Special Issue on Wide-Ranging and Exotic Applications of Fusion Technology, Part 3

Electrochemical techniques as innovative tools for fabricating divertor and blanket components in fusion technology

The topic of Nuclear Safety Culture touches several different aspects with contributions from the main organizations involved in nuclear projects and belonging to vendors, utility and regulators. Two nuclear safety directives issued by the European Commission emphasize the fundamental principle of national responsibility for nuclear safety and are implemented in each member country’s legislation. An example of fission implementation is highlighted, referring to the Czech Republic legislation; an example of application in fusion technology is the implementation of the Nuclear Safety Culture in the ITER project, located in Cadarache, in the south of France. The aim of the paper is to highlight the importance of this field, pointing out the cross reference between fission and fusion technology as applied in two countries, with concrete experiences and future prospects for nuclear technologies.

"Particle Accelerators — Applications in Technology and Research." Fusion Technology, 19(2), p. 395 Additional informationNotes on contributorsWilliam B. HerrmannsfeldtWilliam B. Herrmannsfeldt (PhD, physics, University of Illinois, 1958) has worked in accelerator physics at the Stanford Linear Accelerator Center since 1962. He is active in heavy ion fusion accelerator research and was chairman of the steering committee for the heavy ion fusion systems assessment program. His special interests include high intensity beam transport issues and the numerical simulation of accelerator components.

Micron-scale analysis of SiC/SiC f composites using the new Lisbon nuclear microprobe

A thermodynamic evaluation of the Ta–V system

Counter-current isotope swamping in a membrane reactor: The PERMCAT process and its applications in fusion technology

We present a thermodynamic study of the Ta–V system based on the Calphad–Thermocalc approach. This work is part of a broader project concerning the thermodynamic description of Ta-containing low activation steels, which were developed in the past decade for applications in fusion technology. In the binary system Ta–V, the Gibbs energy functions of the liquid, the bcc solid solution and the Laves phases were determined. Conflicting information exists in the literature concerning the possible polymorphism of the Laves phase at high temperature; a preliminary assessment of the phase diagram was made without taking into account this phenomenon. Then, the C14–C15 transition was introduced for the Laves phase. The calculated phase equilibria were compared with experimental data.

Os aços ferrítico-martensíticos de atividade reduzida, que emitem baixos níveis de radioatividade após a vida em serviço, são fortes candidatos para aplicação nas tecnologias de fusão nuclear como materiais estruturais. Propriedades importantes, tais como boa resistência mecânica em altas temperaturas, boa conformabilidade, elevada tenacidade e boa resistência à oxidação, estão presentes nesses aços. Formam uma martensita macia (em torno de 20 Rockwell C) após resfriamento ao ar, quando aquecidos acima da temperatura A1. Usualmente são utilizados na condição revenida para aumentar a tenacidade. Esses aços possuem uma microestrutura muito refinada, que pode variar de totalmente martensítica a totalmente ferrítica. Para aprimorar a resistência sob fluência, essa estrutura pode ser endurecida por uma fina dispersão de partículas (compostas à base de ítria e carbonetos do tipo M23C6). As principais características desses aços serão apresentadas e discutidas nesse trabalho.

Formation of Be-W mixed layers in thermonuclear fusion reactors can potentially alter the retention of hydrogen isotopes and affect the retention and release properties of these isotopes. This paper reports on the retention and release characteristics of D from reference Be, W layers as well as three Be-W mixed layers with well-defined atomic concentrations (2:1, 1:1, 1:2). The layers resulted from the sputtering of Be and W materials in Ar:D (1:1) mixture at 2 Pa using DC magnetron sputtering. The mixed layers’ deposition parameters were varied to adjust accordingly the deposition rate for each material in order to obtain the desired concentrations. Scanning electron microscope images showed that morphology is independent of composition for samples deposited on silicon substrates. In contrast, layers deposited on tungsten revealed a textured surface and morphological changes with W concentration variation. X-ray diffraction patterns of mixed layers evidenced the presence of a polycrystalline tungsten phase. Additionally, the degree of crystallinity is highly influenced by the plasma parameters and enhanced amorphization is evidenced by a decrease of crystalline size by a factor of 10 for mixed layers compared to the W reference layer. The release behavior of D from the layers is affected by the trapping contribution of both Be and W. Compared with implanted layers, presented in literature studies, the co-deposited layers show a high D occupancy of low energy trapping states, the majority of the D retained in the samples being released at temperatures below 623 K. High energy trapping becomes more pronounced for layers with a high Be concentration. The oxygen contamination observed for Be layers points to a mitigation of D retention in low energy trapping states and shifts the desorption chart towards a higher temperature due to enhanced retention in BeO associated traps. The D retention presents a linear decrease of W concentration in the sample.

Corrosion behavior of EUROFER steel in flowing eutectic Pb–17Li alloy

Study of solid-state reactions of SiC/SiC f composites using microbeams

Nowadays, network security problems are emerging one after another. In the face of these security problems, various security products have appeared. At the same time, various security products deployed in the network generate a large number of security events (log files) every day, and how to extract valuable information has become an urgent problem to be solved. The purpose of this article is to study the application of data mining and fusion technology in the security management of sensitive data in the data center. This article first summarizes the basic theories of data mining and fusion, and then extends the core technology of data mining and data fusion, and side-by-side combined with the current status of the security management of sensitive data in the data center, we use data mining and fusion technology to research and analyze the application of the sensitive data security management in the data center. This paper systematically explains the architecture and algorithm implementation of security management based on data mining and fusion technology, and the application of data mining and fusion technology in the security management of sensitive data in the data center is investigated and researched through the comparative method, field research and other research methods. The experimental research shows that the sensitive data security is compared with the traditional data center. Management, the data security management system using data mining and fusion technology has more excellent performance.

Application of multisensor digital fusion technology in public art design in complex environments is deliberated to make public art design develop better. First, the more advanced sensor fusion technology is introduced into public art design, and the basic principle and system composition of multisensor fusion technology are analysed. The application of multisensor fusion technology in the field of public art is deeply analysed from multiple angles. Second, the visibility algorithm in public art design based on a fuzzy neural network (FNN) is studied, and the corresponding model is proposed. Finally, the proposed model is tested. The test results show that the root mean squared error of the model is 0.0261, the network has a good fitting effect on the output value, the similarity between the model output value and the real value is high, the fitting effect is good, the model is accurate and effective, and the identification accuracy is achieved. Moreover, the corresponding example model is proposed. The visibility development level of public art design in a region in the next 14 years is predicted. The algorithm proposed provides some ideas for the application of multisensor digital fusion technology in public art design.

Authors

RETRACTED: The application of multi-sensor target tracking and fusion technology to the comprehensive early warning information extraction of landslide multi-point monitoring data