Modelling and CFD analysis of the DYNASTY loop facility

Nalbandyan, A.; Cammi, Antonio; Lorenzi, Stefano; Klinkby, E. B.; Lauritzen, Bent

doi:10.1051/epjn/2022010

Cited by 2 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the ways how to lower the molten salt loops' demandingness is to use scaled-down experimental devices [11], [12]. One of the scaled-down experimental devices is DYNASTY -eDYNASTY experiment at Politecnico di Milano, Italy [13], [14], [15]. This experiment uses water as a working medium.…”

Section: Introductionmentioning

confidence: 99%

The Design of the Scaled-down Experimental Device for Molten Salts

Cihlář,

Entler,

Zácha

et al. 2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

View full text Add to dashboard Cite

An intermediate heat transfer system (IHTS) with a molten salt working medium is one of the proposed concepts of the future DEMO fusion power plant. Molten salts are currently used for concentrating solar power plants, heat accumulation and energy storage, and in some chemical processes. Moreover, there are proposed as a coolant and fuel carrier in the future Generation IV fission nuclear power plants. Despite its current use in some fields, many questions remain unanswered. To study them, technically, organizationally, and financially demanding experimental devices are required. In order to avoid this demandingness, the possible use of scaled-down experimental devices is studied. Such an experimental device working with thermal oil at lower temperatures with similar behavior to molten salts called SHAKER is being built in the laboratories of the

show abstract

Section: Introductionmentioning

confidence: 99%

The Design of the Scaled-down Experimental Device for Molten Salts

Cihlář,

Entler,

Zácha

et al. 2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

View full text Add to dashboard Cite

show abstract

1D modelling and preliminary analysis of the coupled DYNASTY–eDYNASTY natural circulation loop

et al. 2023

Self Cite

View full text Add to dashboard Cite

In the continuous strive to improve the safety of current-generation and next-generation nuclear power plants, natural circulation can be used to design passive safety systems to remove the decay heat during the shutdown. The Molten Salt Fast Reactor (MSFR) is a peculiar type of Gen-IV nuclear facility, where the fluid fuel is homogeneously mixed with the coolant. This design leads to natural circulation in the presence of an internally distributed heat source during the shutdown. Furthermore, to shield the environment from the highly radioactive fuel, an intermediate loop between the primary and the secondary loops, able to operate in natural circulation, is required. To analyze the natural circulation with a distributed heat source and to study the natural circulation of coupled systems and the influence of the intermediate loop on the behaviour of the primary, Politecnico di Milano designed and built the DYNASTY-eDYNASTY facility. The two facilities are coupled with a double-pipe heat exchanger, which siphons heat from DYNASTY and delivers it to the eDYNASTY loop. This work focuses on modelling the coupled DYNASTY-eDYNASTY natural circulation loops using DYMOLA2023®, an integrated development environment based on the Modelica Object-Oriented a-causal simulation language. The 1D Modelica approach allows for building highly reusable and flexible models easing the design effort on a complex system such as the DYNASTY-eDYNASTY case without the need to rewrite the whole model from scratch. The coupled models were developed starting from the already-validated single DYNASTY model and the double-pipe heat exchanger coupling. The models were tested during the whole development process, studying the influence of the numerical integration algorithm on the simulation behaviour. A preliminary analysis of both the adiabatic and the heat loss models analyzed the effect of the secondary natural circulation loop on the behaviour of the DYNASTY loop. The simulation results showed that the eDYNASTY loop dampens the behaviour of the primary DYNASTY loop. Furthermore, a parametric analysis of the DYNASTY and the eDYNASTY coolers highlighted the influence of the cooling configuration on the facility’s behaviour. Finally, the simulation results identified the most critical aspects of the models in preparation for an experimental comparison.

show abstract

Modelling and CFD analysis of the DYNASTY loop facility

Cited by 2 publications

References 10 publications

The Design of the Scaled-down Experimental Device for Molten Salts

The Design of the Scaled-down Experimental Device for Molten Salts

1D modelling and preliminary analysis of the coupled DYNASTY–eDYNASTY natural circulation loop

Contact Info

Product

Resources

About