Experimental research on the thermal stratification criteria and heat transfer model for the multi-holes steam ejection in IRWST of AP1000 plant

Zhang, Yuhao; Lu, Daogang; Wang, Zhongyi; Fu, Xiaoliang; Cao, Qingjie; Yi, Yang; Wu, Guanghao

doi:10.1016/j.applthermaleng.2016.07.083

Cited by 33 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TCs located at the thermocline showed low frequency and high amplitude temperature oscillations during the erosion phases (Figure 5b). A similar signature can be observed in [19]. A Fast Fourier Transformation (FFT) was applied to the TCs readings after subtracting their time averaged values (0 Hz component).…”

Section: Behavior Of the Thermoclinementioning

confidence: 58%

“…The possibility of thermal stratification development was further confirmed in [19] using a multi-hole sparger injection through a scaled down IRWST sparger of the AP1000. Similar to [18], the Richardson number (ratio between buoyant and inertia forces) was found to determine the transition between stratification and mixing of the pool.…”

Section: Introductionmentioning

confidence: 86%

“…ABB-Atom design of spargers for BWR Mark-II and III plants was considered in the scaling process: upper ring of downward facing holes, known as the Load Reduction Ring (LRR), and radially outwards holes at the sparger head [20]. Other designs, such as the BWR Mark I by General Electric [34] and AP1000 by Westinghouse [19], use T-quenchers, which inject steam through horizontal sections of the sparger pipes with a wide range of injection hole diameters. Once the plant design and transient are selected, the experimental design and conditions can be defined to study relevant phenomena at the macro, meso, and micro scales.…”

Section: Scaling Of the Ppoolex And Panda Experiments With Spargermentioning

confidence: 99%

“…Fernando et al [26] and other researchers [27,28] also demonstrated that the bulk Richardson number can be used to determine the erosion mode and, most importantly, the erosion velocity. Previous pool analysis with the Richardson number were mainly focused on the boundary between mixing and stratification [19,29], whereas the results from [26] allow predicting the transition between these states.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pool stratification and mixing induced by steam injection through spargers: analysis of the PPOOLEX and PANDA experiments

Gallego-Marcos

Kudinov

Villanueva

et al. 2018

Nuclear Engineering and Design

View full text Add to dashboard Cite

Spargers are mutli-hole injection pipes used in Boiling Water Reactors (BWR) and Advanced Pressurized (AP) reactors to condense steam in large water pools. A steam injection induces heat, momentum and mass sources that depend on the steam injection conditions and can result in thermal stratification or mixing of the pool. Thermal stratification reduces the steam condensation capacity of the pool, increases the pool surface temperature and thus the containment pressure. Development of models with predictive capabilities requires the understanding of basic phenomena that govern the behavior of the complex multi-scale system. The goals of this work are (i) to analyze and interpret the experiments on steam injection into a pool through spargers performed in the large-scale facilities of PPOOLEX and PANDA, and (ii) to discuss possible modelling approaches for the observed phenomena. A scaling approach was developed to address the most important physical phenomena and regimes relevant to prototypic plant conditions. The focus of the tests was on the low steam mass flux and oscillatory bubble condensation regimes, which are expected during a long-term steam injection transient, e.g. in the case of a Station Black Out (SBO). Exploratory tests were also done for chugging and stable jet conditions. The results showed a similar behavior in PPOOLEX and PANDA in terms of jet induced by steam condensation, pool stratification, and development of hot layer and erosion of the cold one. A correlation using the Richardson number is proposed to model the erosion rate of the cold layer as a function of the pool dimensions and steam injection conditions.

show abstract

Section: Behavior Of the Thermoclinementioning

confidence: 58%

Section: Introductionmentioning

confidence: 86%

Section: Scaling Of the Ppoolex And Panda Experiments With Spargermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pool stratification and mixing induced by steam injection through spargers: analysis of the PPOOLEX and PANDA experiments

Gallego-Marcos

Kudinov

Villanueva

et al. 2018

Nuclear Engineering and Design

View full text Add to dashboard Cite

show abstract

“…Dimensions and data presented in this section have been all obtained from [51], [52], [102], where additional information about the experimental facility can be found.…”

Section: Experimental Facility Descriptionmentioning

confidence: 99%

Development of an AP1000 3D full containment model using an innovative approach

Estévez-Albuja¹

View full text Add to dashboard Cite

Modelling of a Nordic BWR containment and suppression pool behavior during a LOCA with GOTHIC 8.1

Estévez-Albuja

Gallego-Marcos

Kudinov

et al. 2020

Annals of Nuclear Energy

View full text Add to dashboard Cite

Experimental research on the thermal stratification criteria and heat transfer model for the multi-holes steam ejection in IRWST of AP1000 plant

Cited by 33 publications

References 20 publications

Pool stratification and mixing induced by steam injection through spargers: analysis of the PPOOLEX and PANDA experiments

Pool stratification and mixing induced by steam injection through spargers: analysis of the PPOOLEX and PANDA experiments

Development of an AP1000 3D full containment model using an innovative approach

Modelling of a Nordic BWR containment and suppression pool behavior during a LOCA with GOTHIC 8.1

Contact Info

Product

Resources

About