[en] The HTR-10, which now is under construction, is the first high-temperature gas-cooled reactor developed in China. The primary loop boundary components of the HTR-10 are peculiarly arranged as the reactor pressure vessel stands side by side with the steam-generator pressure vessel, and a hot-gas duct vessel connects them. This arrangement can diminish the thermal loads on the pressure vessels but can cause some new problems under seismic conditions. The design features of the support system of the HTR-10 primary loop boundary components are introduced. The procedure of seismic analysis of the support system is emphasized. Based on equivalent-static and dynamic calculations, the safety features of the support system under seismic conditions are demonstrated

[en] Shape errors always exist in the manufacture of pressure vessel, and the designer should know the acceptable criteria. The author analyzes the change of the primary stress in the vessel body and vessel head and the influence on the safety property of pressure vessel caused by the whole shape error based on finite element analysis. Some universal results are achieved. As an example of HTR-10 reactor pressure vessel, acceptable criteria of the shape error are discussed by the actual conditions during the design and manufacture

[en] The author introduces a new electromagnet drive for reactor control rod. Its coil which is out of tube motive a armature which is inside of tube, when the coil is moving, the armature will be moved with it, and the armature drive the reactor control rod. The author gives curves and data results of rigidity experiment, carrying capacity experiment, turn off response experiment, temperature experiment and the driving device experiment. The evaluation for the new control rod drive was given

[en] Nuclear codes have detailed regulations on the mechanical analysis of nuclear Class 1 piping. But limited calculation facilities restrict the analysis of Class 1 piping, so that design safety requirements are not satisfied. This paper discusses the mechanical analysis of Class 1 piping using general-purpose finite element software. The general-purpose finite element software MARC is used to analyze a Class 1 piping system in HTR-10 to introduce the procedure for mechanical analysis and safety evaluation. The objective is to satisfy the regulations for the Class 1 piping in nuclear codes. The method introduced in this paper can be used as a practical method for mechanical analysis of a nuclear Class 1 piping

[en] Three types of bolt tensioner are designed and successfully used for the installation and dismantling of the pressure vessels of 10 MW high temperature reactor (HTR-10) instead of using the expensive tools from abroad. The structure characteristics, the parameters and the test results of the bolt tensioner are presented, and the calculation method of the main bolt pre-tightening force is given

[en] SA516-70 plate has the characteristics of moderate intensity, high tenacity and well welding property. The authors have manufactured the 10 MW High Temperature Gas-cooled Reactor pressure vessel with SA516-70 plate. The mechanical behaviour of SA516-70 is fit for the design requirement and it has been validated by the hydrostatic test

[en] As the world-wide accepted advanced nuclear reactor, the most prominent characteristic of High-temperature Gas-cooled Modular Reactor is its inherent safety. The core arrangement of the 10 MW High-temperature Gas-cooled Reactor, which is now under construction, is described in detail. The features of its structure design are analyzed, and based on these features, the advantages of inherent safety and manufacture are also discussed

[en] Magnetite-graphene (Fe₃O₄-GE) was prepared via a simple effective chemical precipitation method, followed by the chemical reduction with hydrazine. Fe₃O₄-GE was characterized by Raman spectroscopy, transmission electron microscope, X-ray powder diffraction and electrochemical methods. A hydrogen peroxide (H₂O₂) biosensor was structured by immobilizing hemoglobin (Hb) into Fe₃O₄-GE for the first time. UV-vis and Fourier transform infrared spectra were employed to characterize Hb retained original structure in the resulting Hb-Fe₃O₄-GE membrane. Electrochemical investigation of the biosensor showed a pair of well-defined, quasi-reversible redox peaks with E_pa = -0.285 V and E_pc = -0.363 V (vs. SCE) in phosphate buffer solution (0.1 mol/L, pH 7.0) at the scan rate of 100 mV/s. The Hb-Fe₃O₄-GE showed a better synergistic electrochemical effect for the reduced process of H₂O₂. The biosensor displayed a fast response time (<3 s) and broad linear response to H₂O₂ in the range from 1.50 to 585 μmol/L with a relatively low detection limit of 0.5 μmol/L (S/N = 3). Moreover, the biosensor could be applied in practical analysis and exhibit good reproducibility and long-term stability.