Concept

Réaction en chaîne (nucléaire)

Publications associées (32)

Radiation detection and energy conversion in nuclear reactor environments by hybrid photovoltaic perovskites

László Forró, Endre Horvath, Andrzej Sienkiewicz, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic

Detection and direct power conversion of high energy and high intensity ionizing radiation could be a key element in next generation nuclear reactor safety systems and space-born devices. For example, the Fukushima catastrophe in 2011 could have been large ...

Elsevier2020

Experimental and numerical study of stochastic branching noise in nuclear reactors

Oskari Ville Pakari

Noise analysis applied to nuclear reactor physics is a powerful tool to investigate a reactor's kinetic parameters, and more generally underlying physical processes determining core behavior. The kinetic parameters are the coefficients of simplified time-d ...

EPFL2020

Data assimilation of post irradiation examination experiments to adjust fission yields

Andreas Pautz, Daniel Jerôme Siefman, Mathieu Hursin

Nuclear data, especially fission yields, create uncertainties in the predicted concentrations of fission products in spent fuel. Herein, we present a new framework that extends data assimilation methods to burnup simulations by using data from post-irradia ...

E D P SCIENCES2020

Analysis of the sorption-enhanced chemical looping biomass gasification process: Performance assessment and optimization through design of experiment approach

François Maréchal, Thanaphorn Detchusananard

In this study, the performance of high-purity hydrogen production through the sorption-enhanced chemical looping gasification (SECLG) process, involving a gasifier, calciner, and air reactor, was investigated. In this process, the biomass feedstock was woo ...

2020

Copper battery for heat to power conversion and energy storage

Sunny Isaïe Maye

An important part of the electricity production relies on heat conversion. Indeed power plants burn fuels like natural gas, coal or use nuclear fission to produce heat that can be transformed into electricity through a thermodynamic cycle and the mechanica ...

EPFL2020

Analysis of deposited layers with deuterium and impurity elements on samples from the divertor of JET with ITER-like wall

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Stefano Coda, Yves Martin, Jonathan Graves, Duccio Testa, Cristian Sommariva, Patrick Blanchard, Bruno Emanuel Ferreira De Sousa Correia, Albano António De Abreu E Presa De Castro E Sousa, Alessandro Pau, Philippe Janson, Thomas Willem Jan de Geus, Lorenzo Anton-Louis Talà, Pamela Solange Valdés Undurraga, Andrea Salmi, Javier García Hernández, Semin Kwak, Jose Felix Vega Stavro, Hugo Augusto Penedones Fernandes, Riccardo Vannucci, Yao Zhou, Henri Weisen, Richard Pitts, Davide Galassi, Sun Hee Kim, Yann Camenen, Jonathan Marc Philippe Faustin, Jan Horacek, Liang Yao, Raffaele Tito D'Agnolo, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, David Pfefferlé, Antonio José Pereira de Figueiredo, Bernhard Sieglin, Dalziel Joseph Wilson, Hamish William Patten, Otto Asunta, Samuel Lanthaler, Robin Humphry-Baker, Fernando Cortes Salazar, João Saraiva Esteves Pacheco de Almeida, Alexis Gérald Page, Daniel Scott Alessi, Luca Carraro, Janir Nuno Ramos Antunes Da Cruz, Tao Xu, Mario Joe Lehmann, Jose Vicente Sanchez Mut, Arnout Lodewijk M Beckers, Matthew Brown, Michael Oliver Reinke, Jonnathan Cesar Hidalgo Acosta, Joao André Gomes de Sá e Sousa, Wei Tang, Stefano Mattei, Lenke Horváth, Magalie Diane Bassan, Luis David Figueiredo Mascarenhas Moreira Pedrosa, Petre Alexandru Arion, Candice Megan T Young, Vlad Trifa, Stéphanie Prior, Lyne Moser, Daniel Molina Romero, Philippe Jean Buchs, Justin Robert Young, Paulo Giovane Paschoali Pereira Puglia, Partha Dutta

Inconel-600 blocks and stainless steel covers for quartz microbalance crystals from remote corners in the JET-ILW divertor were studied with time-of-flight elastic recoil detection analysis and nuclear reaction analysis to obtain information about the area ...

2019

Investigation of deuterium trapping and release in the JET divertor during the third ILW campaign using TDS

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Stefano Coda, Jonathan Graves, Yves Martin, Duccio Testa, Patrick Blanchard, Henri Weisen, Alessandro Pau, David Pfefferlé, Cristian Sommariva, Antonio José Pereira de Figueiredo, Richard Pitts, Jonathan Marc Philippe Faustin, Yann Camenen, Hamish William Patten, Jan Horacek, Samuel Lanthaler, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, Yao Zhou, Davide Galassi, Liang Yao, Dalziel Joseph Wilson, Bernhard Sieglin, Otto Asunta

Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed in 2015-2016 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Nuclear Reaction Analysis (NRA). The ...

Elsevier2019

Role of JETPEAK database in validation of synthetic neutron camera diagnostics and ASCOT- AFSI fast particle and fusion product calculation chain in JET

Henri Weisen

JETPEAK is a comprehensive stationary-state database and a work environment for JET diagnostics data, processed data and simulations suitable for a wide variety of analytical tasks. It enables systematic modelling and efficient interpretation of synthetic ...

IOP PUBLISHING LTD2019

H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D

Olivier Sauter, Alessandro Marinoni, Sung Chul Park

Plasmas with a negative triangularity shape have been created on the DIII-D tokamak that, despite maintaining standard L-mode edge radial profiles, reach volume averaged pressure levels typical of H-mode scenarios. Within the auxiliary power available for ...

2019

Thermal stability of nanometric TiC-carbon composites: effects of carbon allotropes and Zr milling impurities

Paul Bowen

In the ISOL (Isotope Separator OnLine) method a target at high temperatures (up to 2300 degrees C), is bombarded with high energy protons in order to produce isotopes through nuclear reactions which are simultaneously extracted from the target, ionized and ...

2018

Kinetic Parameter Measurements in the CROCUS Reactor Using Current Mode Instrumentation

Andreas Pautz, Vincent Pierre Lamirand, Oskari Ville Pakari, Pavel Frajtag

This paper is an overview of developments and results regarding neutron noise measurements in current mode at the CROCUS zero power facility. Neutron noise measurements offer a noninvasive method to determine kinetic reactor parameters such as the prompt d ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2018

Thermo-mechanical analysis of an ITER ECH&CD Upper Launcher mirror

Timothy Goodman, Matteo Vagnoni, René Chavan, Avelino Mas Sanchez

The Mirror one Lower (LM1) is part of the in-vessel quasi-optical beam propagation system for the ITER Electro Cyclotron (EC) Upper Launcher (UL), where eight beams are reflected through four mirrors during its passage to the plasma. The mirrors are groupe ...

2018