کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
787263 1466068 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear dynamic impact analysis for installing a dry storage canister into a vertical concrete cask
ترجمه فارسی عنوان
تجزیه و تحلیل تاثیر پویا غیر خطی برای نصب مخزن ذخیره سازی خشک به یک بشکه بتن عمودی
کلمات کلیدی
مخزن ذخیره سازی خشک آنالیز تاثیرات، جنبش حادثه، عنصر محدود ظاهری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

In this paper, a series of dynamic impact analysis for installing a dry storage canister into a vertical concrete cask (VCC) is performed. The dry storage system considered herein is called HCDSS-69, recently developed by INER and being capable of accommodating 69 bundles of BWR spent nuclear fuels. The impact accident is stemming from a conservative consideration of accidental movement when the canister is being hoisted into a VCC. According to NUREG-0554, the accidental movement is conservatively simulated by 80 mm- and 160 mm-height free-drop motions and then with straight and 2°-oblique impact to a pedestal in VCC. A symmetric fully 3-D finite element model is built and analyzed using the explicit finite element code, LS-DYNA. Geometrical, contact, and material nonlinearities are all taken into account. The analysis result concludes that the permanent deformations of the canister are not severe to affect fuel retrieve after the impact accident and the maximum stress intensity in the canister shell can meet the ASME code appendix F F-1340, preventing the leakage of radioactive materials. The study also found that with properly reducing the wall thickness of the pedestal cylinder, the maximum acceleration and permanent deformation of the canister can be much alleviated, even though the drop height is increased to the double of the required brake distance specified in NUREG-0554. The damages of the pedestal in each analysis are moderate so that the heat transfer condition after the impact accident can be bounded by the off-normal event for half-blockage of air inlets.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volume 131, July 2015, Pages 22–35
نویسندگان
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