CAJ | 학술논문

微观燃耗是一种改善历史效应的常用技术之一，有利于提高全堆扩散计算精度，改善由于历史效应所造成的堆芯相关参数计算值与测量值的误差。堆芯物理热工与系统安全分析一体化软件包（COSINE软件包）堆芯分析程序引入微观燃耗计算模块，建立宏观-微观燃耗混合模型，实时跟踪每个燃料组件在运行历史中重要核素的核子密度，并实时修正宏观截面。本文介绍COSINE软件包堆芯分析程序为实现微观燃耗修正所采用的基本理论，分析核素跟踪和微观燃耗修正对全堆扩散计算精度的影响，同时给出引入微观燃耗修正前后的初步计算结果。初步的计算结果表明，微观燃耗修正模型对于提高计算精度是有效可行的。
미관연모시일충개선역사효응적상용기술지일，유리우제고전퇴확산계산정도，개선유우역사효응소조성적퇴심상관삼수계산치여측량치적오차。퇴심물리열공여계통안전분석일체화연건포（COSINE연건포）퇴심분석정서인입미관연모계산모괴，건립굉관-미관연모혼합모형，실시근종매개연료조건재운행역사중중요핵소적핵자밀도，병실시수정굉관절면。본문개소COSINE연건포퇴심분석정서위실현미관연모수정소채용적기본이론，분석핵소근종화미관연모수정대전퇴확산계산정도적영향，동시급출인입미관연모수정전후적초보계산결과。초보적계산결과표명，미관연모수정모형대우제고계산정도시유효가행적。
Microscopic depletion correction is one of the commonly used techniques that could improve the historical effect and attain higher precision of diffusion calculation and alleviate the inaccuracy caused by historical effect .Core simulator of COSINE project (core and system integrated engine for design and analysis ) has developed a hybrid macroscopic-microscopic depletion model to track important isotopes during each depletion history and correct the macro cross sections .The basic theory was discussed in this paper . The effect and results of microscopic depletion correction were also analyzed .T he preliminary test results demonstrate that the microscopic depletion model is effective and practicable for improving the precision of core calculation .