Depressurization strategy of China's advanced pressurized water reactor under typical accidents

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2024-09-26 DOI:10.1016/j.pnucene.2024.105459

Ji Xing , Pei Yu , Zhaoming Meng , Dufeng Lv , Zhengrun Shang , Zhongning Sun

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Abstract

Advanced pressurized water reactor was simulated using system analysis program. The depressurization strategy for the automatic depressurization system (ADS) under typical ADS-triggering accidents (2-inch/10-inch cold leg break, inadvertent opening of the ADS, DVI pipeline break) was investigated. The results show that after these accidents, ADS can ensure the operation of the three types of safe injection tanks, with high redundancy and inherent safety. The multi-stage design of ADS aids the sparger in maintaining a stable critical jet state. In 10-inch cold leg break accident, the sparger cannot reached the critical jet state under all of pipeline fault conditions. From a system point of view, adjusting the pipeline design of ADS is necessary to avoid long-term condensation oscillation of the sparger in some accidents. From a design perspective of the local equipment, the nozzle structure of the sparger should attenuate the dynamic load caused by the condensation oscillation and back-attack phenomenon.

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典型事故下中国先进压水堆的减压策略

利用系统分析程序对先进压水反应堆进行了模拟。研究了自动减压系统（ADS）在典型触发事故（2 英寸/10 英寸冷腿断裂、ADS 意外打开、DVI 管线断裂）下的减压策略。结果表明，在这些事故发生后，ADS 能够确保三类安全注水罐的运行，具有较高的冗余度和固有安全性。ADS 的多级设计有助于喷射器保持稳定的临界喷射状态。在 10 英寸冷腿断裂事故中，在所有管线故障条件下，疏水阀都无法达到临界喷射状态。从系统角度看，有必要调整 ADS 的管路设计，以避免在某些事故中疏水阀出现长期冷凝振荡。从局部设备的设计角度来看，喷射器的喷嘴结构应减弱冷凝振荡和反击现象引起的动载荷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.