fissionable material

基本解释

In a hole in the center of this system is placed a subcritical sphere of fissionable material.
在这个系统的中心圆洞中放置一枚次临界的球形可裂变物质。
Integrated over, and the only way you can make a fission is have material that's fissionable, times the flux over the volume.
乘以，你能够创造出裂变的,唯一的方式就是得到这些材料,它们是可裂变的，乘以流量除以流量。
But in nuclearreactors, which contain far less fissionable material, the chain reaction andthe release of energy are carefully controlled.
但在核反应堆里，可裂变的材料很少，链式反应和能量的释放都被小心的控制。

It is fissionable material and small tactical warheads that are in danger of being stolen or sold, not the well-guarded strategic systems.
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Second, although Russian strategic warheads are well-guarded, large numbers of small tactical nuclear warheads and huge amounts of fissionable material usable for bombs are not, and these create a serious stockpile security problem.
CENTERFORSECURITYPOLICY: Center For Security Policy