A Geometric Multiscale modelling approach to the analysis of MSR plant dynamics

Zanetti, Matteo; Cammi, Antonio; Fiorina, Carlo; Luzzi, L.

doi:10.1016/j.pnucene.2015.02.014

Cited by 21 publications

(6 citation statements)

References 47 publications

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“…As for experiments at power operations, there is another paper using a 3-D detailed multiphysics model [27]. DYMOS shows similar results.…”

Section: Verification For Msre Experimentsmentioning

confidence: 72%

Proposal of Application of a Simple Analysis Code DYMOS for Accident Analyses of Molten Salt Reactors

Shimazu,

Yoshioka,

Ogasawara

2023

JENRR

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The Molten Salt Reactor (MSR) possesses unique characteristics, including the circulation of liquid fuel salt in-core and ex-core, and the absence of cladding tubes of fuel rods. To perform safety analyses for accidents and transients, the selection of appropriate models is crucial. Proposed models vary from the coupling of a three-dimensional (3-D) nuclear reactor model and a detailed thermal/hydraulic (T/H) model to a simple point reactor model coupled with a lumped parameter model of the T/H system. The authors have been investigating the development of a simple and accurate model that can be utilized during the design stage and licensing evaluation, while also providing transparency, which means that models can be easily understandable by experts and reproduced in licensing evaluation. Given the distinctive features of the MSR, the peak heat flux or fuel cladding peak temperature is not a requirement. Instead, the most decisive parameter for safety evaluations is the fuel salt temperature in the fuel salt boundary. As demonstrated in this paper, the outlet of the MSR core consistently displays the highest temperature.Based on the afore-mentioned prospects for both nuclear and T/H systems, the authors have developed a simple safety and transient analysis code for MSR (DYMOS). The DYMOS code has been verified for MSRE experiments, as described in this paper. However, the previous verification was limited to small experimental MSRs, and there is a lack of verification for large reactor systems. This paper shows that the DYMOS code is applicable to these larger reactors. In other words, the main objective of this article is not to claim the originality of the model of DYMOS code, but to propose applicability of such simple code to large reactor systems.

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“…As for experiments at power operations, there is another paper using a 3-D detailed multiphysics model [27]. DYMOS shows similar results.…”

Section: Verification For Msre Experimentsmentioning

confidence: 72%

Proposal of Application of a Simple Analysis Code DYMOS for Accident Analyses of Molten Salt Reactors

Shimazu,

Yoshioka,

Ogasawara

2023

JENRR

View full text Add to dashboard Cite

show abstract

“…The difference between the Doppler and density reactivity feedback mechanism is very small due to the small temperature difference We have found a possible error in the experiment specification, which lists the reactivities inserted for the 8 MW and 1 MW tests as 24.8 and 13.9 pcm, respectively. However, the reactivities inserted for the two tests may have been switched in the benchmark specification [75] based on the simulation results and literature review [76,77]. The real reactivities inserted for the 8 MW and 1 MW tests should be 13.9 and 24.8 pcm, respectively.…”

Section: Reactivity Insertion Testmentioning

confidence: 99%

Application of NEAMS Codes to Capture MSR Phenomena

Bao¹,

Shahbazi²,

Fang³

et al. 2021

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“…Tools like DYN-1D and DYN-3D were developed as part of the EU-RATOM MOST project, further emphasizing the significance of spatial representation of the MSR core (Křepel et al, 2007). Approximately a decade later, several studies in the frame of the EURATOM EVOL project focused on the need for multi-dimensional and even multi-scale simulations of thermal-spectrum MSRs (Zanetti et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

On the Need for Multi-Dimensional Models for the Safety Analysis of (Fast-Spectrum) Molten Salt Reactors

Habtemariam,

Fiorina,

Lorenzi

et al. 2023

Preprint

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A Geometric Multiscale modelling approach to the analysis of MSR plant dynamics

Cited by 21 publications

References 47 publications

Proposal of Application of a Simple Analysis Code DYMOS for Accident Analyses of Molten Salt Reactors

Proposal of Application of a Simple Analysis Code DYMOS for Accident Analyses of Molten Salt Reactors

Application of NEAMS Codes to Capture MSR Phenomena

On the Need for Multi-Dimensional Models for the Safety Analysis of (Fast-Spectrum) Molten Salt Reactors

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