电子加速器驱动次临界系统的靶物理设计及耦合计算  

Target Physical Design and Coupling Calculation of Electron Accelerator Driven Subcritical System

作　　者：张新营 刘滨[1] 付鹏[1] 盛洁[1] ZHANG Xinying;LIU Bin;FU Peng;SHENG Jie(North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学,北京102206

出　　处：《核科学与工程》2021年第5期1047-1054,共8页Nuclear Science and Engineering

摘　　要：为避免ADS所存在的技术及成本问题,考虑电子加速器驱动次临界系统的技术路线。利用加速器产生的高速电子通过韧致辐射作用产生高能光子,高能光子与靶材料发生光核反应产生外源中子来驱动次临界系统。为了系统地研究eADS的综合性能,论文设计了韧致辐射靶和光核反应靶,建立整个耦合系统模型,用于电子、光子和中子耦合的堆芯物理计算。计算结果显示:90 MeV能量以内的电子与靶作用,均能产生较高的热中子通量,并可用于驱动次临界堆芯的持续裂变反应;驱动eADS所需的电子流强在几毫安以内,在技术上也可实现,因此认为eADS具有较高的可行性。To avoid the technical difficulty and high cost issue of ADS,consider the technical solution of electron accelerator driven subcritical system. The accelerators generate high-energy electrons to emit Bremsstrahlung photons,and photons react with the target material to generate external neutrons to drive the subcritical systems. This study designs an electron accelerator-driven-subcritical system by coupling the electron,photon and neutron transport. We use MCNPX code to simulate this subcritical system, design the core parameters,and select the target materials and geometrical size. Then we calculate the subcritical system keff and analyze electron current intensity. The results indicate that incident electron beam of kinetic energy under 90 MeV collides on the suitable target materials can produce enough thermal neutron flux,to drive thermal reactor cores;electron current intensity analysis shows that electron current required drive to eADS also meets the requirements. The neutrons produced though Bremsstrahlung and photonuclear reaction can used to drive subcritical thermal reactors and ensure the safe operation of the subcritical system.

关 键 词：电子加速器驱动次临界系统 靶物理设计 耦合系统 堆芯物理 电子流强 

分 类 号：TL99[核科学技术—核技术及应用]