Research on design margin of steam generator in CPR1000 units

CHAI Weidong; ZHAO Qingsen

doi:10.19666/j.rlfd.201807150

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Research on design margin of steam generator in CPR1000 units

Thermal Power Generation Vol. 48, Issue 3, Pages: 126-131(2019)

更新时间：2025-09-28

- Research on design margin of steam generator in CPR1000 units
- 作者机构：
  
  1. 大亚湾核电运营管理有限公司
  2. 苏州热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201807150
  CLC： TK172;TM623.9
- Published Online：26 February 2019，
  
  Published：2019
- 稿件说明：
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CHAI Weidong, ZHAO Qingsen. Research on design margin of steam generator in CPR1000 units[J]. Thermal Power Generation, 2019, 48(3): 126-131.
DOI：

CHAI Weidong, ZHAO Qingsen. Research on design margin of steam generator in CPR1000 units[J]. Thermal Power Generation, 2019, 48(3): 126-131. DOI： 10.19666/j.rlfd.201807150.

摘要

国内新投产的CPR1000机组普遍存在蒸汽发生器(SG)裕度试验不满足验收准则要求的问题

表现为蒸汽发生器出口压力低

已影响到汽轮机出力。对此

本文通过设计分析、试验验证和现场视频检查等手段进行了系统分析。以Framtone公司和Westinghouse公司设计的55/19型、60F型和Δ125型蒸汽发生器为研究对象

利用设计数据搭建数学模型

对传热面积进行了校核计算;考察了堵管率、一回路流量和一回路平均温度对蒸汽发生器出口压力的影响;验证计算了早期及新投产核电厂蒸汽发生器裕度试验数据;最后根据现场对蒸汽发生器的视频检查情况

确定新投产的CPR1000机组裕度考核不合格的根本原因为二次侧的结垢。

Abstract

The design margin test results of steam generator(SG) does not meet the requirements of acceptance criterion in CPR1000 units in China

the outlet steam pressure of the SG is low

and the low steam pressure has affected the output of steam turbine. Taking the 55/19

60 F and Δ125 steam generators designed by Framtone and Westinghouse as the research objects

a mathematical model was established based on the design data

and the heat transfer area was checked and calculated. The influence of pipe plugging rate

primary loop flow rate and primary loop average temperature on the SG outlet pressure were investigated. The test data of SG margin in nuclear power plant were verified and calculated. Finally

according to the video inspection of SG on site

it found that the root cause for the unqualified SG margin test of new CPR1000 units was the scaling on the secondary side.

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Related Author

ZHU Xing- bao The SUE Department of CNPEC

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LIU Shaoyin Hubei Provincial Electric Power Testing & Research Institute

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