Function analysis for automatic depressurization system in AP1000 nuclear power plant

HUANG Xiong; L Xuefeng; LI Yilin; CHEN Yanlin

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Function analysis for automatic depressurization system in AP1000 nuclear power plant

Thermal Power Generation Vol. 45, Issue 5, Pages: 84-87(2016)

更新时间：2025-09-28

- Function analysis for automatic depressurization system in AP1000 nuclear power plant
- 作者机构：
  
  1. 华北电力大学核科学与工程学院
  2. 华北电力大学(保定)能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM623
- Published：2016
- 稿件说明：
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HUANG Xiong, L Xuefeng, LI Yilin, et al. Function analysis for automatic depressurization system in AP1000 nuclear power plant[J]. Thermal Power Generation, 2016, 45(5): 84-87.
DOI：

HUANG Xiong, L Xuefeng, LI Yilin, et al. Function analysis for automatic depressurization system in AP1000 nuclear power plant[J]. Thermal Power Generation, 2016, 45(5): 84-87. DOI：

摘要

以AP1000核电厂一回路冷管道发生大破口事故工况为例

研究自动卸压系统(ADS-1—ADS-4)对主回路压力、安全壳内压力、非能动堆芯冷却系统(PXS)和堆芯水位的影响。结果表明:在事故初期

大量冷却剂从破口释放出来

一回路的卸压过程受ADS-1—ADS-3的影响较小

而在后期

ADS-4对主回路系统压力的降低起到一定的作用;ADS-1—ADS-3对堆芯补水箱(CMT)和安全注入箱(ACC)的安全注入影响较小

ADS-4在内置换料水箱(IRWST)重力注入以及防止堆芯裸露方面作用明显。

Abstract

Taking a large break loss accident of cold leg in primary circuit in AP1000 nuclear power plant as the example

this paper investigated the effects of automatic depressurization system(ADS-1—ADS-4)on pressure in the primary system and containment

and passive core cooling system(PXS)and core water level.The results show that

in the early stage of accident

a large amount of coolant was released from the break

the ADS-1—ADS-3had little effect on reducing the primary system pressure.However

in the late stage

the ADS-4played a role in reducing the primary system pressure.The ADS-1—ADS-3affected the core make-up water tank(CMT)and accumulator(ACC)little.The ADS-4played a key role in actuating in-containment refueling water storage tank(IRWST)gravity injection and preventing reactor core from being uncovered.

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