新形势下的燃料管理优化

Fuel Management Optimization Under New Situation

为解决新形势下燃料管理灵活性不足的问题,基于CPR1000机组,本文提出了16~20月的换料燃料管理策略,将机组的大修时间调整至负荷减载严重的春节和国庆假期,以提高发电量。计算给出了相关通用核数据和关键中子学参数,并进行了经济性分析。结果表明,^(235) U富集度为4.00%和4.45%的双富集度方案满足燃料管理安全准则要求,堆芯关键中子学参数与优化前周期为18月周期性换料的限值一致,当前燃料管理策略和方案具备工程实施的可行性;燃料管理优化后,预计每年每台机组通过多发电可获得收益1200万~2400万元,同时避免提前停堆弃料带来的燃料损失。

Based on CPR1000 core,a 16-20 month refueling fuel management scheme is designed.The general nuclear data and key neutron parameters are calculated,and the economic analysis is carried out.The results show that the double enrichment schemes of 4.00%and 4.45%meet the requirements of fuel management safety criteria,and the core key neutron parameters are consistent with the current 18 month refueling limits.The current fuel management strategy and scheme are feasible for engineering implementation.With the fuel management optimization,it is estimated that each unit can obtain an annual income of 12-24 million RMB through more power generation,and at the same time,losses caused by early shutdown and waste materials can be avoided.