Recursos de colección

Archivo Digital UPM (115.892 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Energía Nuclear

Mostrando recursos 1 - 20 de 57

  1. Nanostructured tungsten as a first wall material for the future nuclear fusion reactors

    Gordillo Garcia, Nuria; Gonzalez Arrabal, Raquel; Rivera de Mena, Antonio; Fernández, I.; Briones Fernández-Pola, Fernando; Rio, David del; Gómez, C.; Pastor, Jose Ygnacio; Tejado Garrido, Elena Maria; Panizo-Laiz, M.; Perlado Martín, José Manuel
    The lack of materials able to withstand the severe radiation conditions (high thermal loads and atomistic damage) expected in fusion reactors is the actual bottle neck for fusion to become a reality. The main requisite for plasma facing materials (PFM) is to have excellent structural stability since severe cracking or mass loss would hamper their protection role which turns out to be unacceptable. Additional practical requirements for plasma facing materials are among others: (i) high thermal shock resistance, (ii) high thermal conductivity (iii) high melting point (iv) low physical and chemical sputtering, and (v) low tritium retention.

  2. Nanostructured tungsten as a first wall material for the future nuclear fusion reactors

    Gordillo Garcia, Nuria; Gonzalez Arrabal, Raquel; Rivera de Mena, Antonio; Fernández, I.; Briones Fernández-Pola, Fernando; Rio, David del; Gómez, C.; Pastor, Jose Ygnacio; Tejado Garrido, Elena Maria; Panizo Laíz, Miguel; Perlado Martín, José Manuel
    The lack of materials able to withstand the severe radiation conditions (high thermal loads and atomistic damage) expected in fusion reactors is the actual bottle neck for fusion to become a reality. The main requisite for plasma facing materials (PFM) is to have excellent structural stability since severe cracking or mass loss would hamper their protection role which turns out to be unacceptable. Additional practical requirements for plasma facing materials are among others: (i) high thermal shock resistance, (ii) high thermal conductivity (iii) high melting point (iv) low physical and chemical sputtering, and (v) low tritium retention.

  3. Nanocrystals in the manufacture of target for inertial confinement fusion

    Guerrero, Carlo; Perlado Martín, José Manuel; Cuesta Lopez, Santiago
    Systems inertial confinement fusion (ICF) need of a manufacturing process targets very accurate and efficient (Fig. A). Due to the frequency needed for energy production techniques are necessary to achieve high repetition rates, however it is also necessary to increase or maintain the quality and efficiency of these targets. In order to observe more resolution possible problems in the target manufacture (B), we propose the following theoretical methodology, by means of which analyze different phenomena present in the conditions which are fabrication and handled deuterium tritium target spheres (DT ice). Recent experiments show that addition of instabilities caused by the...

  4. Conceptual design of liquid lithium laboratory in the TECHNOFUSION project

    González del Moral, Octavio; García, A.; Casal, N.; Abánades Velasco, Alberto; Ibarra, A., A.; Perlado Martín, José Manuel
    The Technofusion project involves the construction of a relevant set of scientific technical facilities in Madrid, providing new tools to fusion energy community.

  5. Quantum molecular dynamics and ab initio studies of the crystal structure of hydrogen and deuterium

    Guerrero, Carlo; Perlado Martín, José Manuel; Cuesta Lopez, Santiago
    Hydrogen isotopes play a critical role both in inertial and magnetic confinemen Nuclear Fusion. Since the preferent fuel needed for this technology is a mixture of deuterium and tritium. The study of these isotopes particularly at very low temperatures carries a technological interest in other applications. The present line promotes a deep study on the structural configuration that hydrogen and deuterium adopt at cryogenic temperatures and at high pressures. Typical conditions occurring in present Inertial Fusion target designs. Our approach is aims to determine the crystal structure characteristics, phase transitions and other parameters strongly correlated to variations of temperature and pressure.

  6. Tritium clouds environmental impact in air into the Western Mediterranean Basin evaluation

    Castro, Paloma; Velarde Mayol, Marta; Ardao, Jose; Perlado Martín, José Manuel; Sedano, L.
    The paper considers short-term releases of tritium (mainly but not only tritium hydride (HT)) to the atmosphere from a potential ITER-like fusion reactor located in the Mediterranean Basin and explores if the short range legal exposure limits are exceeded (both locally and downwind). For this, a coupled Lagrangian ECMWF/FLEXPART model has been used to follow real time releases of tritium. This tool was analyzed for nominal tritium operational conditions under selected incidental conditions to determine resultant local and Western Mediterranean effects, together with hourly observations of wind, to provide a short-range approximation of tritium cloud behavior. Since our results cannot...

  7. Neutron performance analysis for ESS target proposal

    Magán, Miguel; Terrón, Santiago; Thomsen, Knud; Sordo Balbín, Fernando; Perlado Martín, José Manuel; Bermejo, F. J.
    In the course of discussing different target types for their suitability in the European Spallation Source (ESS) one main focus was on neutronics' performance. Diverse concepts have been assessed baselining some preliminary engineering and geometrical details and including some optimization. With the restrictions and resulting uncertainty imposed by the lack of detailed designs optimizations at the time of compiling this paper, the conclusion drawn is basically that there is a little difference in the neutronic yield of the investigated targets. Other criteria like safety, environmental compatibility, reliability and cost will thus dominate the choice of an ESS target.

  8. The use of the ESS Bilbao installations for laser fusion studies

    Rodríguez Páramo, Ángel; Sordo, Fernando; Rivera de Mena, Antonio; Perlado Martín, José Manuel
    In this work the use of ESS-Bilbao fast neutron lines for irradiation of materials for nuclear fusion is studied. For the comparison of ESS-Bilbao with an inertial fusion facility a simplified model of HiPER chamber has been used. Several positions for irradiation at ESS-Bilbao have been also compared. The material chosen for the damage analysis is silica due to its importance on IFC optics. In this work a detailed comparison between the two facilities for silica irradiation is given. The comparison covers the neutron fluxes, doses, defect production and PKA spectra. This study is also intended as a methodological approach...

  9. Plasma facing materials for fusion reactor applications

    Gonzalez Arrabal, Raquel; Gordillo Garcia, Nuria; Rivera de Mena, Antonio; Alvarez Ruiz, Jesus; Garoz, D.; Perlado Martín, José Manuel
    The lack of plasma facing materials (PFM) able to withstand the severe magnetiicffusiion radiation conditions expected in fusion reactors is the actual bottle In both fusions approaches energy is released in the form of kinetic energy of neck for fusion to becomes a reality.

  10. Laser Driven Neutron Sources: Characteristics, Applications and Prospects

    Alvarez Ruiz, Jesus; Fernández-Tobias, J.; Mima, K.; Nakai, S.; Kar, S.; Kato, Y.; Perlado Martín, José Manuel
    The basics of laser driven neutron sources, properties and possible applications are discussed. We describe the laser driven nuclear processes which trigger neutron generation, namely, nuclear reactions induced by laser driven ion beam (ion n), thermonuclear fusion by implosion and photo-induced nuclear (gamma n) reactions. Based on their main properties, i.e. point source (<100 μm) and short durations (< ns), different applications are described, such as radiography, time-resolved spectroscopy and pump-probe experiments. Prospects on the development of laser technology suggest that, as higher intensities and higher repetition rate lasers become available (for example, using DPSSL technology), laser driven methodologies may...

  11. Crack mechanical failure in ceramic materials under ion irradiation: case of lithium niobate crystal

    Garoz, D.; Rivera de Mena, Antonio; Olivares, J.; Agullo Lopez, Fernando; Crespillo Almenara, Miguel; Perlado Martín, José Manuel
    Swift heavy ion irradiation (ions with mass heavier than 15 and energy exceeding MeV/amu) transfer their energy mainly to the electronic system with small momentum transfer per collision. Therefore, they produce linear regions (columnar nano-tracks) around the straight ion trajectory, with marked modifications with respect to the virgin material, e.g., phase transition, amorphization, compaction, changes in physical or chemical properties. In the case of crystalline materials the most distinctive feature of swift heavy ion irradiation is the production of amorphous tracks embedded in the crystal. Lithium niobate is a relevant optical material that presents birefringence due to its anysotropic trigonal...

  12. Silica final lens performance in laser fusion facilities: HiPER and LIFE

    Garoz, D.; Rivera de Mena, Antonio; Juarez Mañas, Rafael; Alvarez Ruiz, Jesus; Gonzalez Arrabal, Raquel; Sanz, J.; Perlado Martín, José Manuel
    Silica final lens performance in laser fusion facilities: HiPER and LIFE

  13. Stability of vacancy clusters in FeCr alloys: A study of the Cr concentration dependence

    Sampedro, Jesus; Rio Redondo, Emma del; Caturla Terol, Maria Jose; Caro, Alfredo; Caro, Magdalena; Perlado Martín, José Manuel
    Fe–Cr based alloys are the leading structural material candidates in the design of next generation reactors due to their high resistance to swelling and corrosion. Despite these good properties there are others, such as embrittlement, which require a higher level of understanding in order to improve aspects such as safety or lifetime of the reactors. The addition of Cr improves the behavior of the steels under irradiation, but not in a monotonic way. Therefore, understanding the changes in the Fe–Cr based alloys microstructure induced by irradiation and the role played by the alloying element (Cr) is needed in order to...

  14. Neutronics and activation of the preliminary reacion chamber of HiPER reactor based in a SCLL blanket

    Juarez Mañas, Rafael; Sanz, J.; Perlado Martín, José Manuel
    Neutronics and activation of the preliminary reacion chamber of HiPER reactor based in a SCLL blanket

  15. The technofusion project for fusion technology development: opportunities for the inertial community

    Rivera de Mena, Antonio; Alvarez Ruiz, Jesus; Gonzalez Arrabal, Raquel; Garoz, D.; Perlado Martín, José Manuel
    Technofusion will be the new Spanish singular scientific-technical installation for fusion research. The research activities will be focused on seven areas of materials research considered the most relevant ones for further technological developments of fusion energy. In principle, most of the infrastructure in Technofusion will be useful for both, magnetic (MC) and inertial (IC) confinement fusion communities and most of the research and developments carried out for one of the fusion concepts will be valid and transferable to the other. However, some aspects related to first wall materials strongly differ in MC and IC approaches. This is due to the...

  16. The technofusion project for fusion technology development: opportunities for the inertial community

    Rivera de Mena, Antonio; Alvarez Ruiz, Jesus; Gonzalez Arrabal, Raquel; Garoz, D.; Perlado Martín, José Manuel
    The new Spanish installation for fusion research (Technofusion) has been approved by both the national and regional governments. Funding up to 80-100 M€ will be invested in the construction of seven laboratories to cover many aspects relevant to fusion technology development. This work discusses their utility for inertial fusion research.

  17. Ultraintense Lasers Applied to Laser Fusion Material Testing: Production of Ions, X rays and Neutrons

    Alvarez Ruiz, Jesus; Fernández-Tobias, J.; Mima, K.; Garoz, D.; Rivera de Mena, Antonio; Gonzalez Arrabal, Raquel; Gordillo Garcia, Nuria; Perlado Martín, José Manuel; Tanaka, K.A.; Kikuyama, K.; Kono, T.; Yabuuchi, T.; Habara, H.; Mishima, Y.; Hirooka, Y.; Ashikawathor, I.; Kondo, K.; Nishiuchi, M.; Tanimoto, T.; Alexander, P.
    The ability of ultraintese lasers to create short pulses of energetic particles and high fluences is addressed as a solution to reproduce ion and X-ray ICF bursts for the characterization and validation of plasma facing components. The possibility of using a laser neutron source for material testing will also be discussed.

  18. Initiatives and facilities for E&T in the nuclear science and technology master at UPM

    Ahnert Iglesias, Carolina; Mínguez Torres, Emilio; Perlado Martín, José Manuel; Gallego Díaz, Eduardo F.; Velarde Mayol, Pedro; Cabellos de Francisco, Oscar Luis; García Herranz, Nuria; Cuervo Gómez, Diana; Jiménez Varas, Gonzalo; Cotelo Ferreiro, Manuel; Lorente Fillol, Alfredo; Gonzalez Arrabal, Raquel; Rivera de Mena, Antonio; Rio Redondo, Emma del
    The present Master/Doctorate in Nuclear Science and Technology programme implemented in the Department of Nuclear Engineering of the Universidad Politécnica de Madrid (NED-UPM) has the excellence qualification by the Spanish Ministry of Education. One of the main of this programme is the training for the development of methodologies of simulation, design and advanced analysis, including experimental tools, necessary in research and in professional work in the nuclear field.

  19. Ab initio Methodology for Calculating Elastic Constant and Sound Velocity for Hydrogen and Deuterium in Molecular Solid Phase

    Guerrero, Carlo; Perlado Martín, José Manuel; Cuesta Lopez, Santiago
    Hydrogen isotopes play a critical role both in inertial and magnetic confinement Nuclear Fusion. Since the preferent fuel needed for this technology is a mixture of deuterium and tritium. The study of these isotopes particularly at very low temperatures carries a technological interest in other applications. The present line promotes a deep study on the structural configuration that hydrogen and deuterium adopt at cryogenic temperatures and at high pressures. Typical conditions occurring in present Inertial Fusion target designs. Our approach is aims to determine the crystal structure characteristics, phase transitions and other parameters strongly correlated to variations of temperature and...

  20. Simulación Ab Initio de los Isótopos de Hidrógeno en Altas Presiones

    Guerrero, Carlo; Cuesta Lopez, Santiago; Perlado Martín, José Manuel
    Tenemos una Metodología Multiescala por medio de la cual es posible estudiar las propiedades mecanicas de los isótopos de Hidrógeno. Observamos transiciones de Fase acorde con las reportadas por estudios experimentales. Existen discontinuidades en la variación de la velocidad del sonido que deben ser mejor estudiadas. Proponemos nuevas estructuras cristalinas para el Hidrógeno en Altas Presiones P mayor que 200 Gpa.

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