秦山二期长循环堆芯燃料管理方案设计及其经济性分析
Fuel Management Study and Economic Analysis of Long-term Refueling for Qinshan-II NPP
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摘要:
秦山二期目前采用36组富集度为3.7%的换料组件的OUT-IN年换料燃料管理策略，从2号机组第11燃料循环开始第一个长循环过渡，采用44组富集度为4.45%的换料组件的IN-OUT长循环燃料管理策略。文章以此为基础，开展了秦山二期燃料管理方案设计，共给出2个长循环燃料管理方案：1个采用44组富集度为4.45%的换料组件，1个采用48组富集度为4.45%的换料组件。然后对这2个燃料管理方案的平衡循环进行经济性分析计算，逐一介绍发电量和燃料费用的计算，以及停堆维修频率不一样而产生的对电站成本的影响。通过这2个燃料管理方案设计及其经济性分析，推荐采用48组富集度为4.45%的长循环换料方案作为秦山二期长循环燃料管理策略的补充方案，实用性较强。 Abstract:The fuel management study on long-term refueling is presented for Qinshan-II NPP. The four units of Qinshan-II NPP adopt OUT-IN reloading pattern and annually refueling now, with 36 assemblies containing 3.7% enriched UO2 fuel. For 18-month long term refueling, 44 assemblies with 4.45% enriched fuel and IN-OUT reloading pattern will be used. However, the cycle length of designed long-term reloading pattern is not enough, as a result, the NPP utilization is reduced. A fuel management strategy, employing 48 assemblies with 4.45% enriched fuel and IN-OUT reloading pattern, is introduced. The economic analyses of the three fuel management strategies, including the income of electricity generation, expenditure of fuel assembly cost and effect of NPP Outage frequency, are investigated. Several advantages are deduced by compare analysis. So the introduced strategy is recommended for the Qinshan-II NPP 18-month long term refueling.
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