[en] In Fangjiashan and other domestic M310 nuclear power plants, vibration widely occurs in the bypass control valves of condensate extraction system. Vibration damages the valves diversely, and influences the stabile operation of the plants. This article aims at the problem of the transnormal vibration of the condensate bypass control valve, and searches the primary cause of the vibration by application of the barrage flow theory and calculation of the parameter practically, and then relatively propounds the improvement solutions. (author)

[en] The state of critical equipment in nuclear power plant is very important, which directly affects the performance of the unit. Therefore, maintenance of critical equipment is the core work of the maintenance department. However, the state management of critical equipment in power plant is now still imperfect, and it is lack of effective tracking management and analysis of historical data of equipment maintenance, resulting in high defect rate. Therefore, according to defect of valve critical equipment in Fangjiashan unit, this paper expounds the necessity and management method of establishing the maintenance archives for critical equipment. Moreover, instructive significance is provided for tracking subsequent equipment state, formulating the maintenance strategy and analyzing the equipment failure causes. (authors)

[en] This paper presents a 0.18 μm CMOS 6.25 Gb/s equalizer for high speed backplane communication. The proposed equalizer is a combined one consisting of a one-tap feed-forward equalizer (FFE) and a two-tap half-rate decision feedback equalizer (DFE) in order to cancel both pre-cursor and post-cursor ISI. By employing an active-inductive peaking circuit for the delay line, the bandwidth of the FFE is increased and the area cost is minimized. CML-based circuits such as DFFs, summers and multiplexes all help to improve the speed of DFEs. Measurement results illustrate that the equalizer operates well when equalizing 6.25 Gb/s data is passed over a 30-inch channel with a loss of 22 dB and consumes 55.8 mW with the supply voltage of 1.8 V. The overall chip area including pads is 0.3 × 0.5 mm"2. (semiconductor integrated circuits)

[en] Pipe dead end conditions in primary loop pressure boundary of nuclear power plant easily lead to equipment defects that have a significant impact on the coolant leakage rate control, and it is hard to deal with the defects. By analysis of the first domestic project of pipe dead end check valve and defected pipeline replacement in a nuclear power plant, it proved that the project reliability can be improved through conservative analysis and selection of technical solutions, project risks identification and classification by failure tree analysis, risk control measures determination by fishbone diagram analysis and phased process control. (authors)

[en] Polyacrylate polymer is a promising polymer matrix for gel polymer electrolyte (GPE) in lithium-ion batteries. Herein, in-situ polymerized poly(ethylene glycol phenyl etheracrylate) (PEGPEA) based GPE combined with 1 M LiPF6 in ethylene carbonate/dimethyl carbonate/ethyl methyl carbonate (EC/DMC/EMC, 1:1:1 in volume) solvents was introduced. The maximum recoverable strain of the in-situ polymerized PEGPEA-GPE was up to 99%. The outstanding interfacial compatibility between PEGPEA-GPE and the lithium electrode was also obtained. Surprisingly, lithium dendrite was effectively suppressed in charge-discharge cycling because of polymer-enhanced solid electrolyte interphase (SEI) and excellent contact interface. Furthermore, the PEGPEA-GPE exhibited wide electrochemical stability window up to 4.9 V versus Li⁺/Li, and achieved an ionic conductivity of 3.35 × 10⁻³ S cm⁻¹ at 25 °C. When used as electrolyte, the Li[Ni_0.5Co_0.2Mn_0.3]O₂/PEGPEA-GPE/Li batteries showed high discharge capacity retention rate of 97.5% after 70 charge-discharge cycles and considerable discharge rate capability, i.e., 155 mAh g⁻¹ 0.2C, 142 mAh g⁻¹ 0.5C, 120 mAh g⁻¹ 1C, 60 mAh g⁻¹ 2C. These results demonstrate that this highly elastic in-situ polymerized PEGPEA-GPE is a potential electrolyte system for high-performance polymer electrolyte lithium-ion batteries and has excellent application prospects in wearable and flexible batteries.