[ES] En este trabajo se propone el uso de un detector flat panel junto a una cuña de polimetilmetacrilato (PMMA) para estimar el espectro de rayos X utilizando el método de Monte Carlo y técnicas de reconstrucción. El ...
Barrachina Celda, Teresa María(Universitat Politècnica de València, 2021-01-10)
[ES] La simulación de transitorios forma parte del proceso de licenciamiento de una central nuclear. Esto implica que los códigos, así como los modelos utilizados deben estar verificados y validados. Normalmente, esta ...
Sánchez Hernández, Ana María(Universitat Politècnica de València, 2012-12-19)
El uso de códigos es una herramienta fundamental en Seguridad Nuclear para la simulación de diferentes situaciones en reactores de potencia. En particular, los códigos termohidráulicos de estimación óptima nos permiten ...
Lorduy, M.; Gallardo Bermell, Sergio; Verdú Martín, Gumersindo Jesús(Elsevier, 2021-12-01)
[EN] The utility of the Integral Test Facilities (ITF) for the study of thermohydraulic phenomena that can occur in nuclear power plants has been demonstrated. However, direct extrapolation of data between different scales ...
[EN] This work covers an important point of the benchmark released by the expert group on Uncertainty Analysis in Modeling of Light Water Reactors. This ambitious benchmark aims to determine the uncertainty in light water ...
PL equations are classical approximations to the neutron transport equations, which are obtained expanding the angular neutron flux in terms of spherical harmonics. These approximations are useful to study the behavior of ...
Obtaining primary X-ray spectra is a complex task mainly due to the high fluence of X-rays. In order to avoid the pile up effect in the detector, an indirect method based on the Compton scattering interactions in a low ...
An accurate knowledge of the photon spectra emitted by X-ray tubes in radiodiagnostic is essential to
better estimate the imparted dose to patients and to improve the quality image obtained with these
devices. In this ...
[EN] Quality control of mammography units is necessary
to reduce the dose imparted to women as much as possible. Accurate characterization of the primary X-ray
spectra is very useful for this purpose. Obtaining primary ...
[EN] A thorough knowledge of the primary spectrum is very important to perform a quality control (QC) of X-ray tubes. In previous works, a methodology to assess primary spectrum using a Compton spectrometer and applying ...
González Pintor, Sebastián(Universitat Politècnica de València, 2012-11-16)
La ecuación de la difusión neutrónica describe la población de neutrones de un reactor nuclear. Este trabajo trata con este modelo para reactores nucleares con geometría hexagonal. En primer lugar se estudia la ecuación ...
Fayez Moustafa Moawad, Ragab(Universitat Politècnica de València, 2016-06-07)
[EN] The neutron diffusion equation is an approximation of the neutron transport equation that describes the neutron population in a nuclear reactor core. In particular, we will consider here VVER-type reactors which use ...
Bernal-Garcia, Alvaro; Román Moltó, José Enrique; Miró Herrero, Rafael; Verdú Martín, Gumersindo Jesús(Elsevier Masson, 2016-11)
The neutron flux spatial distribution in Boiling Water Reactors (BWRs) can be calculated by means of the Neutron Diffusion Equation (NDE), which is a space- and time-dependent differential equation. In steady state conditions, ...
We evaluated the genetic damage by ethanolic extract of propolis (EEP) induced to human lymphocytes which were exposed to increasing concentrations (0–2000 μg ml−1). The results indicated that EEP reduced significantly the ...
This paper constitutes a first approach of the
assessment of the ANSYS-CFX code to simulate the
TRIGA research reactor. Due to computational limits
simplifications of the core and of some other geometrical
details ...
Mayo Nogueira, Patricia; Ródenas Escribá, Francisco De Asís; Verdú Martín, Gumersindo Jesús; Villaescusa, J.I; Campayo, Juan Manuel(Elsevier, 2004-02)
[EN] In this work a method has been developed to analyse the digital image quality of a mammographic phantom by means of automatic process techniques. The techniques used for the digital image treatment are standard ...
Ramos, M.; Montoro, A.; Almonacid, M.; Ferrer, S.; Barquinero, J. F.; Tortosa, R.; Miró Herrero, Rafael; Verdú Martín, Gumersindo Jesús; Rodriguez, P.; Barrios, L. L.; Villaescusa, J. I.(IEEE Engineering in Medicine and Biology Society, 2011)
[EN] Interventional radiologists and staff members are frequently exposed to the effects of direct and scattered radiation, which undergo in deterministic effects (radiodermitis, aged skin, cataracts, telangiectasia in ...
[EN] The dominant lambda-modes associated with a nuclear reactor configuration describe the neutron steady-state distribution and its criticality. Furthermore, they are useful to develop modal methods to study reactor ...
[EN] In nuclear engineering, the lambda-modes associated with the neutron diffusion equation are applied to study the criticality of reactors and to develop modal methods for the transient analysis. The differential ...