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Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts
Science and Technology of Nuclear Installations ( IF 1.1 ) Pub Date : 2019-08-14 , DOI: 10.1155/2019/9273503
Young-Hwan Kim 1 , Yung-Zun Cho 1 , Young-Soon Lee 1 , Jin-Mok Hur 1
Affiliation  

A practical scale mechanical decladder that can slit spent nuclear fuel rod-cuts (hulls + pellets) of several tens of kg HM/batch is being developed to supply UO2 pellets to a voloxidation process. The mechanical decladder is an apparatus for separating and recovering fuel material and cladding tubes by horizontally slitting the cladding tube of a fuel rod and a defective irradiated fuel rod. In this study, we address the engineering design of the mechanical decladder for the pretesting of rod-cut slitting. To obtain the requirements of the mechanical decladder, we first manufactured a slitter for testing based on the decladding and shearing conditions of hulls and pellets. The performance test of the testing device for decladding was carried out using a 2-CUT blade module and a 3-CUT blade module. We evaluated the decladding methods for the mechanical decladder and selected the 3-CUT blade module based on the results. A buckling measurement instrument was used to perform a buckling verification test according to the length of a rod-cut and to determine decladder dimensions. The optimum decladding rod-cut length for buckling prevention was calculated. Furthermore, we analyzed the decladding mechanism for various slitting methods. Design/fabrication and preliminary tests of the practical scale mechanical decladder were also performed. For this purpose, we constructed the main mechanism by utilizing the SolidWorks modeling and analysis program and fabricated a new mechanical decladder. Based on the derived requirements, a mechanical decladder with three main modules was designed and fabricated for testing. Simulated rod-cuts of zircaloy were also manufactured to test the basic performance of the decladder, and a data acquisition system was constructed using RSC 232 to measure decladding force and velocity. In the basic test, the rod-cut was completely sectioned into three evenly spaced locations by the new mechanical decladder.

中文翻译:

废核棒式切割机机械脱毛机的工程设计

正在开发一种实用规模的机械式分装机,该分装机可以分割数十公斤重金属/批的乏核燃料棒状切割物(船体+颗粒),以供应UO 2颗粒进入氧化过程。机械式脱包机是一种通过水平切开燃料棒的包覆管和有缺陷的辐照燃料棒来分离和回收燃料材料和包覆管的设备。在这项研究中,我们解决了用于棒切纵切机预测试的机械式脱包机的工程设计。为了获得机械式脱包机的要求,我们首先根据船体和粒料的脱壳和剪切条件制造了用于测试的纵切机。使用2-CUT刀片模块和3-CUT刀片模块进行了脱壳测试设备的性能测试。我们评估了机械解包器的包壳方法,并根据结果选择了3-CUT刀片模块。使用屈曲测量仪器根据切杆的长度执行屈曲验证测试,并确定梯子尺寸。计算了防止翘曲的最佳脱壳杆切割长度。此外,我们分析了各种切割方法的脱壳机理。还进行了实际规模的机械式脱毛机的设计/制造和初步测试。为此,我们利用SolidWorks建模和分析程序构造了主要的机构,并制造了一个新的机械脱笼器。根据派生的要求,设计并制造了一个带有三个主要模块的机械开袋机以进行测试。还生产了模拟的锆合金棒切机,以测试梯子的基本性能,并使用RSC 232构造了一个数据采集系统以测量脱壳力和速度。在基本测试中,通过新的机械开孔器将杆状切割机完全切成三个均匀间隔的位置。
更新日期:2019-08-14
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