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Full Scope Modeling and Analysis on the Secondary Circuit of Chinese Large-Capacity Advanced PWR Based on RELAP5 Code

机译：基于RELAP5代码的中国大容量先进压水堆二次回路的全范围建模与分析

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摘要

Chinese large-capacity advanced PWR under construction in China is a new and indispensable reactor type in the developing process of NPP fields. At the same time of NPP construction, accident sequences prediction and operators training are in progress. Since there are some possible events such as feedwater pumps trip in secondary circuit may lead to severe accident in NPP, training simulators and engineering simulators of CI are necessary. And, with an increasing proportion of nuclear power in China, NPP will participate in regulating peak load in power network, which requires accuracy calculation and control of secondary circuit. In order to achieve real-time and full scope simulation in the power change transient and accident scenarios, RELAP5/MOD 3.4 code has been adopted to model the secondary circuit for its advantage of high calculation accuracy. This paper describes the model of steady state and turbine load transient from 100% to 40% of secondary circuit using RELAP5 and provides a reasonable equivalent method to solve the calculation divergence problem caused by dramatic two-phase condition change while guaranteeing the heat transfer efficiency. The validation of the parameters shows that all the errors between the calculation values and design values are reasonable and acceptable.
机译：在中国建设中的中国大容量先进压水堆是核电厂领域发展过程中必不可少的新型反应堆。在核电厂建设的同时，事故序列预测和操作员培训也在进行中。由于存在一些可能的事件，例如二次回路中的给水泵跳闸可能导致NPP发生严重事故，因此，CI的训练模拟器和工程模拟器必不可少。并且，随着中国核电比例的增加，核电厂将参与调节电网的峰值负荷，这需要精确计算和控制二次回路。为了在功率变化瞬态和事故场景中实现实时和全面的仿真，由于其计算精度高的优点，已采用RELAP5 / MOD 3.4代码对次级电路进行建模。本文描述了使用RELAP5在二次回路中从100％到40％的稳态和涡轮机负载瞬态模型，并提供了一种合理的等效方法来解决由于两相状态急剧变化而导致的计算偏差问题，同时又保证了传热效率。参数验证表明，计算值和设计值之间的所有误差都是合理的并且可以接受。

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  • 来源
    《Science and technology of nuclear installation》 |2015年第2015期|913274.1-913274.7|共7页
  • 作者

    Lu Dao-gang; Zhang Fan; Sui Dan-ting; Xi Xue-zhang; Yu Lei-bo;

  • 作者单位

    North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China|North China Elect Power Univ, Beijing Key Lab Pass Nucl Safety Technol, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China|North China Elect Power Univ, Beijing Key Lab Pass Nucl Safety Technol, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China|North China Elect Power Univ, Beijing Key Lab Pass Nucl Safety Technol, Beijing 102206, Peoples R China;

    State Nucl Elect Power Planning Design & Res Inst, Beijing 100095, Peoples R China;

    State Nucl Elect Power Planning Design & Res Inst, Beijing 100095, Peoples R China;

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