核电厂低功率时蒸汽发生器水位的模糊控制

本文针对压水堆核电厂在低功率运行时蒸汽发生器水位控制容易造成停堆的实际情况，提出了蒸汽流量的估算方法，设计了以模糊控制为核心的水位控制器。模糊控制器的输入信号是水位偏差，以及通过对核电厂中所测得的具有一定精度的物理量进行综合计算得出的流量偏差，它们的隶属度函数分别由流量偏差和水位偏差决定。分析比较表明。该控制器在核电厂低功率运行时能够有效地控制蒸汽发生器水位，可避免水位的大幅度脉动与紧急停堆，对提高可用性、减少非计划停堆有积极的意义与工程实用价值。     

Genetic Correlational Analyses of Ethanol Reward and Aversion Phenotypes in Short-Term Selected Mouse Lines Bred for Ethanol Drinking or Ethanol-Induced Conditioned Taste Aversion.

Short-term selective breeding created mouse lines divergent for ethanol drinking (high drinking short-term selected line [STDRHI], low drinking [STDRLO]) or ethanol-induced conditioned taste aversion (CTA; high [HTA], low [LTA]). Compared with STDRLO, STDRHI mice consumed more saccharin and less quinine, exhibited greater ethanol-induced conditioned place preference (CPP), and showed reduced ethanol stimulation and sensitization under some conditions; a line difference in ethanol-induced CTA was not consistently found. Compared with LTA, HTA mice consumed less ethanol but were similar in saccharin consumption, sensitivity to ethanol-induced CPP, and ethanol-induced locomotor stimulation and sensitization. These data suggest that ethanol drinking is genetically associated with several reward-and aversion-related traits. The interpretation of ethanol-induced CTA as more genetically distinct must be tempered by the inability to test the CTA lines beyond Selection Generation 2. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Safety aspects of the combined HTTR/steam reforming complex for nuclear hyrogen production

The High-Temperature Engineering Test Reactor (HTTR) in Oarai, Japan, has the potential to demonstrate the production of hydrogen by steam reforming and using nuclear process heat as primary energy input. Particular safety aspects for such a combined nuclear/chemical complex have been investigated such as fire and explosion hazard at presence of flammable gases (LNG, H₂, CO) near the reactor building. A methane vapor cloud in the open atmosphere or partially obstructed areas is highly unlikely to detonate and damage the reactor building. Theoretical assessments and experimental studies significant to the HTTR-steam reforming system, include the spreading and combustion behavior of cryogens and flammable gases providing the basis for a comprehensive safety analysis of the nuclear/chemical facility.     

热轧窄带钢粗轧强迫宽展孔型的模拟研究

按照现场使用165mm×280mm连铸坯轧制宽度为355mm带钢粗轧孔型尺寸及轧制规程的有关数据,对热轧窄带钢的粗轧强迫宽展孔型进行模拟试验。通过改进粗轧孔型尺寸使展宽系数提高,使用165mm×280mm连铸坯能够轧制宽度约为400mm的窄带钢。     

某型蒸汽发生器的水位模糊控制

本文详细的介绍了模糊控制在蒸汽发生器的水位控制中的应用。目的是对蒸汽发生器水位进行控制,就是将水位控制在目标值附近,以达到反应堆安全经济运行的需要。仿真结果表明:同传统的PD控制相比较,采用模糊控制减小了超调量,加快了收敛速度,能够达到预期的效果。     

Fuel coolant interaction experiments in TROI using a UO2/ZrO2 mixture

This paper discusses the results of steam explosion experiments using reactor material carried out under “Test for Real cOrium Interaction with water (TROI)” program. About 4–9 kg of corium melt jet is delivered into a sub-cooled water pool at atmospheric pressure. Spontaneous steam explosions are observed in four tests among six tests. The dynamic pressure, dynamic load, and morphology of debris clearly indicate the cases with steam explosion. The initial conditions and results of the experiments are discussed.     

汽轮机驱动往复式压缩机的技术探讨

阐述中小氮肥企业采用汽轮机替代电机驱动往复式压缩机来降低成本的迫切性对汽轮机设计的特殊要求，分析汽轮机转子的强度，系统的正常开停机和紧急停机对汽轮机的影响，以及汽轮机替代电机驱动往复式压缩机的投资和收益。图2     

绕花丝管内插物对蒸汽——空气混合物系凝结换热性能的影响

对蒸汽在竖直管内的凝结换热进行了实验研究。实验表明，含有不凝性气体（空气时，蒸汽在光管内的凝结换热性能显著下降，而当蒸汽流速增大时，下降程度减小，进一步证实了现有的理论结果。特别是，实验发现，当管内插入大空隙率花丝元件时，能显著改善不凝性气体对蒸汽凝结换热的不利影响。此结果将对非共沸制冷工质的广泛使用产生深远影响。     

井楼油田零区浅薄层稠油试验区注蒸汽开采综合评价

井楼油田零区试验区是典型的浅薄层特稠油注蒸汽开采先导试验区,经历了蒸汽吞吐和蒸汽驱两个阶段.本文从油藏地质特点和注蒸汽开采特点出发,系统阐述了这类油藏注蒸汽开采的技术策略,从油层动用状况、开发指标和经济指标三个方面对注蒸汽开采效果进行了综合评价.     

浅谈优化电站锅炉主蒸汽温度自动调节系统设计

文章着重分析了锅炉主汽温调节对象的特点，并结合灞桥热电厂10^#锅炉主汽温调节系统的实际情况进行深入研究。系统选用T640智能型调节器。并在组态中采用常规的PID调节，还针对主汽温度系统惯性时间长的特点，采用了“超前——滞后”模块，取得了良好的效果。解决了灞桥热电厂10^#炉主汽温自动调节系统长期未能投入运行的问题，提高了自动投入率，达到了安全经济运行的目的。