摘要
CANDU堆区域超功率保护（ROP）系统用于缓慢失去反应性控制事故下防止燃料包壳出现烧干。机组老化会导致ROP运行裕量下降。为应对秦山第3核电厂CANDU堆ROP裕量不足的问题,通过对ROP工况分组原则、电站运行文件和运行策略、反应性控制机构设置、现有相关报警等的审查,确定出4项重分组规则;设计安装监测轴向平均区域功率偏差的报警,将共计270个工况从ROP正常手柄位置对应的工况组移出。ROP工况重分组方案在秦山第3核电厂实施后,ROP运行裕量将恢复3%~5%,可显著提升机组运行的经济性和安全性。
The Regional Overpower Protection（ROP） system is designed to prevent the dryout in any fuel channel of CANDU reactors during a slow loss of regulation（LOR） event. Reactor aging will lead to the reduction of ROP margin. To resolve the deficiency of ROP margin in Third Qinshan Nuclear Power Plant（TQNPP）, four reclassification rules are determined based on review of original ROP fluxshapes classification principle, operational documentation and policy of TQNPP, reactivity device configuration and existing DCC alarms. ZDROP alarm for monitoring axially averaged zone deviation is also developed and installed. Totally 270 fluxshapes are removed outside of ROP normal position HSP#1. The implementation of ROP reclassification scheme in TQNPP indicates nearly 3% to 5% ROP margin can be restored and additionally the economy and safety of reactor will be improved.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2016年第5期51-54,共4页
Nuclear Power Engineering
