Temperature Evolution and Light Species Diffusion in Armor and Structural Material for Inertial Fusion Reactor Chambers: a Case for HiPER 4a

One of the most advance designs for HiPER fusion reactor is a spherical chamber 10 m in diameter based on dry wall concept. In this system, the first wall will have to withstand short energy pulses of 5 to 20 MJ at a repetition rate of 0.5-10 Hz mostly in form of X-rays and charged particles. To avoid melting of the inner surface, the first wall consists on a thin armor attached to the structural material. Thickness (th) and material of each layer have to be chosen to assure the proper functioning of the facility during its planned lifetime.

Interstitial defects stability in FeCr alloys vs Cr concentration

Finding adequate materials to withstand the demanding conditions in the future fusion and fission reactors is a real challenge in the development of these technologies. Structural materials need to sustain high irradiation doses and temperatures that will change the microstructure over time. A better understanding of the changes produced by the irradiation will allow for a better choice of materials, ensuring a safer and reliable future power plants. High-Cr ferritic/martensitic steels head the list of structural materials due to their high resistance to swelling and corrosion. However, it is well known that these alloys present a problem of embrittlement, which could be caused by the presence of defects created by irradiation as these defects act as obstacles for dislocation motion. Therefore, the mechanical response of these materials will depend on the type of defects created during irradiation. In this work, we address a study of the effect Cr concentration has on single interstitial defect formation energies in FeCr alloys.

Influence of termal fluctuations in radiation damage cascade production and defect dynamics in tungsten

The detailed study of the deterioration suffered by the materials of the components of a nuclear facility, in particular those forming part of the reactor core, is a topic of great interest which importance derives in large technological and economic implications. Since changes in the atomic-structural properties of relevant components pose a risk to the smooth operation with clear consequences for security and life of the plant, controlling these factors is essential in any development of engineering design and implementation. In recent times, tungsten has been proposed as a structural material based on its good resistance to radiation, but still needs to be done an extensive study on the influence of temperature on the behavior of this material under radiation damage. This work aims to contribute in this regard. Molecular Dynamics (MD) simulations were carried out to determine the influence of temperature fluctuations on radiation damage production and evolution in Tungsten. We have particularly focused our study in the dynamics of defect creation, recombination, and diffusion properties. PKA energies were sampled in a range from 5 to 50 KeV. Three different temperature scenarios were analyzed, from very low temperatures (0-200K), up to high temperature conditions (300-500 K). We studied the creation of defects, vacancies and interstitials, recombination rates, diffusion properties, cluster formation, their size and evolution. Simulations were performed using Lammps and the Zhou EAM potential for W

Historia de la guerra de la División Real de Navarra, contra el intruso sistema, llamado Constitucional, y su gobierno revolucionario / por Andres Martin.

Sign.: A-Z4, 2A-2M4, 2N3

Manual de confessores y penitentes, que contiene quasi todas las dudas que en las confessiones suelen ocurrir, de los pecados ... : con cinco comentarios de vsuras, cambios, symonia mental, defension del proximo, de hurto notable, [et] irregularidad /compuesto por el Doctor Martin de Azpilcueta nauarro ... ; con su reportorio copiosissimo

Colofón en 3D8r y en L5v de la segunda secuencia

Manual de confessores y penitentes, que contiene quasi todas las dudas que en las confessiones suelen ocurrir, de los pecados ... : con cinco comentarios de vsuras, cambios, symonia mental, defension del proximo, de hurto notable, [et] irregularidad /compuesto por el Doctor Martin de Azpilcueta nauarro ... ; con su reportorio copiosissimo

Colofón en 3D8r y en L5v de la segunda secuencia

Manual de confessores y penitentes, que co[n]tiene quasi todas las dudas que en las confessiones suelen ocurrir de los pecados ... : con cinco comentarios de vsuras, cambios, symonia mental, defension del proximo, de hurto notable, [et] irregularidad / compuesto por el Doctor Martin de Azpilcueta nauarro ... ; con su repertorio copiosissimo.

Segunda fecha tomada de los colofones en 3D8r y L5v de la segunda secuencia, y de las port. de las partes segunda y tercera

Manual de confessores y penitentes, que co[n]tiene quasi todas las dudas que en las confessiones suelen ocurrir de los pecados ... : con cinco comentarios de vsuras, cambios, symonia mental, defension del proximo, de hurto notable, [et] irregularidad / compuesto por el Doctor Martin de Azpilcueta nauarro ... ; con su repertorio copiosissimo.

Sign.: [calderón]8, A-Z8, 2A-2Z8, 3A-3D8, A-K8, L6, 2a-2d8