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快中子临界装置电气贯穿件 总被引:1,自引:0,他引:1
介绍了用于快中子临界装置堆厅且不截断电缆的电气贯穿件,该贯穿件结构简单,便于电缆更换.贯穿件气密性试验和堆厅整体密封包容性试验结果表明,电气贯穿件的气密性优于设计指标,且使得堆厅整体密封包容性满足快中子临界装置正常运行和事故情况下的使用需求. 相似文献
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提高快中子临界装置理论计算的精确性是未来发展的需要.本文综述了快中子临界实验宏观检验的起源、作用、检验方法、实验测量水平,概述了国内外研究情况,并结合我国的实际情况,给出了建议. 相似文献
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241Am-Be中子源被广泛用于实验研究,为保护实验人员免受中子及γ射线照射,需要设计适当的屏蔽。利用蒙特卡罗方法计算中子透射不同材料后的能谱分布与剂量,优选各层屏蔽材料种类与厚度,设计一套241Am-Be中子源紧凑型屏蔽装置。装置由内而外采用钨+聚乙烯+含硼聚乙烯+不锈钢进行防护,外表面周围剂量当量率H*(10)低于10μSv/h,满足辐射防护要求。同时对装置内部热中子、超热中子和快中子注量分布进行研究,确定装置快中子和热中子输出通道最佳位置。在辐照装置同时开放快中子和热中子通道进行实验测试时,需要设置距离大于130 cm的控制区,以保障操作人员安全。 相似文献
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杨历军 《中国原子能科学研究院年报》2005,(1)
DF-VI快中子临界装置的运行、维护等工作严格按照运行质量保证大纲和各安全运行管理规程的要求进行,切实贯彻“安全第一,质量第一”的质量方针,在完成科研工作的同时,确保实现了安全运行,圆满地完成运行和实验研究工作,确保上等级事故发生率为零的目标。2005年,该装置共运行7次 相似文献
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《核技术(英文版)》2016,(6):202-206
The fuel assembly is key structure in China Initiative Accelerator Driven System, and the axial fitting clearance (AFC) for the fuel assembly design is an essen-tial subject of study. In this paper, different methods are used to calculate critical stress in cylindrical shells. Because the thermal expansion of fuel assembly outer tube is larger than that of the cladding of fuel rod, enough space should be reserved between the upper end plug and upper seat slot. The collapse critical compressive stress of the cladding is obtained numerically through ANSYS simula-tion calculation. The AFC range between the fuel rod cladding and the end seat due to the displacement of thermal expansion is given by the theoretical formulas and ANSYS buckling analysis. These provide a reference for the AFC design of the reactor fuel assembly. 相似文献
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J. Hofmeister C. Waata J. Starflinger T. Schulenberg E. Laurien 《Nuclear Engineering and Design》2007,237(14):1513-1521
The European concept of the High Performance Light Water Reactor (HPLWR) differs from current light water reactors in a higher system pressure beyond the critical point of water, as well as a higher heat-up of the coolant within the core and thus higher core outlet temperatures, leading to a significant increase in turbine power and thermal efficiency of the power plant. The motivation to develop a novel fuel assembly for the HPLWR is caused by the high variation of coolant density in the core by more than a factor of seven. A systematic design study shows that a square fuel assembly with two rows of fuel rods and a central moderator box is best to minimize the structural material, to optimize the moderator to fuel ratio and to reduce differences of fuel rod power. Using neutronic and thermal-hydraulic analyses, a detailed mechanical design of a fuel assembly of the HPLWR has been worked out. Moreover, concepts for the head piece, the foot piece, the steam plenum and the lower mixing plenum, including the lower core plate, have been developed to account for the individual flow paths of this reactor. These allow a leak-tight counter current flow of moderator water and coolant as well as uniform mixing of different mass flows. The assembly design concept can be used as a general key component for any advanced core design of this reactor. 相似文献
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WWER-1000燃料组件特点及棒弯曲分析 总被引:1,自引:0,他引:1
本文根据WWER-1000反应堆的设计特点及其运行实践,阐述了WWER-1000燃料组件的设计特点,并与西方压水堆燃料组件进行了相应的比较.重点分析论述了WWER-1000反应堆燃料棒弯曲的特点,以及在热工水力和燃料组件设计中是如何考虑棒弯曲效应的,进行了燃料棒弯曲对临界热流密度影响实验的研究.结果表明:WWER-1000燃料组件在整个运行寿期内的性能是可以保证的. 相似文献
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国家重大科学工程——上海光源工程的主体是一复杂、精密的大科学装置,由成千上万、大小不一的设备组成,其中很多关键元件均应达到亚毫米量级的安装定位精度要求。在工程设计阶段,利用SolidEdge及UG等三维机械设计软件进行元件的设计及虚拟装配,避免了设备之间的相互干涉;在首批设备加工之后,实施了多次模拟安装,以查找设计缺陷,进一步对设计进行优化,为批量生产的批准提供依据;在工程安装阶段,利用激光跟踪仪、关节测量臂等三维准直测量仪器,保证设备之间0.2mm量级的安装精度,并提前3个月实现获得同步辐射光这一关键工程节点。 相似文献
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Hyung Min SonKune Yull Suh 《Progress in Nuclear Energy》2011,53(7):825-830
The Battery Omnibus Reactor Integral System (BORIS) is being developed as a multipurpose integral fast reactor at the Seoul National University. This paper focuses on developing design methodology for optimizing geometry of the liquid metal cooled reactor vessel assembly. The key design parameters and constraints are chosen considering technical specifications such as thermal limits and manufacturing difficulties. The evolution strategy is adopted in optimizing the geometry. Two objective functions are selected based upon economic and thermohydraulic reasons. Optimization is carried out in the following steps. First, selected design values are supplied to the momentum integral model code to evaluate steady-state mass flow rate and coolant temperature distribution of the reactor vessel assembly utilizing the thermodynamic boundary condition on heat exchanger calculated by the thermodynamics code. Second, the objective function values are calculated and compared against the previous results. The steps are repeated until an optimum value is obtained. Results of the improved design of the reactor vessel assembly are presented and their characteristics are discussed. 相似文献
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