Environment & Energy
In reply to the discussion: Russia Unveils Detailed Plans To Build 21 New Nuclear Power Units By 2030 [View all]PamW
(1,825 posts)intaglio,
We want to fission the element to destroy it. It doesn't have to be a suitable fuel.
Put your brain in gear and follow along.
Suppose I have something that is a poor fuel but is still combustible; like wet wood.
You can't build a fire with wet wood.
However, suppose I put that wet wood in an incinerator that is fed by gas.
The gas fuel keeps the fire going; and eventually that fire is going to burn up the wood.
The same is true in the nuclear case. The U-238 or thorium is like wet wood.
We fuel the reactor with U-235 or Pu-239. Those fissile elements act like the gas fuel for the incinerator and keep it going.
As long as the U-238 or thorium has a non-zero fission cross-section; which the DO; then they can be fissioned and transmuted into short-lived fission products.
Neither the U-238 nor the thorium has to sustain the nuclear reaction; the U-235 and Pu-239 will do that.
Just as the wet wood doesn't have to sustain the flame of the incinerator; the gas fuel does that.
My Lord; a CHILD could understand this; but it appears to be beyond the mental capabilities of some.
I can explain it to you. But I can't understand it for you.
PamW