电子加速器驱动的次临界热中子堆中嬗变MA的模拟研究
Simulation of MA Transmutation in Electron Accelerator-Driven Subcritical Thermal Reactor

要实现以高能质子为驱动的ADS在技术上还面临着较大的困难，而电子加速器和热中子堆都已经是成熟的技术，本研究结合两项成熟的技术，对电子加速器驱动的次临界热中子堆进行模拟。电子加速器驱动的次临界热中子堆既具有技术上的可行性，安全性，经济性，又有优秀的嬗变能力。研究电子加速器驱动的次临界热中子堆为乏燃料的后处理提供了新的思路，具有重要意义。研究使用MCNP程序在M310堆型的基础之上搭建热中子堆模型，通过将MA制成管状插入堆芯的方法，利用自屏蔽效应，得出的研究结果表明：在电子加速器驱动的次临界热中子堆中引入MA进行嬗变，其对堆芯keff的影响很小，且MA装载量可观；对堆芯keff造成的影响可以通过调节硼浓度来补偿，MA嬗变产物的收集也很容易。计算结果表明了在电子加速器驱动的次临界热中子堆中嬗变MA的可行性，为乏燃料中MA的安全、经济、高效的后处理提供了参考。
In order to realize ADS driven by high-energy protons, there are still great difficulties in technology. While the technology of electron accelerators and thermal reactors are mature, eADS has the advantages of ADS which has safety, economy, and excellent transmutation ability. The study of elec-tron accelerator-driven subcritical thermal reactor provides new ideas for spent fuel reprocessing. We use MCNP program to construct thermal reactor model on the basis of M310 reactor. The research result is obtained by inserting MA into the core in tubular form and using the self shielding effect. The results show that the introduction of MA into the electron accelerator-driven subcritical thermal reactor has little effect on the core, and the MA loading amount is considerable. The effect can be compensated by adjusting the boric acid concentration, and the collection of MA transmutation products is convenient. This paper illustrates the feasibility of transmutation of MA in an elec-tron accelerator-driven subcritical thermal reactor, and provides a reference for safe, economical and efficient post-processing MA.