摘要
目前高温气冷堆(HTGR)的二回路水质指标无相关的成熟标准可以参考,加药控制指标也没有标准。本文通过对HTGR二回路的材质和运行工况的研究,参考压水堆(PWR)和火电直流炉的运行经验,确定二回路给水pH值控制标准在9.5~9.8之间,联氨的控制标准在80~120μg/L之间可以使二回路取得较好的防腐效果;针对HTGR二回路加药系统设计现状,对加药系统设计工艺提出了优化和变更方案,用联氨表代替溶氧表,用电导率计算pH,避免了溶氧表和pH表的滞后性和不稳定性;最后,通过控制方法的改进,实现HTGR二回路加氨和加联氨系统的全自动精准控制。
There is no relevant criterion for the second circuit water quality of the high temperature gas-cooled reactor (HTGR)and for the dosing control indexes.Based on the research of the material and operating conditions of the second circuit,referring to the operation experience of PWRs and Once-through Boiler,when the pH of the second circuit water was set between 9.5-9.8 and the dosing hydrazine was controlled in 80~120μg/L,better corrosion prevention effect can be achieved in the second circuit.Based on the design status of the dosing system for the second circuit of high temperature reactors,this paper put forward the optimization and modification scheme of dosing system design,using the hydrazine meter instead of dissolved oxygen meter,calculating pH by conductivity,thus to avoid the dissolved oxygen and pH meter lag and instability.Finally,by improving the control method,the automatic and precise dosing of ammonia and hydrazine in the second circuit of HTGR can be realized.
作者
张瑞祥
张林涛
孟颖琪
王红雨
高景辉
张亚夫
Zhang Ruixiang;Zhang Lintao;Meng Yingqi;Wang Hongyu;Gao Jinghui;ZhangYafu(Xi'an Thermal Power Research Institute Co Ltd.,Xi'an,710000,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2018年第6期69-73,共5页
Nuclear Power Engineering
关键词
高温气冷堆(HTGR)
二回路加药系统
汽水品质
自动控制
High temperature gas-cooled reactor (HTGR)
Secondary circuit dosing system
Quality of steam and water
Automatic control
