Revista Cubana de Física The Revista Cubana de Fisica (RCF, Cuban Journal of Physics) is a biannual open access journal (e-ISSN 2224-7939, p-ISSN 0253-9268) published by the Cuban Physical Society (SCF) and the School of Physics of the University of Havana (FF-UH) solely funded by its publishers (without charges to the authors). Three types of articles are considered for publications: Regular Original Articles, Original Short Articles and Review Articles. Likewise, the RCF includes other several sections as: Moments of the Cuban Physics, For Physics and Non-Physics, News and Obituaries. Concerning the language, manuscripts in Spanish as weel as in English are welcome in Microsoft Office Word (.doc or .docx) and LaTex (.tex) formats. The peer-review is blind and performed by external reviewers outside the editorial team of the RCF, the SCF or the FF-UH.
- Advances in the Conceptual Design of a Small Modular Reactor of the Integrated Pressure Water Typepor C. García el julio 17, 2024 a las 10:00 pm
The development and deployment of small nuclear reactors (SMRs) as part of the new generations of nuclear reactors has gained significant importance in recent years. The advantages of SMRs is due not only to their ability to generate low-emission energy, but essentially to their modularity characteristics and their small dimensions. The TRI-structural-ISOtropic (TRISO) fuel, with proven advantages in graphite-gas type nuclear reactors, has been researched for use in PWRs. To obtain high proliferation resistance, extended fuel cycles for SMRs have been proposed. To obtain conceptual designs of SMR cores with a large cycle length, using low fuel enrichment, without shuffle, and with a relatively small core size is a challenge. In this work, a study was carried out to consider improvements in the behavior of the fuel cycles of a conceptual design of a SMR type iPWR, using TRISO fuel. These improvements are related to increasing reactor core power while maintaining extended fuel cycles and, on the other hand, considering different core zones with different fuel compositions, varying the packaging fraction, the last with the aim of to enlarge the fuel cycles and maintaining a flattened radial power distribution.
- Image Quality Study in Breast Tomography with Synchrotron Radiationpor M. Pérez-Díaz el julio 14, 2024 a las 10:00 pm
The SYRMA-3D project is dedicated to carrying out basic research to lay the groundwork for implementing breast computed tomography (bCT) using synchrotron radiation, in routine clinical settings in the near future (bCT-SR). This article focuses on the optimization of studies (image quality vs. patient dose). Three ex vivo samples were scanned at the SYRMEP station of the ELETTRA Synchrotron (Trieste, Italy) with the free space propagation technique with monochromatic beam and phase contrast, for 64 different acquisition conditions. So, for each of the energies used (25, 28, 32 and 35 keV); acquisitions were made at four distances from the sample to the detector, (0.2 m, 1.65 m, 3.7 m and 9 m), and for each of these conditions, four conditions of average glandular dose (MGD) imparted were used 20, 5, 2 and 1 mGy. Images were acquired with a photon-counting PIXIRAD detector. The Contrast-Noise ratio and Image Contrast, as indicators of image quality, were evaluated for the 5 central slices of the 64 tomographic acquisitions, in the variant that includes phase recovery (PhR). The results indicated that several protocols provided relevant three-dimensional
- Development of an Automated System for Successive Ionic Layer Adsorption and Reaction (SILAR) Technique at Room Temperaturepor E. L. Más-Molina el julio 14, 2024 a las 10:00 pm
In this work, we present the design, fabrication, and automation of a customized and affordable system capable of performing the thin film deposition techniques of Dip-Coating and SILAR at room temperature. To automate the system, parts from disused equipment were reused, new pieces were fabricated through additive manufacturing, and open-source software was also utilized. The device was controlled using an Arduino UNO R3. Additionally, graphical interface was developed in Python with the PyQt library to adjust the motion settings and transmit parameters to the Arduino via serial communication. We validated the system by fabricating layers of Cu2O and CuO, subsequently comparing their structural and morphological properties with findings previously reported in the literature.
- Thermo-Hydraulic Analysis of A Small Modular Reactor of Type IPWRpor D. Perdigón el julio 14, 2024 a las 10:00 pm
Small Modular Reactors (SMRs) are an innovative option for power generation. This type of reactor offers numerous benefits and uses the implementation of fully ceramic microencapsulated fuel (FCM) in an integral pressurized water reactor (iPWR) with SMR characteristics has been studied previously. FCM has excellent thermal and irradiation resistance properties and is composed of a SiC matrix with dispersed TRISO fuel particles. To perform the thermo-hydraulic analysis of the core of an SMR using FCM as fuel, a computational model was built using CFD codes. The model describes a typical fuel assembly of the reactor and the main thermo-hydraulic parameters are calculated for the increased power values of 65, 80, and 100 MWt. To improve the thermo-hydraulic behavior of the core, it was considered to vary the values of mass flow, core inlet temperature, and system pressure.
- Use of Convolution Method at Linear Intervals in X-ray Diffraction Profilespor D. M. Rodríguez-Herrera el julio 14, 2024 a las 10:00 pm
A mathematical formalism for calculating the intrinsic profile of a diffraction maximum through a convolution process using a set of linear functions by intervals is presented. This convolution process is implemented in the formalism for the direct solution of a diffraction pattern of a layered crystalline structure affected by planar defects. It allows the correlation length (ΔC) to be calculated, which describes the degree of disorder in this type of crystalline structure. The obtained result is validated through the Warren–Averbach method for microstructural analysis