[en] Assuming that the surface density of the eddy current has the same amplitude and opposite phase as that of the armature coils, the loss of the eddy current in the conductive shield of the passive compulsator is analyzed using Maxwell equations. The analytical solution for the loss of the eddy current is deduced. This equation is used to evaluate the temperature rise of the shield for a 25 MW generator

[en] Taking into account the flux compression effects generated by the eddy current of the continuous conductive shield in the passively compensated pulsed generator (or passive compulsator), the magnetic field of the armature coils in the air gap of the generator is analyzed by straightforward method, and the analytical solution to the inductance of air-gap armature coil is deduced. A 25 MW generator is designed using this equation. The measurement on the generator verified the accuracy of the analysis equation

[en] The design and computation of a undulator transformed from optical klystron are presented. The brilliance of HLS (NSRL) can be enhanced two orders by the undulator. Lots of experiments which can not be done at the present brilliance will be made possible

[en] [Background] Fuel coolant interaction (FCI) is one of the possible serious problems in severe accidents of nuclear power plants. [Purpose] This study aims to further understand FCI phenomenon and key factors affecting the process of thermal fine fragmentation. [Methods] Visualized experiments were performed using Pb-Sn alloy. Images of the reaction process were acquired through a high-speed video system, the area of pixels occupied by the molten materials was calculated to obtain the cross-sectional area of interaction zone. Melt debris was collected to investigate, the effects of initial melt temperature, melt mass and coolant temperature from three aspects: the morphology of experimental products, the state of interaction process and the gas distribution around molten materials. [Results and Conclusions] The comparative analysis results show that with the increase of melt temperature, thermal fine fragmentation is enhanced first and then reduced. With fixed water volume, improving the quality of the molten materials may lead to insufficient thermal fragmentation. High sub-cooling temperature is beneficial to thermal fine fragmentation of molten materials in FCI process. (authors)

[en] The lithium-sulfur (Li-S) battery stands as a strong contender for the next-generation energy storage system, characterized by abundant sulfur resources, environmental sustainability, and high specific capacity. However, its energy density remains constrained by factors such as low sulfur loading and fraction in the cathode, excessive electrolyte, and an excess of anode. These mild conditions significantly limit the energy density of Li-S batteries, making them less competitive. To achieve higher energy density, harsh operation conditions are necessary, but these remain challenging to implement, even in a lab-scale production. In this comprehensive review, the emphasis will be on recent advancements in Li-S batteries, specifically in the realm of designing high sulfur loading, high sulfur fraction, lean electrolyte, and low limited negative electrode Li-S batteries. A visualizable model that illustrates the relationship between cell energy density and various cell parameters, underscoring the importance of exploring Li-S batteries under extreme operating conditions for further development is provided. Furthermore, it will discussed the possibilities of achieving even higher energy density in Li-S batteries and the challenges that need to be addressed to make them practical for real-world applications. (© 2024 The Authors. Advanced Functional Materials published by Wiley‐VCH GmbH)

[en] The primary structure and the work situation of the ITER transfer cask were introduced. Based on the mode analysis of the transfer cask model, seismic spectrum response analysis was conducted by the finite element method. The results showed that the transfer cask was safe under seismic state. The results will provide some reference data for further optimization of structure design and future experiment of the transfer cask. (authors)

[en] Under the influence of nuclear radiation, the reliability of steam generators (SGs) is an important factor in the efficiency and safety of nuclear power plant (NPP) reactors. Motion planning that remotely manipulates an SG mobile tube-inspection robot to inspect SG heat transfer tubes is the mainstream trend of NPP robot development. To achieve motion planning, conditional traversal is usually used for base position optimization, and then the A* algorithm is used for path planning. However, the proposed approach requires considerable processing time and has a single expansion during path planning and plan paths with many turns, which decreases the working speed of the robot. Therefore, to reduce the calculation time and improve the efficiency of motion planning, modifications such as the matrix method, improved parent node, turning cost, and improved expanded node were proposed in this study. We also present a comprehensive evaluation index to evaluate the performance of the improved algorithm. We validated the efficiency of the proposed method by planning on a tube sheet with square-type tube arrays and experimenting with Model SG

[en] The experimental results of ATC (Adiabatic Toroidal Compressor) are re-analysed with magnetic-compression theory for clarifying the inductance of compressed plasma. Its time-varying nature during compression is revealed, as there has been uncertainty since 1977 (Daughney et al 1977 Nucl. Fusion 17 2). During compression in the major radius, the plasma inductance decreases quasi-linearly with the major radius, and its magnetic energy increases quasi-linearly with the major radius. (paper)

[en] Electrochemiluminescene immunoassay (ECLIA) and enzyme-linked immunosorbent (ELISA) were used to detect the different concentrations of serum HBsAb, in order to compare the results of ECLIA and ELISA. The result showed that intra-assay coefficient of variation of ECLIA was about 0.95% for high value, 1.13% for mean values and 2.63% for low value, while that of ELISA was about 5.76%, 12.8% and 15.9%, respectively. The interassay coefficient of ECLIA was about 4.03% for high values, 4.93% for mean values and 7.34% for low values, while that of ELISA was about 10.1%, 19.6% and 25.2%, respectively. The analytical sensitivity of ECLIA was about 4.0IU/L, while that of ELISA is about 19.0IU/L. Only in 3 samples, the results measured by ECLIA and ELISA were different (ECLIA: positive; ELISA: negative) among 165 samples. It is concluded that the met hod of ECLIA is more efficient than ELISA for detection of HBsAb in serum. (authors)

[en] Alignment system of ITER transfer cask consists of pallet and alignment pins. Pallet is equipped with all the components to allow the docking of the cask in front of VV port, drive envelope in different direction and produce the necessary pushing and reaction force. Alignment pins act as leading and reference. Alignment system can assure enclosure correctly accurately alignment with port. The detailed structure designs of function components of alignment system are shown in the paper. The necessary adjustment ranges and accuracies are also provided. (authors)