Jose Manuel Perlado's research while affiliated with Universidad Politécnica de Madrid and other places

Publications (14)

Article
Full-text available
In this paper, we report on an enhanced hydrogen permeation effect along grain boundaries in tungsten. Sputtered nanocolumnar tungsten layers (column lateral dimensions 100–150 nm and layer thickness 2 μm) were analysed by hydrogen permeation measurements in the temperature range 520–705 K. The experiments constitute a direct observation of this ef...
Article
A new irradiation loop design has been developed, which provides the ability to carry out radiolytic resistance studies of extraction systems simulating process relevant conditions in an easy and simple way. The step-by-step loop configuration permits an easy modification of settings and has a relative low volume requirement. This irradiation loop...
Article
In this work, we present a study which tackles the stability of molecules involved in EURO-GANEX aqueous phase, the acetohydroxamic acid (AHA) and the sulphonated BTP (SO3-Ph-BTP), taking into account factors such as the known AHA hydrolysis, acidity of the media, and the radiolysis of AHA and SO3-Ph-BTP. To better understand the system, the radiol...
Chapter
We present a summary of the key technologies necessary to implement Inertial Fusion Energy. We describe many of the tools, materials, and approaches to address the specific challenges presented to safely and affordably achieve optimal fusion gain. We update recent advances in complementary technologies like artificial intelligence, machine learning...
Article
Amorphous carbon (aC), in particular diamond-like carbon (DLC), is one of the most studied and promising coating materials, but many of the atomic-scale mechanisms involved in their plastic deformation process are not fully understood. The mechanical response of non-hydrogenated DLC films with different sp concentrations is investigated using nanoi...
Article
More sustainable nuclear fuel cycle options will entail the implementation of efficient separation processes of actinides from lanthanides, which currently continues being a critical milestone. One of the limiting points to ensure a safe and stable long-term operation is the resistance against radiation of the extraction systems under development....
Article
Full-text available
Plasma-facing materials (PFMs) for nuclear fusion, either in inertial confinement fusion (ICF) or in magnetic confinement fusion (MCF) approaches, must withstand extremely hostile irradiation conditions. Mitigation strategies are plausible in some cases, but usually the best, or even the only, solution for feasible plant designs is to rely on PFMs...
Article
Metallic hollow nanoparticles exhibit interesting optical properties that can be controlled by geometrical parameters. Irradiation with femtosecond laser pulses has emerged recently as a valuable tool for reshaping and size modification of plasmonic metal nanoparticles, thereby enabling the synthesis of nanostructures with unique morphologies. In t...
Article
Full-text available
In this work, we investigated experimentally and theoretically the plasmonic Fano resonances (FRs) exhibited by core–shell nanorods composed of a gold core and a silver shell (Au@Ag NRs). The colloidal synthesis of these Au@Ag NRs produces nanostructures with rich plasmonic features, of which two different FRs are particularly interesting. The FR w...
Article
Full-text available
To demonstrate the robustness of extraction systems against radiolytic degradation is nowadays one of the limiting points to ensure a safe and stable operation for advanced nuclear fuel strategies. In this paper, is addressed the stability of one of most promising extractants (TODGA, N , N , N ′, N ′-tetraoctyldiglycolamide) but also the importance...
Article
The ligand acetohydroxamic acid (AHA) suffers hydrolysis at acidic conditions. This reaction has been studied for a long time, due to its implications in different applications, by using indirect colorimetric methods. This work shows how Raman spectroscopy can be very useful as a direct technique for measuring the hydrolysis kinetics of AHA, faster...
Article
Acetohydroxamic acid (AHA) has been widely used in the development of reprocessing processes for spent nuclear fuel (SNF) due to its ability to form hydrophilic complexes preferentially with tetravalent metals and to help the control of their oxidation states. It is also well known that AHA undergoes hydrolytic degradation at the acidic conditions...
Article
The high surface area of graphene oxide (GO) and the different polar and oxygenated groups on its surface ensure its high sorption capacity for different metals from aqueous solutions. Moreover, its elevated stability under some harsh conditions could also allow the application of GO in real nuclear waste management. In this paper, the 241Am(III) a...

Citations

... However, the intense gamma rays arising from many radionuclides generated by the fission process of the fuel material 235 U or 239 Pu and neutron activation in the spent fuel elements during reactor operation can be used for many research purposes and technical applications. Irradiation facilities in spent fuel assemblies have been developed and are being used at research reactors and nuclear power plants worldwide for several years [1,2]. ...
... Using MD simulation methods, the interaction mechanism between the indenter and substrate at the nanoscale can be elucidated (Luu et al., 2021). Further, mechanical properties acquired from MD simulations of nanoindentation are often in excellent agreement with experimental results (Valencia et al., 2021;Zhou et al., 2021). Hence, a lot of useful information about the nanoscale deformation mechanism can be obtained from MD simulations of the indention process, including loading and unloading curves and the evolutionary characteristics of the atomic-scale structure. ...
... A similar trend in D Eu values (a decrease followed by an increase with increasing doses) was also observed by Sańchez-García. 31 It may be caused by the initial degradation of TODGA and a follow-up formation of adducts/ degradation products in the organic phase that were able to extract Eu(III). ...
... Despite its remarkable mechanical properties, the lack of ductility of tungsten under He or H retention is a cause of major concern, because of the embrittlement and detriment it implies for many applications, which reduce its performance as a nuclear radiation facing material [16][17][18]. Fortunately, a nanoporous architecture offers a large surface to volume ratio with several recombination sinks for defect migration [19,20] and vacancy annihilation; therefore, a nanoporous design raises an alternative for the synthesis of radiation-tolerant devices using tungsten as its base material. In fact, W nanofoams have been recently examined as a promising alternative for plasma-facing materials, in the next generation of nuclear fusion plants. ...
... displayed the internal void(s) formation, which was also previously observed in femtosecond laser-induced ultrafast melting of Au NP as well as numerical simulations (17,24,25). Focused plasmonic heating led to local accumulation of the ionic pressure, and the voids were formed to release the pressure. ...
... Plasmonic Fano resonances have been widely experimentally and theoretically studied. Particularly, those arise by core/shell nanorods made of gold core and silver shell Au@Ag nanorod [11], where they found Fano resonance located at elevated energies (≈ 3.7 eV). Nanocavity can be established using nanocubes assembly. ...
... Gamma irradiations are either conducted using dry facilities [15, 17-18, 20, 23-25] (e.g. Gammacell 220), or pool-type facilities [16,19,[26][27] (e.g. Náyade at CIEMAT). ...
... Another technique is the addition of nanofillers [5]. The carbon family has recently become a research focus, and graphene oxide (GO) has been used as an effective nanofiller to remove heavy metal ions from wastewater [6,7]. This compound also has critical applications in nuclear waste management because of its remarkable stability under complex conditions [8,9]. ...
... This can notably deteriorate the W properties, e.g., a reduction of thermal conductivity down to 1% was reported 18,19 . The nanostructuring of W by largely increasing the grain boundary density, or by usage of engineered structures with large surface area (nanocolumns or nanofoams) results in higher radiation resistance [20][21][22][23][24][25][26][27][28][29] . Qin et al. reported that the creation of nano-columnar tungsten surfaces (NC-W) reduced the development of W-fuzz during high-fluence helium plasma exposure 30 , since helium could be quickly trapped and released along the channels between the nano-columns (NC). ...