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核废料处理新方法

关键词:核电,Fluent
简介:
Computer simulation is playing a critical role in designing accelerator-driven transmutation of waste (ATW) systems that may help solve the problem of disposing of nuclear waste. ATW systems are designed to destroy long-lived fission products, reducing the time required for the waste to decay naturally from 10,000 to less than 1,000 years. One of the key components in the ATW concept is a target that is bombarded with protons from a linear accelerator, which in turn produces neutrons that sustain the transmutation of the waste to a stable or less radioactive material. A huge amount of heat is generated during this process, called spallation, which can be removed with a liquid lead-bismuth eutectic (LBE). One of the greatest design challenges in developing a working ATW system is designing the target and its operating conditions to maintain the proper temperature. Researchers at Los Alamos National Laboratory are using finite element analysis based computational fluid dynamics software to analyze target designs produced by engineers at the Institute of Physics and Power Engineering (IPPE) and the Experiment and Design Organization-"Gidropress" (EDO-GP) in Russia. The results have been used to significantly improve succeeding design
iterations.


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