fissionable material

基本解釋

In a hole in the center of this system is placed a subcritical sphere of fissionable material.
在這個系統(tǒng)的中心圓洞中放置一枚次臨界的球形可裂變物質(zhì)。
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，你能夠創(chuàng)造出裂變的,唯一的方式就是得到這些材料,它們是可裂變的，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.
但在核反應(yīng)堆裡，可裂變的材料很少，鏈?zhǔn)椒磻?yīng)和能量的釋放都被小心的控制。

It is fissionable material and small tactical warheads that are in danger of being stolen or sold, not the well-guarded strategic systems.
CENTERFORSECURITYPOLICY: Center for Security Policy Bear over the Barrel’: Putin’s Threats re: U.S. Missile Defenses are Strategically Hollow, Economically Unaffordable
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