Reactor behavior comparisons for two liquid metal-cooled fast reactors during an event of loss of coolant

Pérez-Valseca, A.D.; Quezada–García, S.; Gómez-Torres, A. M.; Vázquez–Rodríguez, A.; Espinosa-Paredes, Gilberto

doi:10.1016/j.csite.2019.100556

Cited by 5 publications

(9 citation statements)

References 13 publications

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“…The purpose of this paper is to show that the temperature at which viscosity attains its minimal value (T vm ) and minimal viscosity (η m ) can be assessed using extensions of well-tested microscopical viscosity models, such as the Eyring-Kaptay (EK) [34,35] or Douglas-Doremus-Ojovan (DDO) models [7,20,26,36], which present some examples of such calculations. Although our results stand in line with previous works, they present practical interest for the following: (i) Experimental and practical applications (see, e.g., [1,2]);…”

Section: Introductionsupporting

confidence: 91%

“…Another crucial aspect of metallic systems operated in fast neutron reactors is the effect of radiation [ 1 , 2 ]. It is experimentally known that radiation affects the viscous flow; moreover, it significantly changes the character of viscosity, lowering the activation energy of the flow in condensed matter from the high value typical of glass to a low value, which is characteristic at high temperatures: E H → E L [ 74 , 75 , 76 ].…”

Section: Discussionmentioning

confidence: 99%

“…The practical interest in the viscous flow and viscosity of materials at high temperatures is due to many technological applications of molten systems at elevated temperatures, among which the development of liquid metal coolant methods for fast neutron breeder reactors is notable [ 1 , 2 ]. The first metal used in the cooling of liquid metal-cooled fast reactors was mercury (Hg), which was later replaced by the more effective sodium (Na), lead (Pb), a mixture of sodium–potassium (Na-K), and an eutectic mixture of lead–bismuth (Pb-Bi).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On Crossover Temperatures of Viscous Flow Related to Structural Rearrangements in Liquids

Ojovan,

Louzguine-Luzgin

2024

Materials

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An additional crossover of viscous flow in liquids occurs at a temperature Tvm above the known non-Arrhenius to Arrhenius crossover temperature (TA). Tvm is the temperature when the minimum possible viscosity value ηmin is attained, and the flow becomes non-activated with a further increase in temperature. Explicit equations are proposed for the assessments of both Tvm and ηmin, which are shown to provide data that are close to those experimentally measured. Numerical estimations reveal that the new crossover temperature is very high and can barely be achieved in practical uses, although at temperatures close to it, the contribution of the non-activated regime of the flow can be accounted for.

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Section: Introductionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On Crossover Temperatures of Viscous Flow Related to Structural Rearrangements in Liquids

Ojovan,

Louzguine-Luzgin

2024

Materials

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“…Some papers attempt to compare the economic characteristics of fast-neutron reactors with other types of generation. They determine the impact of electrical load and of the discount rate on economic performance [17], the influence of flow amount and type of coolant, of neutron density and temperature of shells [18]. Genetic algorithms are used to optimize the parameters of the reactor core [19].…”

Section: Methodsmentioning

confidence: 99%

Using multi-criteria analysis to select an energy source

2020

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Multi-criteria analysis is widely used to solve various technical and economic problems. There are a large number of applications of multi-criteria analysis. Methods for evaluating the total set of criteria have been investigated. However, the selection of criteria for various specific tasks remains the prerogative of specialists in the relevant branches. The goal of this study was to implement a multi-criteria analysis for assessing the potential of renewable energy sources' competitiveness. Renewable energy sources also include a closed nuclear fuel cycle based on fast-neutron reactors. The advantage of such cycle is the reproduction of nuclear fuel in the same or even greater quantity than it was used. At the same time, uranium isotopes are involved in the cycle, which are waste in conventional nuclear generation. The disadvantage of a nuclear fuel cycle is an output of hazardous waste and a complex technology for its processing. This task is a strategic one, and economic reason is not sufficient in this case. A structure of criteria for strategic decision making was compiled, and eight groups of main criteria were created. An expert analysis of the criteria was carried out and their relative significance was determined. Results. The significance of economic, environmental, technological and safety criteria is revealed. The formulae for criteria normalizing to apply the integration were proposed. Preliminary multi-criteria analysis has shown that a closed nuclear fuel cycle can compete with renewable energy sources such as wind and solar power plants.

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“…A comparative study of the behavior of an LFR and an SFR during a loss of flow event is highly critical for nuclear reactor safety. This has been shown by (Perez-Valseca et al, 2019). High-Temperature Gas Reactors (HTGRs) use helium as a coolant and are characterized by their safety and their feature of eliminating the core meltdown and also minimizing radioactivity release due to accidents.…”

Section: Generation IVmentioning

confidence: 99%

Nuclear Reactors, their Types and Impact on Safety, Environment and Sustainability towards a Green Future

A¹,

Glivin²,

Kalaiselvan³

et al. 2020

Energy Research Journal

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The current world is shifting rapidly towards clean energy sources due to the rapid depletion of fossil fuels. Also, as a solution to the extremely intense growing demand of energy across most of the countries and increasing pollution, nuclear energy is considered as a strategic alternative as it is both clean and does not pollute the environment. When compared with most other conventional sources of energy production currently being used, Nuclear energy emits a minuscule quantity of greenhouse gases and hence is environmentally friendly. In this study, several types of nuclear reactors are compared and with environmental pollution and safety as a deciding parameter. Sustainability of the nuclear reactors, their classification concerning safety and their radiation emissions are also reviewed.

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Reactor behavior comparisons for two liquid metal-cooled fast reactors during an event of loss of coolant

Cited by 5 publications

References 13 publications

On Crossover Temperatures of Viscous Flow Related to Structural Rearrangements in Liquids

On Crossover Temperatures of Viscous Flow Related to Structural Rearrangements in Liquids

Using multi-criteria analysis to select an energy source

Nuclear Reactors, their Types and Impact on Safety, Environment and Sustainability towards a Green Future

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