several major industries, including manufacturing [1,2], construction [3,4], aerospace [5][6][7], automotive [8,9], energy [10,11], etc. A study conducted by the American Society of Civil Engineers (ASCE) [4] has revealed that more than 80% of the collapses of American bridges in steel were caused by fatigue and fracture in structural elements.…”

Section: Introductionmentioning

confidence: 99%

Dynamic-weighted ensemble for fatigue crack degradation state prediction

Liu

Zio

2018

Engineering Fracture Mechanics

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This paper proposes a prognostic framework for online prediction of fatigue crack growth in industrial equipment. The key contribution is the combination of a recursive Bayesian technique and a dynamic-weighted ensemble methodology to integrate multiple stochastic degradation models. To show the application of the proposed framework, a case study is considered, concerning fatigue crack growth under time-varying operation conditions. The results indicate that the proposed prognostic framework performs well in comparison to single crack growth models in terms of prediction accuracy under evolving operating conditions.

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A review on clogging of recirculating steam generators in Pressurized-Water Reactors

Cited by 40 publications

References 51 publications

Particle-laden flow around an obstacle in a square pipe: experiments and modeling

Particle-laden flow around an obstacle in a square pipe: experiments and modeling

A Data-Driven Approach for Predicting the Remaining Useful Life of Steam Generators

Dynamic-weighted ensemble for fatigue crack degradation state prediction

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