论文标题
亚临界核反应堆中的任意大型中子扩增
Arbitrarily large neutron amplification in subcritical nuclear reactors
论文作者
论文摘要
在亚临界反应堆中，每个中子只产生每一代中的keff <1中子（平均渐近），因此中子种群在没有外部来源的情况下呈指数下降。因此，链反应很容易停止，使此类反应器固有地稳定。有趣的是，与共同的智慧相反，KEFF，外部源强度与反应堆的输出功率之间没有关系。在本文中，我提出了各种可能利用这一事实的策略，并将其应用于基本的多层系统的设计，该系统允许每个源中子中子任意达到任意的裂痕，同时保持Keff <1固定（我使用keff = 0.97）。通过简单的蒙特卡洛传输模拟验证放大器的行为。该提案公认会带来需要进一步研究的并发症和微妙之处，但是，如果开发的话，可以允许以微弱的中子来源驱动亚临界反应堆，例如基于放射性同位素。
In a subcritical reactor, each neutron produces only keff < 1 neutron per generation (asymptotically and on average), and thus the neutron population decreases exponentially in the absence of external source. The chain reaction is thus easy to stop, making such reactors inherently stable. Interestingly, and contrary to common wisdom, there is no relation between keff, the external source intensity, and the output power of the reactor. In this paper, I present various possible strategies to exploit this fact, and apply them to the design of a rudimentary multi-layer system that allows to reach an arbitrarily large number of fissions per source neutron, while keeping keff < 1 fixed (I used keff=0.97). The behavior of the amplifier is verified with simple Monte-Carlo transport simulations. The proposal admittedly brings complications and subtleties that need to be studied further, but, if developed, could allow to drive subcritical reactors with faint neutron sources, e.g. radioisotope based.
