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Spent nuclear fuel with a hybrid heat pipe for electricity generation and thermal management

机译：用混合热管消耗的核燃料，用于发电和热管理

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摘要

The global warming resulting from the emission of the greenhouse gases has led to tightened restrictions on the use of fossil. Therefore, renewable energy for new energy sources is being widely investigated. However, renewable energy has limitations such as location, environmental conditions, and the potential construction of a new electricity grid. Spent nuclear fuel (SNF) is one of the potential new energy candidates that does not emit the greenhouse gases or suffer from limitations of other renewable energy sources. In this research, generating electricity by using SNF is suggested with a hybrid heat pipe system. Thermal energy from SNF worldwide is similar to 750 MWth; however, this energy is not used as an energy source but just removed by chilling in water or in air in storage facilities. To achieve electricity generation from SNF, a dry storage cask with heat pipes and a Stirling engine (UCAN, UNIST CANister) are designed. Using a 1/10-scale test facility, the experimental test of heat transfer and electricity generation as the module of the storage system is conducted. The results yield good agreement with those predicted by the thermal resistance network model, and the electricity generation of the Stirling engine is in the range from 2.3% to 3.2% of the total heat load. The calculated temperature distributions are a good agreement, deviating within 12.2%, and the cooling efficiencies range from 17.51% to 26.33%. The results show the advantages of the use of SNF and its effects, focusing on thermal management and energy generation. The amount of SNF will gradually increase because of the continued operation of nuclear power plants. The usable heat from the SNF is generated due to the decay of fission products during at least several hundred years, which enables to use the SNF as one of the energy sources.
机译：温室气体排放导致的全球变暖导致对化石使用的限制越来越严格。因此，正在广泛研究用于新能源的可再生能源。但是，可再生能源具有局限性，例如位置，环境条件以及新电网的潜在建设。废核燃料（SNF）是不排放温室气体或不受其他可再生能源限制的潜在新能源候选之一。在这项研究中，建议在混合热管系统中使用SNF发电。全球SNF的热能类似于750兆瓦时。但是，这种能量不是用作能源，而是通过在存储设备中的水或空气中冷却而去除的。为了从SNF发电，设计了带有热管和斯特林发动机（UCAN，UNIST CANister）的干桶。使用1/10规模的测试设备，对作为存储系统模块的传热和发电进行了实验测试。结果与热阻网络模型预测的结果吻合良好，斯特林发动机的发电量占总热负荷的2.3％至3.2％。计算得出的温度分布吻合良好，偏差在12.2％以内，冷却效率在17.51％至26.33％之间。结果显示了使用SNF的优势及其效果，重点是热管理和能量产生。由于核电站的持续运行，SNF的数量将逐渐增加。由于裂变产物在至少几百年间的衰变而产生了来自SNF的可用热量，这使得能够将SNF用作能源之一。

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