Stress analysis of the discharge pipe of glass solidification Joule furnace for high-level radioactive waste from nuclear waste
One of the important measures to ensure the glass solidification process of high-level radioactive waste from nuclear waste is to avoid rupture or breakage of the discharge pipe.In this paper,a mechanical model is established,and the stress effects and magnitude of different factors on the discharge pipe under service conditions are analyzed.The results show that the maximum tensile stress on the discharge pipe caused by the hydrostatic pressure of the molten high-level radioactive waste glass curing material and the self weight of the glass curing material and the discharge pipe is much smaller than the corresponding tensile strength at different service temperatures of the discharge pipe,and its impact on the risk of discharge pipe rupture is extremely low.The discharge pipe is subjected to the combined effect of hydrostatic pressure of the curing material and thermal stress caused by the temperature difference between the inner and outer walls during the stop discharge stage.The maximum tensile stress caused by this is distributed on the inner wall of the discharge pipe and is sufficient to have a significant adverse effect on the discharge pipe.By optimizing the design of the inner and outer diameters of the discharge pipe,the maximum tensile stress caused during service can be reduced to ensure the safe and reliable application of the discharge pipe.
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