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A novel integrated approach for the hazardous radioactive dust source terms estimation in future nuclear fusion power plants

机译:未来核聚变电厂中有害放射性粉尘源项估算的一种新型综合方法

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摘要

An open issue still under investigation by several international entities working on the safety and security field for the foreseen nuclear fusion reactors is the estimation of source terms that are a hazard for the operators and public, and for the machine itself in terms of efficiency and integrity in case of severe accident scenarios. Source term estimation is a crucial key safety issue to be addressed in the future reactors safety assessments, and the estimates available at the time are not sufficiently satisfactory. The lack of neutronic data along with the insufficiently accurate methodologies used until now, calls for an integrated methodology for source term estimation that can provide predictions with an adequate accuracy. This work proposes a complete methodology to estimate dust source terms starting from a broad information gathering. The wide number of parameters that can influence dust source term production is reduced with statistical tools using a combination of screening, sensitivity analysis, and uncertainty analysis. Finally, a preliminary and simplified methodology for dust source term production prediction for future devices is presented.
机译:可以预见的核聚变反应堆安全与保安领域的几个国际实体仍在调查一个未解决的问题,即对对运营人和公众以及对机器本身的效率和完整性造成危害的源术语的估计在发生严重事故的情况下。源项估算是未来反应堆安全评估中要解决的关键关键安全问题,当时可用的估算还不够令人满意。迄今为止,由于缺乏中子学数据以及不够精确的方法,因此需要用于源项估计的集成方法,该方法可以提供足够准确的预测。这项工作提出了一种从广泛的信息收集开始估算尘埃来源项的完整方法。使用筛选,敏感性分析和不确定性分析相结合的统计工具,可以减少可能影响粉尘源项产生的大量参数。最后,介绍了用于未来设备的粉尘源项产量预测的初步和简化方法。

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