Effect of source size and emission time on the p–p momentum correlation function in the two-proton emission processNuclear Science and Techniques - Tập 31 - Trang 1-6 - 2020
Long Zhou, De-Qing Fang
The effect of source size and emission time on the proton–proton (p–p) momentum correlation function ($$C_\mathrm{pp}(q)$$) has been studied systematically. Assuming a spherical Gaussian source with space and time profile according to the function $$S(r,t)\sim \exp (-r^2/2r_{0}^{2}-t/\tau )$$ in the correlation function calculation code (CRAB), the results indicate that one $$C_\mathrm{pp}(q)$$ di...... hiện toàn bộ
Characterization of molten 2LiF–BeF2 salt impregnated into graphite matrix of fuel elements for thorium molten salt reactorNuclear Science and Techniques - Tập 30 - Trang 1-8 - 2019
Hong-Xia Xu, Jun Lin, Ya-Juan Zhong, Zhi-Yong Zhu, Yu Chen, Jian-Dang Liu, Bang-Jiao Ye
The impregnation behavior of molten 2LiF–BeF2 (FLiBe) salt into a graphite matrix of fuel elements for a solid fuel thorium molten salt reactor (TMSR-SF) at pressures varying from 0.4 to 1.0 MPa was studied by mercury intrusion, molten salt impregnation, X-ray diffraction, and scanning electron microscopy techniques. It was found that the entrance pore diameter of the graphite matrix is less than ...... hiện toàn bộ
Effects of total dose irradiation on the threshold voltage of H-gate SOI NMOS devicesNuclear Science and Techniques - Tập 27 - Trang 1-7 - 2016
Qian-Qiong Wang, Hong-Xia Liu, Shu-Peng Chen, Shu-Long Wang, Chen-Xi Fei, Dong-Dong Zhao
This work researched the impact of total dose irradiation on the threshold voltage of N-type metal oxide semiconductor field effect transistors (nMOSFETs) in silicon-on-insulator (SOI) technology. Using the subthreshold separation technology, the factor causing the threshold voltage shift was divided into two parts: trapped oxide charges and interface states, the effects of which are presented und...... hiện toàn bộ
Optimization of a dynamic uncertain causality graph for fault diagnosis in nuclear power plantNuclear Science and Techniques - Tập 28 Số 3 - Trang 1-9 - 2017
Zhao, Yue, Di Maio, Francesco, Zio, Enrico, Zhang, Qin, Dong, Chun-Ling, Zhang, Jin-Ying
Fault diagnostics is important for safe operation of nuclear power plants (NPPs). In recent years, data-driven approaches have been proposed and implemented to tackle the problem, e.g., neural networks, fuzzy and neuro-fuzzy approaches, support vector machine, K-nearest neighbor classifiers and inference methodologies. Among these methods, dynamic uncertain causality graph (DUCG) has been proved e...... hiện toàn bộ