ESTIMATION OF THE CONSEQUENCE OF THE ITPS FALLS DURING TRANSPORTATION AND PROCESSING (HANDLING) OPERATIONS

O. Vilenskii, S. Dushev, D. Lapshin, E. Novinskii, N. Rusinov
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Abstract

The main results are presented for the analysis of the process of falling of the in-object transportation packaging set (ITPS) in case of fracture of the fixing or slinging elements and estimation of the consequences of ITPS falling during transportation and processing (handling) operations. The ITPS is permitted to transfer to the limiting condition in the result of falling, when its further operation is not acceptable, and recovery of its functional condition is not expedient, excluding the possibility of falling out of the nuclear fuel (NF) or distortion of the relative position of the NF in the ITPS. To reduce the costs at the design stage the following representative calculation research of the ITPS was carried out for dynamic impacts to identify weak points of the design in case of an emergency situation. The computational analysis of falling was carried out using the module for dynamic analysis LS DYNA of ANSYS software, certified by the Rostekhnadzor authorities. LS-DYNA module is designed for computational analysis of highly nonlinear dynamic processes using an explicit integration scheme for dynamic equations.The completed full-scale mathematical 3D modeling permitted to carry out sufficiently deep and detailed analysis of dynamic processes, reducing the design duration, and it permitted to reduce the self-cost of the developed design. The results obtained for different variant of the ITPS falling permitted to analyze the collision process, to determine the values of the plastic deformation appearing in the ITPS elements and to provide recommendations for its modification.
在运输和加工(处理)操作过程中itps下降的后果的估计
研究结果主要用于分析固定件或吊挂件断裂情况下的物内运输包装装置(ITPS)坠落过程,并对运输和加工(装卸)过程中物内运输包装装置坠落的后果进行估计。如果不能接受ITPS的进一步操作,并且恢复其功能状态不适宜,则允许ITPS由于下降而转移到极限状态,但不包括核燃料(NF)脱落或NF在ITPS中的相对位置扭曲的可能性。为了降低设计阶段的成本,本文对ITPS进行了如下有代表性的动态冲击计算研究,以识别在紧急情况下设计的弱点。利用ANSYS软件中的动力学分析模块LS DYNA进行跌落计算分析,该模块已获得Rostekhnadzor权威机构的认证。LS-DYNA模块是为高度非线性动态过程的计算分析而设计的,使用显式的动态方程积分方案。完成的全尺寸数学三维建模允许对动态过程进行足够深入和详细的分析,减少设计时间,并允许降低开发设计的自我成本。所得结果可用于分析碰撞过程,确定ITPS单元出现的塑性变形值,并为其修正提供建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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