Abstract An uncertainty analysis based on the Latin Hypercube Sampling (LHS) method and MELCOR code for hydrogen production during a SA in WWER1000 nuclear reactor is presented. Firstly, the total amount of the produced hydrogen during the SBO with Large Break Loss of Coolant Accident (SBO-LBLOCA), SBO with Small Break Loss of Coolant Accident (SBO-SBLOCA) and Station Black Out (SBO) is estimated by the MELCOR code and benchmarked with the RELAP-SCDAP. In addition, the uncertainty of the effective parameters on the hydrogen generation is analyzed during both in-vessel and ex-vessel phases of the SA. The results showed that the SBO produces more hydrogen compared to other accident scenarios. Also, the range of the produced hydrogen varies between 255 and 525 kg and 812–1820 kg during the in-vessel and ex-vessel phases of the SBO, respectively. The falling debris heat transfer coefficient and Zr melt release temperature have the greatest effect on the hydrogen generation.

中文翻译：

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严重事故代码在 WWER1000/V446 制氢敏感性和不确定性分析中的应用

摘要 提出了基于拉丁超立方抽样(LHS) 方法和MELCOR 代码的WWER1000 核反应堆SA 制氢不确定性分析。首先，MELCOR 估算了冷却液大断损事故 (SBO-LBLOCA)、冷却液小断损事故 (SBO-SBLOCA) 和站停电 (SBO) 期间产生的氢气总量代码并使用 RELAP-SCDAP 进行基准测试。此外，在 SA 的船内和船外阶段分析了氢气产生的有效参数的不确定性。结果表明，与其他事故情景相比，SBO 产生更多的氢气。此外，在 SBO 的船内和船外阶段，产生的氢气范围分别在 255 和 525 千克和 812 到 1820 千克之间变化。