@H-G Branzell,
When I say "at the same time" I mean that, if the plethora of experimental results is real, there must be a single mechanism that solves both problems. The probability of two "uncommon"/miraculous mechanisms at play is ZERO.
If you read the first slides of my presentation I explain my single "uncommon" ingredient. From that I get many if not all features of LENR, and the two miracles become only rare but not impossible "combinations".
First miracle: chemical energy -> nuclear barrier.
It is the nuclear force itself that gets "extended" by the electron. There is a mediator neutral particle, and it is not the neutron. This is only a slogan, but you can find some more details in my document.
The list of the best NAEs (only from the energy point of view), that I get from a single number, covers Ca(IV) (Iwamura), K(IV) (Holmlid), Zr(IV) (Swartz), Li(I) (electrochemistry and Rossi), ... Mg(II) should not too bad, but apparently it doesn't work. May be the reason is not energetic.
Second miracle: fractionation.
There are no emitted gammas in the MeV range. Only many EUV photons around 14.6 [nm]. They thermalize in very thin layers. Randell Mills measured them directly. Swartz measured non-thermalized near IR.
Third miracle: preference for stable isotopes
The reason for this miracle is only qualitative in the mechanism that I propose. There are no excited isotopes that will decay. Only in rare cases (like the presence of B10), the excess energy of newly formed alphas gets liberated as gammas instead as kinetic energy (see Iwamura's gammas).
The whole mechanism entails a new neutral relatively penetrating particle (see the "strange" radiation) and mainly EUV emissions, with sporadic gamma. So LENR are not completely radiation free. However they are incomparably better than conventional fission and fusion.