轻量化通用活化-燃耗分析程序LightAB开发与验证  

Development and validation of LightAB:a new light general-purpose activation-burnup program

作　　者：刘浪涛 潘清泉 赵庆飞 LIU Langtao;PAN Qingquan;ZHAO Qingfei(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学核科学与工程学院,上海200240

出　　处：《核技术》2025年第2期163-172,共10页Nuclear Techniques

摘　　要：活化-燃耗计算是反应堆分析的重要组成部分,需要耦合临界输运程序和点燃耗程序来迭代求解。LightAB(Light Activation and Burnup)是一个新的轻量化的通用活化-燃耗分析程序,可以用来处理活化-燃耗系统。LightAB采用了基于燃耗计算程序ORIGEN-2和ORIGEN-S的燃耗数据库,并使用处理刚性燃耗系统的切比雪夫有理逼近算法(Chebyshev Rational Approximation Method,CRAM)。LightAB支持衰变模式,定通量模式和定功率模式的活化-燃耗计算。为了验证LightAB程序的正确性,计算了237Np衰变问题和锆(Zr)合金的固定通量辐照问题,结果与燃耗程序ORIGEN-2.1一致。实现了LightAB和RMC程序的耦合,并用于计算压水堆(Pressurized Water Reactor,PWR)栅元燃耗基准题、PWR组件燃耗问题、经合组织/核能机构(Organisation for Economic Co-operation and Development/Nuclear Energy Agency,OECD/NEA)快堆燃耗基准问题,计算结果与RMC的燃耗计算模块一致。在超钚同位素的辐照生产与RMC对比模拟计算中,LightAB展现出良好的应用前景。[Background]Reactor activation-burnup calculation is a crucial component of reactor analysis,involving an iterative process that combines criticality programs with point burnup programs.[Purpose]This study aims to design and develop a novel lightweight,general-purpose activation-burnup program,named LightAB(Light Activation and Burnup)for activation-burnup calculation.[Methods]Burnup databases on the basis of ORIGEN-2 and ORIGEN-S were utilized and the Chebyshev rational approximation(CRAM)algorithm was implemented in LightAB for accurate burnup systems.Point burnup calculations in decay mode,constant flux mode,and constant power mode were supported by LightAB with well-structured program architecture,consisting of a solver module,an I/O module,and a burnup chain module.In the meanwhile,nuclide was used as the fundamental unit of storage,and physical quantities such as burnup database path and sub-burnup step division were specified as the input module of LightAB.Thereafter,the decay of 237Np and the irradiation of Zr under fixed-flux conditions were calculated using LightAB for accuracy validation,and various reactor burnup models,including pressurized water reactor(PWR)cell,PWR assembly,and Organisation for Economic Co-operation and Development/Nuclear Energy Agency(OECD/NEA)fast reactor models,were calculated by coupling LightAB with RMC programs.Finally,LightAB was applied to the irradiation production of transplutonium isotope with comparison to RMC.[Results]Results of LightAB are consistent with that of ORIGEN 2.1 for the calculation of 237Np's decay and Zr's irradiation.Calculation results of LightAB coupling with RMS programs are consistent with RMC calculations.The errors between LightAB and RMC for production calculation of transplutonium isotope in three cases are within 5%.[Conclusions]LightAB has shown promising application prospects in the irradiation production of transplutonium isotopes compared with RMC simulation calculations.

关 键 词：LightAB 燃耗计算 CRAM 超钚同位素 蒙特卡罗 

分 类 号：TL329.2[核科学技术—核技术及应用]