秦山第二核电厂混合堆芯一回路锂浓度控制  

The Lithium （Li） Concentration Control of Mixed Core at Qinshan Ⅱ Nuclear Power Plant

作　　者：秦建华 韩玉刚 

机构地区：[1]核电秦山联营有限公司,浙江海盐314300

出　　处：《核电工程与技术》2008年第4期28-33,共6页Nuclear Power Engineering and Technology

摘　　要：核电厂一回路材料（不锈钢、镍基合金、锆合金等）长时间处于高温高压的冷却剂条件下，难免受到一定的腐蚀。核电厂通过向一回路加入氢氧化锂提高冷却剂pH的方法降低结构材料的腐蚀速率，降低堆外的辐射场。秦山第二核电厂采用混合堆芯后，修改了锂浓度控制规范，把寿期初的控制上限由2．35ppm升高到3．0ppm，同时扩大了硼锂协调控制范围。本文利用几年来的实践经验对混合堆芯一回路锂浓度控制方法进行了总结，针对不同阶段锂浓度控制的特点提出了合理的控制方式和关注点，对目前锂控制存在的问题提出了建议。The primary system material is under high temperature and pressure condition during operation. The material corrosion will inevitably occur. In order to reduce the material corrosion rate and radioactivity dose out of the core , the elevated pH control program was adopted nuclear power plant by adding ^7LiOH. The lithium specification was modified to meet the requirement of mixed core. The upper limit of Li concention at beginning of cycle was changed from 2.35ppm to 3.0ppm. This paper summarizes,the experience of Li concentration control at mixed core of Ⅱ nuclear power plant, with some suggestions for Li control.

关 键 词：核电厂 锂浓度 混合堆芯 硼锂协调控制 

分 类 号：TM623[电气工程—电力系统及自动化] TQ053.2[化学工程]