Think about the implications of dense hydrogen in the role of binding and 
reacting with another (larger) nucleus as if were two neutrons. This is 
completely new physics.

Such a discovery would open an entirely new world of overlooked nuclear 
reactions which were never given much hope before. It could make nuclear 
fission the top energy source once again, in the grand scheme of things and rid 
us of the false expectation that nuclear fusion has a real future. It is simply 
too expensive. 

However we cannot gauge probabilities yet, and all of this is speculative. It 
would be essential to know the cross-section of various element (for absorption 
of H*-H*)  so as to determine the commercially valuable products and isotopes. 
It might be possible to get more in value from new isotopes than from the 
excess heat of hydrogen densification... or it all could be used together so 
that fission energy becomes far more attractive than before.

Here is one kind of potential reaction that you may not have thought about. 
Thorium based.
If the H*-H* acts like two neutrons with thorium as a target, one might expect 
to convert 232Th into 234Th which has a short half-life and goes to 234Pa and 
then to 234U. Now 234U is interesting in a surprising way if it can be made 
cheaply, even though it is NOT fissile. Well, technically. it is not fissile - 
but it can be viewed as virtually fissile.

The hidden value of 234U would be because it has a long half life plus a known 
and very large cross section for neutrons. Thus in a reactor it would almost 
immediately become 235 U which is probably the best of all uranium isotopes. 
Thus a breeder reactor becomes very feasible possibly with natural U.

In short although this is a naive possibility given that we have so little data 
to look at - the H*-H* having similar reactivity to 2n - that would be 
extremely important in framing a revival of fission, and who knows what else?

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