[en] The D-T neutron penetration probability spectra are measured for iron ball shell systems of the series of samples used in the experiments, and the penetration curves are presented. As the detector is near to samples, the measured results being approximately corrected are compared with those in the literature, and it is shown that the former is compatible with the latter in the range of the experimental error

[en] Exact certainty prospect type of uranium deposit, not only can assure the quality of deposit prospects, but also increase economic benefits. Based on the standard of geological prospect of uranium deposit, the author introduces a method of Fuzzy Synthetical Comment for dividing prospect type of uranium deposit. The practical applications demonstrate that the regression accuracy, discriminated by Zadeh operator, of 15 known deposits is 100%

[en] The ground state X³Σ^- and excited state ¹Σ⁺ for UO and their reasonable dissociative limits are successfully derived, based on group theory and atomic and molecular reactive states (AMRS). Using the MP2 (The HF calculation followed by a second-order Moller-Plesset correlation) method of Gaussion 94w and the RECP potential (the relativistic effective core potential) for U and basis 6-311 G for O, the full potential energy curves for the ground state X³Σ^- and excited state ¹Σ⁺ of UO have been calculated, respectively, of which the equilibrium nuclear distance and dissociation energy are 0.1833 nm and 6.9241 eV for the X³Σ^- state, and 0.1825 nm and 8.2651 eV for the ¹Σ⁺ state. From their Murrell-Sorbie function, the complete spectroscopic data and thermodynamic data are also derived for the first-time. The standard enthalpies of formation of UO is 6.331 kJ/mol, and the standard Gibbs free energy of formation is -30.63 kJ/mol

[en] A method called 'Two Arm's Photo out and Electricity Send-back' is introduced. UV-365 UV/VIS/NIR spectrophotometer has been reequipped by this way with 5 meters long optical fiber. Another method called 'One Arm's Photo out and Photo Send-back' is also introduced. λ₁₉ UV/VIS/NIR spectrophotometer has been reequipped by this way with 10 meters long optical fiber. Optical fiber spectrophotometer can work as its main set. So it is particularly applicable to radio activity work

[en] An atmospheric dispersion test on the site of a coastal nuclear power plant located in the east part of China from April, 1995 to April, 1996 is described. The main content is as follows: observation hourly of wind and temperature on the 4 heights of tower of 100 m for 1 year; observation and analysis of surface wind field, sea and land breeze and internal boundary layer; measuring of turbulence and diffusion parameters; wind tunnel simulation experiment and so on. Based on above field test, a new model is developed for estimating the annual mean atmospheric dispersion factor for a coastal site of nuclear power plant in which not only the difference between on-shore and off-shore but also the comprehensive effect of following factors are considered: mixed layer and internal boundary layers, mixing release and variation of diffusion parameters due to the distance from coast and so on. A set of deterministic and probabilistic model for estimating the accident washout factor is developed and established. The effect of internal boundary layer on dose and the contribution to dose from the washout deposition pathway are discussed

[en] The BMD-1 Model Standard Pulse Current Generator is a pulse current calibration instrument. It is used to calibrate current probe, amplifier of current probe and other current measurement instruments. The standard pulse current generator uses a perfect current switch to transfer the standard direct current into the standard pulse current. It provides a variable output current ranges from 1 mA to 1 A, current accuracy is +-(0.25% + 2μA). The standard pulse generator provides three work modes of output current: DC, signal pulse and variable frequencies from 10 Hz to 1 MHz, and provides a variable pulse current widths from 0.5 to 50 μs

[en] The cross section measurements in neutron energy range from 6 to 12 MeV for the reactions with low threshold are very important to obtain a whole excitation function and to make datum evaluation. In present work, the cross sections for 14 reactions were measured in the energy range of 6∼12 MeV and the corrections for the influence of the low energy neutrons are considered very carefully

[en] The experimental data of photonuclear data for ^{180,182,183,184,184,186}W were evaluated, and theoretical calculations were used to supplement in the energy regions where measured photonuclear data were scarce. The recommended photonuclear data for ^{180,182,183,184,186}W were obtained based on evaluated and calculated theoretically data and compared with existing measured data

[en] The present calculational results of the temperature dependence of standard Gibbs free energy change ΔG⁰ for the reactions of CO and H₂ with U, UO₂, UO₃ and U₃O₈, respectively, instructively show that the uranium polyoxides surface will tend to a compact and stable coated with nearly UO₂ crystal so-called 'the bluntly thin skin' preventing further corrosion. It is presumably like the protecting aluminum surface with its oxidized layer. This conceptional model explored for the first-time has been confirmed by the latest works

[en] The PSII-EX device and PSII-IM device for research and development of plasma source ion implantation (PSII) technology are described briefly. The functions, main technical specifications and properties of the devices are also discussed. After ion implantation by PSII, the improvements of the surface-mechanical properties (such as microhardness, wear-resistance, friction factor, biological compatibility, etc) for some materials, microanalysis and numerical simulation of modified layers of materials, the technical developments for the practical workpiece treatments and the preliminary experiments for plasma source ion implantation-enhanced deposition are introduced too. As last, the future work about PSII have been proposed