原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2015年
1期
100-105
,共6页
反应堆物理设计%IFBA%组件计算
反應堆物理設計%IFBA%組件計算
반응퇴물리설계%IFBA%조건계산
reactor physics design%IFBA%assembly calculation
表面涂有一薄层硼化锆的一体化燃料可燃吸收体（IFBA）被用作轻水堆UO2燃料组件的反应性控制。法国AREVA公司开发的SCIENCE程序包具有模拟IFBA组件的能力，但其模拟精度需经标定。本文利用APOLLO2‐F程序建立IFBA组件模型和不含IFBA组件模型，研究了组件的无限增殖因数k∞及IFBA价值，并与西屋公司结果进行比较。分析了燃料和包壳温度的处理方法以及数据库的差异对结果的影响。利用硼化锆密度修正因子评估IFBA价值偏差对堆芯参数和功率分布等的影响。结果表明：SCIENCE计算的 k∞及IFBA价值与西屋公司的结果符合较好，低燃耗区SCIENCE计算的价值偏小2％。装载8个104根IFBA棒组件的堆芯，组件相对功率最大偏差约为1％；硼浓度、功率峰因子FQ和焓升因子 FΔH的变化均不到0.1％，可忽略。先导组件采用28根或更少的IFBA棒时，可直接采用SCIENCE程序进行计算。
錶麵塗有一薄層硼化鋯的一體化燃料可燃吸收體（IFBA）被用作輕水堆UO2燃料組件的反應性控製。法國AREVA公司開髮的SCIENCE程序包具有模擬IFBA組件的能力，但其模擬精度需經標定。本文利用APOLLO2‐F程序建立IFBA組件模型和不含IFBA組件模型，研究瞭組件的無限增殖因數k∞及IFBA價值，併與西屋公司結果進行比較。分析瞭燃料和包殼溫度的處理方法以及數據庫的差異對結果的影響。利用硼化鋯密度脩正因子評估IFBA價值偏差對堆芯參數和功率分佈等的影響。結果錶明：SCIENCE計算的 k∞及IFBA價值與西屋公司的結果符閤較好，低燃耗區SCIENCE計算的價值偏小2％。裝載8箇104根IFBA棒組件的堆芯，組件相對功率最大偏差約為1％；硼濃度、功率峰因子FQ和焓升因子 FΔH的變化均不到0.1％，可忽略。先導組件採用28根或更少的IFBA棒時，可直接採用SCIENCE程序進行計算。
표면도유일박층붕화고적일체화연료가연흡수체（IFBA）피용작경수퇴UO2연료조건적반응성공제。법국AREVA공사개발적SCIENCE정서포구유모의IFBA조건적능력，단기모의정도수경표정。본문이용APOLLO2‐F정서건립IFBA조건모형화불함IFBA조건모형，연구료조건적무한증식인수k∞급IFBA개치，병여서옥공사결과진행비교。분석료연료화포각온도적처리방법이급수거고적차이대결과적영향。이용붕화고밀도수정인자평고IFBA개치편차대퇴심삼수화공솔분포등적영향。결과표명：SCIENCE계산적 k∞급IFBA개치여서옥공사적결과부합교호，저연모구SCIENCE계산적개치편소2％。장재8개104근IFBA봉조건적퇴심，조건상대공솔최대편차약위1％；붕농도、공솔봉인자FQ화함승인자 FΔH적변화균불도0.1％，가홀략。선도조건채용28근혹경소적IFBA봉시，가직접채용SCIENCE정서진행계산。
The integral fuel burnable absorber (IFBA ) coated with zirconium diboride (ZrB2 ) on the surface of UO2 pellets is used for the reactivity control of fuel assemblies in light water reactors .The SCIENCE code package developed by AREVA has the capa‐bility of simulating IFBA assembly .However ,the simulation accuracy requires calibra‐tion .The Westinghouse RFA‐2 assemblies with and without IFBA rods were modeled by APOLLO2‐F code .The infinite multiplication factor k∞ and IFBA value were studied and the corresponding results with Westinghouse were compared and analyzed .The dif‐ferent treatment methods of the fuel and cladding temperature and differences in the da‐tabase were also studied .The deviation of IFBA value may affect reactor core parame‐ters and power distribution ,and its impact was assessed by analyzing the ZrB2 density correction factor .The preliminary results show that k∞ and IFBA value calculated by SCIENCE code agree well with Westinghouse results and the former is about 2% lower than the latter at low burnup zone .The maximum of assembly relative power deviation is about 1% in the core loaded with 8 assemblies with 104 IFBA rods .The changes of boron concentration ,power peak factor FQ and enthalpy rise factor FΔH can be ignored . The lead using assembly with 28 or fewer IFBA fuel rods can be directly calculated using the SCIENCE code .
