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核燃料组件运输容器隔振系统的振动分析 总被引:1,自引:0,他引:1
进行了核燃料组件运输容器隔振系统橡胶块的特性试验,测定了橡胶块的静态和动态拉压刚摩和剪切刚度,采用自由振动方法测定了橡胶块的拉压阻尼和剪切阻尼。建立了运输容器隔振系统的数学模型.对隔振系统的幅频特性和隔振传递率进行了分析,确定了系统各运动的共振频率。对运输容器系统受来自运载工具如铁道车辆或公路车辆的纵向冲击情况下的隔振性能进行了研究,导出了运载工具冲击加速度允许值的解析式,并进行了计算和分析。 相似文献
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易裂变材料运输过程中重要的安全问题之一是临界安全。在对运输货包进行临界安全分析中必须要同时考虑多货包阵列形式、事故后货包损伤对临界安全影响、最佳水慢化条件等因素。本文采用MCNP 程序针对CEFR-MOX新燃料组件运输货包进行了临界安全计算。计算结果表明:MCNP程序(采用核截面库为ENDF/B-V库)对本问题的次临界限值为0.924 6;正常运输条件下无限个运输货包的最大keff值为0.574 4,运输事故条件下无限个运输货包的最大keff值为0.659 7。根据临界安全指数的定义,确定CEFR-MOX新燃料组件运输货包的临界安全指数为0。 相似文献
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采用基于蒙特卡罗方法的MCNP5程序对高温气冷堆所用的球形燃料元件进行描述;根据包覆燃料颗粒在燃料球内的分布性质构建了8种不同模型,并研究不同模型对有效增殖因子(keff)和计算时间的影响,获得了临界计算问题中最优的燃料球模型;运用MCNP5描述燃料球运输容器,并研究了容器中子吸收板厚度、外容器壁厚、缓冲层材料、反射层材料、容器形状、容器结构缺失和水密度等影响运输容器临界安全的因素。结果表明,所研究的高温气冷堆新燃料元件运输容器在正常运输条件下和事故运输条件下均处于临界安全状态,其临界安全指数(CSI)可定为0。 相似文献
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某反应堆燃料组件的运输采用铁路运输,燃料组件运输容器的代号为MTR-D,采用栓系系统固定运输容器.针对燃料组件运输容器MTR-D,已经完成了正常和事故条件下的安全性分析.为论证栓系系统是否满足强度方面的要求,是否能够保证货包不会前后、左右以及垂直方向的移动,本工作采用经验公式,计算了运输过程中货包承受的力,同时校核了压紧螺杆的稳定性.计算结果表明,运输栓系系统能满足铁路运输燃料组件的要求. 相似文献
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本文介绍了秦山核电厂一期工程1:1燃料组件高温高压冲刷实验压力容器的设计。该设备的主要特点是:无级调节错对中量,弹性支撑,可做横向冲刷实验,并可用于600MW,900MW和1200MW核电厂全尺寸燃料组件的冲刷实验。 相似文献
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《Packaging, Transport, Storage and Security of Radioactive Material》2013,24(3-4):361-364
AbstractTransport of fresh MOX fuel assemblies for the prototype FBR MONJU initial core started in July 1992 and ended in March 1994. As many as 205 fresh MOX fuel assemblies (109 assemblies for an inner core, 91 assemblies for an outer core and 5 assemblies for testing) were transported in nine transport missions. The packaging for fuel assemblies, which has shielding and shock absorbing material inside, meets IAEA regulatory requirements for Type B(U) packaging including hypothetical accident conditions such as the 9 m drop test, fire test, etc. Moreover, this packaging design features such advanced technologies as high performance neutron shielding material and an automatic hold-down mechanism for the fuel assemblies. Every effort was made to carry out safe transport in conjunction with the cooperation of every competent organisation. This effort includes establishment of, the transport control centre, communication training, and accompanying the radiation monitoring expert. No transport accident occurred during the transport and all the transport missions were successfully completed on schedule. 相似文献
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《Packaging, Transport, Storage and Security of Radioactive Material》2013,24(1-2):101-108
AbstractThe use of Mixed Oxide Fuels (MOX) in commercial reactors has increased significantly over the past 10 years as an effective way of using stocks of plutonium produced from reprocessing uranium fuels. Now, with advances in fuel design, MOX can give performance approaching that of enriched uranium fuel. To meet demand from European and Japanese utilities, British Nuclear Fuels are in the process of commissioning a large capacity plant at Sellafield to assemble MOX fuels. This has required a new transport package to be developed capable of carrying high specification fuels to customers in Europe whilst complying with the 1996 IAEA ST-1 Transport Regulations. This package is known as Euromox and currently under development to enter service in 2003. Relatively few packages exist for the transport of MOX fuels and Euromoxis the first designed by BNFL for shipments to Europe. Euromox has provided several technical challenges in its development arguably exceeding those typically encountered during the development of new package for irradiated fuel transports. 相似文献
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为了准确探究反应堆冷却剂与燃料组件间存在流固耦合行为对燃料组件振动特性的影响,本文采用计算流体动力学(CFD)软件Fluent平台,运用其中的动态网格技术,以压水堆燃料组件为研究对象,通过建立燃料组件模拟棒束、堆芯围板以及冷却剂模型,实现燃料组件与堆芯围板分别单独运动工况的燃料组件附加质量计算。结果显示:燃料组件运动工况下,燃料组件附加质量系数均值为2.4712;围板运动工况下,燃料组件附加质量系数均值为–3.4713,均与文献值偏差小于5%。叠加附加质量后,燃料组件振动频率计算值与水中振动试验测试结果偏差小于5%,验证了分析方法的合理性。本研究建立的仿真计算方法能够用于压水堆燃料组件附加质量计算。 相似文献