Experimental investigation of steam condensation in water tank at sub-atmospheric pressure

Mazed, Dahmane; Frano, Rosa Lo; Aquaro, Donato; Serra, Daniele Del; Sekachev, I.; Olcese, M.

doi:10.1016/j.nucengdes.2018.05.025

Cited by 39 publications

(13 citation statements)

References 15 publications

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“…There is an absence of volcanological data with which to compare the modeled condensation dynamics. The most appropriate comparison available is to experimental data in the engineering field of direct contact condensation (DCC) (Aya & Nariai, 1991; Chun et al., 1996; Hong et al., 2012; Mazed et al., 2018; Meng et al., 2019; Xu et al., 2018; Zhao & Hibiki, 2018). Direct contact heat transfer focuses on the condition when two fluids, typically immiscible, exchange heat directly rather than through a wall or boundary (Zhao & Hibiki, 2018).…”

Section: Methodsmentioning

confidence: 99%

Explosive Submarine Eruptions: The Role of Condensable Gas Jets in Underwater Eruptions

Cahalan

Dufek

2021

JGR Solid Earth

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Both subaerial and submarine explosive volcanic eruptions have the capacity to produce high velocity gas jets where fragmented particle-gas mixtures are ejected with significant inertia inherited from conduit processes (e.g. Woods, 1995). In this jet-thrust region, the particle-laden gas rises and loses kinetic energy through drag, gravitational deceleration, and turbulent mixing with the ambient fluid. Subaerial jet-thrust dynamics have been extensively studied through remote observations, experiments, and numerical simulations (

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Section: Methodsmentioning

confidence: 99%

Explosive Submarine Eruptions: The Role of Condensable Gas Jets in Underwater Eruptions

Cahalan

Dufek

2021

JGR Solid Earth

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“…To do so, some researchers performed experiments on industrial scales Chen et al, 2017a). Mazed et al (2018) performed an experimental study on condensation of steam inside a pressure vessel prototyped from a real thermonuclear reactor. The results showed that the condensation regime is governed by the water temperature, downstream pressure and the steam mass flow rate.…”

Section: Full-scale Investigationsmentioning

confidence: 99%

Thermal Energy Processes in Direct Steam Generation Solar Systems: Boiling, Condensation and Energy Storage – A Review

et al. 2019

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“…The experimental facility with its main components is shown in Figure 3. A more detailed description of the facility is given in [1][2]. The steam is injected inside the condensation tank through a removable single or multiple-holed (with 1 to 18 holes) sparger system.…”

Section: Description Of the Experimental Rigmentioning

confidence: 99%

“…The Loss of Coolant Accident (LOCA) scenario is one of the most challenging accident sequence for the ITER safety because it may lead to a pressurization of the Vacuum Vessel (VV) due to the sudden formation of steam and noncondensable gases (Hydrogen and Oxygen) [1][2][3]. In such an event, the steam is discharged at a high or low rate, according to the postulated event conditions [4][5][6], into the Vacuum Vessel Pressure Suppression System (VVPSS).…”

Section: Introductionmentioning

confidence: 99%

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Mitigation of a Loss of Coolant Accident in ITER Vacuum Vessel by Means of Steam Pressure Suppression

Pesetti¹,

Giambartolomei²,

Frano³

et al. 2019

IJES

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A Loss of Coolant Accident (called ICE cat. IV) is postulated to occur in the ITER Vacuum Vessel due to a rupture of a shielding blanket cooling piping. The mitigation of this accident is realized by means of a Pressure Suppression System, constituted by 4 Tanks of 100 m 3 of volume each. The Pressure Suppression Tanks (PSTs) system operates at sub-atmospheric pressure. No experimental results of steam condensation at sub atmospheric pressure conditions have been found in the technical literature. Therefore, both analytical-numerical analyses and experimental tests were carried out at the University of Pisa on a 1:22 scale apparatus, simulating the PST. Scaling studies were performed in order to calculate the effectiveness and functional performance of PST, simulating in the reduced scale apparatus the transient of steam mass flow rate occurring during the ICE IV event. The accidental scenarios have been determined considering the results of previous thermal hydraulic studies performed at ITER. Subsequently, a quite extensive experimental campaign has been carried out on the reduced scale apparatus in order to study the influence of the main thermal hydraulic parameters that characterize the steam condensation efficiency in sub-atmospheric conditions. This paper illustrates the results of analytical and numerical analyses simulating the PST behaviour during the transient of steam mass flow rate due to the Ingress of Coolant Event. The transient has been simulated experimentally applying the elaborated scale laws. The designed tanks of the PST have matched the safety goal to reduce the system pressurization condensing the injected steam at sub-atmospheric pressure.

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Experimental investigation of steam condensation in water tank at sub-atmospheric pressure

Cited by 39 publications

References 15 publications

Explosive Submarine Eruptions: The Role of Condensable Gas Jets in Underwater Eruptions

Explosive Submarine Eruptions: The Role of Condensable Gas Jets in Underwater Eruptions

Thermal Energy Processes in Direct Steam Generation Solar Systems: Boiling, Condensation and Energy Storage – A Review

Mitigation of a Loss of Coolant Accident in ITER Vacuum Vessel by Means of Steam Pressure Suppression

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