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Nuclear reactors (Nuclear engineering)

Solving coupled problems of lumped parameter models in a platform for severe accidents in nuclear reactors

Solving coupled problems of lumped parameter models in a platform for severe accidents in nuclear reactors

... in nuclear reactors : these coarse-grained models allow for fast calculations for statistical analysis used for risk assessment and so- lutions of large problems when considering the whole severe accident ...

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Nuclear reactors' construction costs: The role of lead-time, standardization and technological progress

Nuclear reactors' construction costs: The role of lead-time, standardization and technological progress

... of nuclear reactor construction costs in France and the United ...of nuclear power has often been a challenge, owing to the lack of reliable data sources and heterogeneity between countries, as well as the ...

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Development of a dynamic stochastic neutronic code for the analysis of conventional and hybrid nuclear reactors

Development of a dynamic stochastic neutronic code for the analysis of conventional and hybrid nuclear reactors

... civil nuclear power in the ...of nuclear power systems, ...worldwide. Nuclear reactors of Generation III+ are believed to be within the current state-of-the- art, hence fundamental research on ...

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Understanding of radiation effects and damage in nuclear reactors materials using JANNuS ion beams

Understanding of radiation effects and damage in nuclear reactors materials using JANNuS ion beams

... Understanding of radiation effects and damage in nuclear reactors materials using JANNuS ion beams.. Gentils.[r] ...

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What drives innovation in nuclear reactors technologies? An empirical study based on patent counts.

What drives innovation in nuclear reactors technologies? An empirical study based on patent counts.

... Following the aforementioned literature, we measure innovation effort in nuclear reactors through priority patent applications in twelve OECD countries with commercial NPPs between 1974 [r] ...

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Sensor placement in nuclear reactors based on the generalized empirical interpolation method

Sensor placement in nuclear reactors based on the generalized empirical interpolation method

... Universit´ e Paris-Dauphine, PSL Research University, CNRS, UMR 7534, CEREMADE, 75016 Paris, France. Abstract In this paper, we apply the so-called generalized empirical interpolation method (GEIM) to address the problem ...

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Simplified thermohydraulic criteria for a comparison of the accidental behaviour of GEN IV nuclear reactors and of PWRs

Simplified thermohydraulic criteria for a comparison of the accidental behaviour of GEN IV nuclear reactors and of PWRs

... 𝑟 = 𝛽 + 𝐾 ln ( ) (9) Where T melt is the fuel melting temperature (K) and T nom is the fuel average nominal temperature (K). The analysis of the parameters and criteria (margin to prompt-criticality and neutron ...

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Evolution for the collective radiation dose for the nuclear reactors from the 2nd through to the 4th generation

Evolution for the collective radiation dose for the nuclear reactors from the 2nd through to the 4th generation

... grouping reactors with different power levels ...the reactors taken into account, is a steady decrease in the annual collective ...BWR reactors can be noted. The PHWR-type (CANDU) reactors are ...

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Breaking the picosecond barrier in the physics and chemistry of water radiolysis: Applications of Monte-Carlo modeling to high–temperature nuclear reactors and radiobiology

Breaking the picosecond barrier in the physics and chemistry of water radiolysis: Applications of Monte-Carlo modeling to high–temperature nuclear reactors and radiobiology

... existing reactors, the radiolytic formation of oxidizing species, both radical and stable species such as • OH, O 2•- (or HO 2• depending on the pH), H 2 O 2 , and O 2 (the latter two beings of greatest concern), ...

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Modelling of the contamination transfer in nuclear reactors: The OSCAR code - Applications to SFR and ITER

Modelling of the contamination transfer in nuclear reactors: The OSCAR code - Applications to SFR and ITER

... 1 INTRODUCTION Predicting the radioactive contamination of nuclear reactor circuits is a significant challenge for plant designers and operators. The major stakes are to decrease personnel exposure to radiations, ...

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The design of a functionally graded composite for service in high temperature lead and lead-bismuth cooled nuclear reactors

The design of a functionally graded composite for service in high temperature lead and lead-bismuth cooled nuclear reactors

... The sample exposed to oxidizing LBE exhibited features typical of this alloy in oxidizing LBE, with a chromium peak at the outer surface of the metal followed by[r] ...

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Experimental study, first-principles calculation and thermodynamic modelling of the Cr–Fe–Nb–Sn–Zr quinary system for application as cladding materials in nuclear reactors.

Experimental study, first-principles calculation and thermodynamic modelling of the Cr–Fe–Nb–Sn–Zr quinary system for application as cladding materials in nuclear reactors.

... 1. Introduction The development of zirconium metallurgy is closely related to the nuclear industry. Indeed, zirconium is the key metal for fuel cladding materials and structural components in Pressurized Water ...

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Gas-cooled nuclear reactors

Gas-cooled nuclear reactors

... neutron reactors to a few main aspects, such as the development of an innovative fuel and associated processing and refabrication methods, and the design of the reactor itself (taking into account its very ...

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Temperature Resistant Fiber Bragg Gratings for On-Line and Structural Health Monitoring of the Next-Generation of Nuclear Reactors

Temperature Resistant Fiber Bragg Gratings for On-Line and Structural Health Monitoring of the Next-Generation of Nuclear Reactors

... fiber. This array of micro voids gives rise to a spectral resonance corresponding to a Bragg peak. These femtosecond FBGs require no intrinsic photosensitivity property of the optical fiber. Thus it becomes possible to ...

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Are older nuclear reactors less safe? Evidence from incident data in the French fleet

Are older nuclear reactors less safe? Evidence from incident data in the French fleet

... a nuclear power reactor, and correspond to a set of compulsory declaration criteria defined by the French Nuclear Safety Authority ...in nuclear stations, and to foster the exchange of best practices ...

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Corrosion behaviour of Mg alloys cladding from nuclear reactors fuel in alkaline solutions

Corrosion behaviour of Mg alloys cladding from nuclear reactors fuel in alkaline solutions

... The reprocessing of spent fuel from the French UNGG (Graphite Gas Natural Urani- um) nuclear power plants generates cladding wastes such are Mg-Mn alloys. A stor- age strategy is to encapsulate these wastes into ...

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Evolution of the collective radiation dose of nuclear reactors from the 2nd through to the 3rd generation and 4th generation sodium-cooled fast reactors

Evolution of the collective radiation dose of nuclear reactors from the 2nd through to the 3rd generation and 4th generation sodium-cooled fast reactors

... a nuclear reactor, the external individual doses received by the personnel are measured and recorded, in conformity with the regulations in ...of reactors, mainly based on publications from the NEA and the ...

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Comparative Analysis of Operation and Safety of Subcritical Nuclear Systems and Innovative Critical Reactors

Comparative Analysis of Operation and Safety of Subcritical Nuclear Systems and Innovative Critical Reactors

... advanced nuclear systems, in particular, molten salt reactors, devoted to both energy production and waste ...of nuclear reactors, and in some configurations it helps to reach the “absolute” ...

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A comparison of radioactive waste from first generation fusion reactors and fast fission reactors with actinide recycling

A comparison of radioactive waste from first generation fusion reactors and fast fission reactors with actinide recycling

... Fast fission and fusion energy are represented in this study by corre- sponding nuclear reactors and the radioactive waste produced by them is compared directly.. T[r] ...

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Prediction of nuclear materials behavior for reactors life-span extension towards a multi-scale approach dedicated to microstructure and mechanical properties of irradiated materials

Prediction of nuclear materials behavior for reactors life-span extension towards a multi-scale approach dedicated to microstructure and mechanical properties of irradiated materials

... PW reactors, next steps: life-span extension, safety increase… In France, as in many European countries, there is no operation time limit for nuclear reactors but there is an obligation ...

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