Most papers are machine-translated to English; some are originally in English.
Showing 27 of 77 papers in Nuclear Science And Technology
Unlike the structural characteristics of conventional single-focus X-ray tubes, the radiation protection and shielding design of distributed multi-focus X-ray tubes requires targeted research. This paper employs Monte Carlo simulation methods to model and investigate the radiation field and shieldin…
Tungsten is a commonly used shielding material in Sr-90 radioisotope thermoelectric generators, but it exhibits poor high-temperature oxidation resistance. To enhance its oxidation resistance under high-temperature operating conditions, this study fabricated a nickel-chromium composite coating on tu…
The environmental compatibility of structural materials in liquid lead-bismuth is a bottleneck restricting the development and construction of lead-cooled fast reactors. 9-12Cr ferritic-martensitic steels and austenitic stainless steels are preferred candidate materials for key equipment in lead-coo…
Background: The nitrate natural circulation loop (NNCL) is an important experimental platform for investigating the natural circulation characteristics of molten salt. Through numerical simulation and parameter sensitivity analysis of the nitrate natural circulation loop (NNCL), this study deepens t…
To calculate the detection efficiency curve and coincidence correction factors for well-type HPGe, the detection efficiency of HPGe was calibrated using commonly employed monoenergetic γ-ray nuclide standard sources, while simultaneously measuring the cascade coincidence correction factors for commo…
While traditional gamma-gamma density (GGD) logging technology is widely utilized, its potential environmental risks have prompted the development of more environmentally friendly neutron-gamma density (NGD) logging technology. However, NGD measurements are influenced by both neutron and gamma radia…
The Shanghai Proton Therapy Device (SAPT) is the first domestic proton therapy demonstration system. The rotating gantry constitutes a critical component of the proton therapy apparatus, achieving an isocentric accuracy of ±0.275 mm that surpasses international mainstream equipment, thereby requirin…
Pre-oxidation is a critical step in the preparation of polyacrylonitrile-based (PAN) carbon fibers, and gamma irradiation represents an effective approach for optimizing the thermal pre-oxidation process. However, the effects and underlying mechanisms of gamma irradiation and thermal treatment seque…
To satisfy the teaching and research demands for reactors in general universities, point reactor neutron kinetics, xenon and samarium poisoning, temperature feedback, and lumped-parameter thermal-hydraulic dynamic models for TRIGA (Training, Research, Isotopes, General Atomic) reactors—primarily uti…
Liquid metal heat pipes are important thermal conductive components for space exploration vehicles, exhibiting excellent heat transfer capabilities and isothermal performance. However, during space exploration missions, sodium heat pipes may operate under conditions below or even far below the desig…
The High Energy Fragment Separator (HFRS), which is currently under construction, is a leading international radioactive beam device. Multiple sets of position-sensitive Twin Time Projection Chamber (TPC)detectors are distributed on HFRS for particle identification and beam monitoring. The twin TPCs…
The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic (RAFM) steel, which is a candidate structural material for fusion reactors. In order to elucidate the susceptibility of different grain boundaries (GBs) to helium-ind…
The Veto detector of the external target facility (ETF) at the Heavy Ion Research Facility in Lanzhou - Cooling Storage Ring (HIRFL-CSR) was calibrated using cosmic rays. The calibration work was primarily divided into two components: position calibration and time calibration. Position calibration y…
The synergistic damage effect of irradiation and corrosion of reactor structural materials has been a prominent research focus. This paper provides a comprehensive review of the synergistic effects on the third- and fourth-generation fission nuclear energy structural materials used in pressurized wa…
Nuclear material license holders should develop a nuclear material accounting management system and achieve closed material balance. According to regulatory requirements, the implementation of nuclear material accountancy is based on physical inventory and material measurements. Generally, spent fue…
A dilation X-ray detector (DIXD) based on time dilation and microchannel plate (MCP) gated technology has been reported. The DIXD passes a driving pulse along the transmission photocathode (PC) to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps. Furthermore, the…
Precise measurements of the cavity forward (Vf) and reflected signals (Vr) are essential for characterizing other key parameters such as the cavity detuning and forward power. In practice, it is challenging to measure Vf and Vr precisely because of crosstalk between the forward and reflected channel…
Doped elements in alloys significantly impact their performance. Conventional methods usually sputter the surface material of the sample, or their performance is limited to the surface of alloys owing to their poor penetration ability. The X-ray K-edge subtraction (KES) method exhibits great potenti…
The radiation environment on the surface of Mars is a potential threat for future manned exploration missions to this planet. In this study, a simple geometrical model was built for simulating the radiation environment on the Mars surface caused by galactic cosmic rays (GCRs); the model was built an…
Controllable D-D neutron sources offer long service life, low cost, and no radioactivity. They show favorable prospects for application in geophysical well logging, as traditional chemical radioactive sources used in well logging pose potential safety hazards to human health and the environment. Thi…
The muon radiography imaging technique for high-atomic-number objects (Z) and large-volume objects via muon transmission imaging and muon multiple scattering imaging remains a popular topic in the field of radiation detection imaging. However, few imaging studies have been reported on low and medium…
Collinear laser spectroscopy is a powerful tool for studying the nuclear spins, electromagnetic moments, and charge radii of exotic nuclei. To study the nuclear properties of unstable nuclei at the Beijing Radioactive Ion-beam Facility (BRIF) and the future High Intensity Heavy-ion Accelerator Facil…
Nuclear data are the cornerstones of reactor physics and shielding calculations. Recently, China released CENDL-3.2 in 2020, and the United States released ENDF/B-VIII.0 in 2018. Therefore, it is necessary to comprehensively evaluate the criticality computing performance of these newly released eval…
The transport cross-section based on inflow transport approximation can significantly improve the accuracy of light water reactor (LWR) analysis, especially for the treatment of the anisotropic scattering effect. The previous inflow transport approximation is based on the moderator cross-section and…
The advantages of once-through molten salt reactors include readily available fuel, low nuclear proliferation risk, and low technical difficulty, making them potentially one of the most easily commercialized fuel cycle modes for molten salt reactors. However, there exist certain issues in parameter …
An accelerator-based Boron Neutron Capture Therapy (AB-BNCT) experimental facility called D-BNCT01 has been recently completed and is currently able to generate a high-intensity neutron beam for BNCT related research. In this study, we perform several experiments involving water phantoms to validate…
The Shanghai High Repetition Rate XFEL and Extreme Light Facility (SHINE) project will use 600 1.3 GHz fundamental power couplers, which are modified based on TTF-III power couplers, for continuous wave operation with input power up to approximately 7 kW. The first batch of 20 sets of 1.3 GHz couple…
