[en] Ordered Fe₁₄Ni₈₆ alloy nanowire arrays implanted in anodic alumite template (AAT) have been fabricated by electrodepositing the corresponding material into the nanochannels. The wires are 43 nm in diameter and 50 μm in length. Their aspect ratio (ratio of length to diameter) is more than 1000, which results in distinctive magnetic anisotropy. The easy magnetization axis of this system is perpendicular to the membrane. Enhanced coercivity (about 769 Oe) and remanent magnetization up to 70% of the saturation magnetization have been observed. We also studied angular dependent coercivities of the Fe₁₄Ni₈₆ alloy nanowire arrays and found that they fit well with the chain-of-sphere combined model of uniform rotation and non-symmetric fanning

[en] A study was carried out on the preparation of Al–Cu–Li alloy from their oxides/metal precursors using the method of electro-deoxidation in the eutectic LiCl–KCl melt at 648 K. Cyclic voltammetry was used to characterize the system. The samples were prepared by potentiostatic electrolysis at −1.0 V to −2.0 V (vs. Ag"+/Ag) for 5 h. XRD analysis shows that Li_2O is not electrochemically reduced to Li at −1.0 V (vs. Ag"+/Ag) or more negative potential. During the preparation process of Al–Cu–Li alloy, lithium peroxide is formed as an intermediate compound. Al–Cu–Li alloy is chemically prepared through the reaction between aluminum and lithium peroxide by heating of Al–Cu–Li_2O precursors in KCl–LiCl–LiF melt at 1023 K. Eelectro-deoxidation in LiCl–KCl melt can increase the lithium content in the final alloy product. Al–Mg and Al–Nd alloy were also prepared by using the same method from their mixture of aluminum and corresponding oxide, respectively. Al–Nd alloy can only be obtained at the temperature above 773 K. Al–Li alloy could not be obtained in eutectic CaCl_2–LiCl melt because of formation of calcium aluminates. - Highlights: • Al–Cu–Li alloy was prepared using electrochemical deoxidation of Al–Cu–Li_2O precursor in eutectic KCl–LiCl melt at 648 K. • Al–Nd alloy was successfully produced by the same method at 773 K. • CaCl_2–LiCl melt is not a good choice for preparing Al–Li alloy because of formation of calcium aluminate.

[en] In recent years, with the development of radiological protection conception and the improvement of requirement about non-human species protection, much more attention has been paid gradually to biota radiation impact. Research and development of non-human species protection impact and its assessment at home and abroad are introduced, then RESRAD-BIOTA and ERICA which are comparatively mature codes in the world are compared and analyzed, at last some suggestions about research and assessment work of non-human species radiological impact in the future in China are provided. (authors)

[en] In this paper the application of a digital PID control in the spectrum stabilization is introduced. The energy spectrum peak stabilization technique combines hardware and software technology it sets the target peak values which meet the requirements as system reference peak values,putting the deviation between the measured peak value and the reference peak in the running process of the system and digital PID algorithm together to adjust programmable gain amplifier to stabilize the peak. The experimental results show that the energy spectrum peak stabilization technique has the advantages of stabling peak fast, good stability, strong anti-interference ability and so on. (authors)

[en] Due to the engineering requirement, the domestic plugging meter for the sodium-cooled fast reactor was designed urgently. Therefore, the control system was designed for the domestic plugging meter. By applying integrated PLC (programmable logical controller), PID (proportion-integration-differentiation) control, frequency control and bus communication technology, a mobile integrated control device was designed. Through the device, the integrated control of the process equipment can be realized according to the process flow. And the device can be easily moved to the sodium loop site to complete the automatic plugging temperature measurement. (authors)

[en] This paper introduces a measurement devise of low activity ²²⁰Rn which uses time interval analysis. The device bases on STM32 and consists of a FD-125 scintillation chamber detector, a main amplifier circuit, a signal shaping circuit and a software system. This device uses cascade decay characteristics of ²²⁰Rn and time interval analysis method to analyze the nuclear pulse time series which is collected through FD-125 scintillation chamber detector. Through performing measurement experimental study of single ²²⁰Rn standard source and mixed radiation field, the results show the relative deviations are within 5% and 9% respectively. (authors)

[en] The IAEA SRS-19 model or site specific medium concentration could be used to calculate the nuclide concentration in environment media in terrestrial organisms radiological impact assessment by the ERICA code, so could the XOQDOQ model. The differences of the IAEA SRS-19 model and the XOQDOQ model are compared in this paper. The two models are used to calculate concentration of nuclides in environment media near a Chinese nuclear power plant and to assess terrestrial organisms radiological impact by the ERICA code. It was concluded that the radiation effects on terrestrial organisms near the site were acceptable by using both models in the ERICA code but the result calculated by the XOQDOQ model was larger. (authors)

[en] In order to make the process of CEFR refueling more convenient and reliable, the computer supervision and control system was designed according to the CEFR refueling technology. Meanwhile, the supervision and control function and database function were developed on the basis of KingView and SQL Server2000. The fuel of reactor core was fully loaded by the system, and full-automation of CEFR refueling process was implemented. (authors)

[en] By the example of the design basis value of wind speeds for a nuclear power plant in Guangdong Province, through the uncertainties analysis and calculation verification, several problems deserving attention during the evaluation process of design basis wind speed value are discussed. In accordance with the regulatory requirements of the evaluation of nuclear power plant design basis, suggestion of uncertainty handling during the evaluation of nuclear power plant design basis wind speeds are made, and the principles during this process are discussed. (authors)

[en] We have performed a comprehensive first-principle computational study of the electronic properties of one-dimensional phosphorene nanotubes (PNTs), and the strain effect on the mechanical and electrical properties of PNTs, including the elastic modulus, energy bandstructure, and carrier effective mass. The study has demonstrated that the armchair PNTs have semiconducting properties along the axial direction and the carrier mobility can be significantly improved by compressive strain. The hole mobility increases from 40.7 cm"2/V s to 197.0 cm"2/V s as the compressive strain increases to −5% at room temperature. The investigations of size effect on armchair PNTs indicated that the conductance increases significantly as the increasing diameter. Overall, this study indicated that the PNTs have very attractive electronic properties for future application in nanomaterials and devices