本文選題：三維　切入點：瞬態(tài)　出處：《強激光與粒子束》2017年06期

【摘要】：主要介紹了自主化中子時空動力學(xué)程序CORCA-K的相關(guān)研發(fā)進展。CORCA-K程序是中核集團自主研發(fā)的NESTOR軟件包中的三維瞬態(tài)中子學(xué)計算軟件。其核心功能是采用數(shù)值計算方法,求解三維瞬態(tài)中子擴散方程。其空間離散采用第二類邊界條件節(jié)塊格林函數(shù)方法,與三維穩(wěn)態(tài)擴散計算程序CORCA-3D保持自洽性;時間離散采用對角線隱式龍格庫塔格式,可在向后歐拉格式的基礎(chǔ)上疊加實現(xiàn),且具備時步自適應(yīng)功能。以三維LMW基準(zhǔn)問題、三維LRA基準(zhǔn)問題和秦山核電廠3號機組第5循環(huán)為計算對象,開展了瞬態(tài)計算驗證。結(jié)果表明,CORCA-K計算結(jié)果與參考程序符合較好,且在保證計算精度的條件下,具有更高的計算效率。
[Abstract]:This paper introduces the research and development of the autonomic neutron space-time dynamics program CORCA-K. CorCA-K program is a three-dimensional transient neutronics calculation software in the NESTOR software package developed by China Nuclear Group.Its core function is to solve the three dimensional transient neutron diffusion equation by numerical method.The spatial discretization is based on the second boundary condition nodal Green's function method, which is self-consistent with the three-dimensional steady-state diffusion program CORCA-3D, and the diagonal implicit Runge-Kutta scheme is used in the time discretization, which can be superimposed on the backward Euler scheme.And has the time-step adaptive function.The three dimensional LMW datum problem, three dimensional LRA reference problem and the fifth cycle of unit 3 of Qinshan Nuclear Power Plant are taken as the objects of calculation, and the transient calculation verification is carried out.The results show that the calculation results of CorCA-K are in good agreement with the reference program, and the calculation efficiency is higher under the condition of ensuring the calculation accuracy.
【作者單位】： 核反應(yīng)堆系統(tǒng)設(shè)計技術(shù)重點實驗室;
【基金】：數(shù)字化反應(yīng)堆項目
【分類號】：TL329.2

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