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首页> 外文期刊>Annals of nuclear energy >Uncertainty quantification method for RELAP5-3D© using RAVEN and application on NACIE experiments
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Uncertainty quantification method for RELAP5-3D© using RAVEN and application on NACIE experiments

机译：RAVEN方法对RELAP5-3D©的不确定度定量方法及其在NACIE实验中的应用

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摘要

The best estimate plus uncertainty (BEPU) method plays a key role in the development of the innovative Generation IV nuclear reactors, for the improvement of knowledge and the good evaluation of the safety margins for new phenomena. The aim of this paper is to validate an uncertainty quantification (UQ) approach using RAVEN code. RAVEN, developed at the Idaho National Laboratory, is a multipurpose probabilistic and uncertainty quantification framework, capable to communicate with any system code, implemented with an integrated validation methodology involving several different metrics. In this activity, a coupled calculation RELAP5-3D/RAVEN has been performed to assess the validity of the embedded UQ approach. The simulations have concerned two tests conducted on NACIE (NAtural Circulation Experiment) facility, a non-nuclear loop-type system using Lead-Bismuth Eutectic (LBE) as coolant, realized at the ENEA Brasimone Research Centre (Italy) to support the development of the GEN-IV reactors. The experimental tests are aimed to investigate the phenomena related to the natural and gas enhanced circulation flow regimes of heavy liquid metals (HLM), and to test and validate the main components in a LBE environment. A numerical 1D model of NACIE facility has been realized and the post-test analysis has been carried out using RELAP5-3D(C) ver. 4.3.4. Based on these results, a statistical analysis has been performed using RAVEN computer code, investigating the capability of three probabilistic comparison metrics fully integrated in the code. (C) 2018 Elsevier Ltd. All rights reserved.
机译：最佳估计加不确定度（BEPU）方法在创新的第四代核反应堆的开发中起着关键作用，以提高知识水平和对新现象的安全裕度进行良好的评估。本文的目的是验证使用RAVEN代码的不确定性量化（UQ）方法。由爱达荷州国家实验室开发的RAVEN是一个多用途概率和不确定性量化框架，能够与任何系统代码进行通信，并使用涉及多个不同度量的集成验证方法来实现。在此活动中，已执行耦合计算RELAP5-3D / RAVEN来评估嵌入式UQ方法的有效性。该仿真涉及在NEAIE（自然循环实验）设施上进行的两项测试，这是一种使用铅-铋共晶（LBE）作为冷却剂的非核环型系统，已在ENEA布拉西莫内研究中心（意大利）进行，以支持该技术的发展。 GEN-IV反应堆。实验测试旨在研究与重金属液体（HLM）的自然和气体增强循环流态有关的现象，并测试和验证LBE环境中的主要成分。已经实现了NACIE设备的一维数值模型，并使用RELAP5-3D（C）ver。进行了测试后分析。 4.3.4。基于这些结果，已使用RAVEN计算机代码进行了统计分析，调查了完全集成在代码中的三个概率比较指标的功能。 （C）2018 Elsevier Ltd.保留所有权利。

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