I should have visited google scholar before posting the previous as the answer was online already.
Here is good paper from Mizuno which should be part of the ongoing discussion over the merits of the nickel mesh experiments. J. Condensed Matter Nuclear Sci. 25 (2017) “Observation of Excess Heat by Activated Metal and Deuterium Gas” http://coldfusioncommunity.net/wp-content/uploads/2018/08/stripped_JCMNS-Vol25.pdf This paper is two years old but it makes the current results appear more convincing… and understandable. Mizuno quotes extensively from Mills and Holmlid. Sure, he does not see the great results until he adds the thin nano layer of palladium – but basically Mizuno started this line of research as a hybrid between dense hydrogen and P&F. This paper really fills in the needed background of where the field is heading … and it is towards the dense hydrogen approach, and away from electrolysis. Jones ---------------------------------- An important detail which may already be known to Mizuno, in the context of the recent breakthrough is the possibility of spectral line emissions in the Balmer series particularly the Balmer alpha line at 656 nm or of course any of the most energetic lines. At least one of the reactors has a window so it is possible that spectroscopy has been done already. The IR lines -Paschen/Brackett – would be expected and could be informative when analyzed but the alpha or higher Balmer series lines would be unexpected at the low temperature of this reactor since the mass energy needed for the lowest transition, the Balmer alpha line is ~1.9 eV. If there was any kind of nuclear fusion reaction going on – there would be broad Balmer lines. and If there are few, then nuclear reactions are unlikely. AFAIK - Balmer line broadening has always been seen in cold fusion when it was looked for. If gain derives from Coulomb explosions with a signature of 630 eV or from Mills type reactions, then there should be significant Balmer broadening - so the presence of strong emission lines, in itself, does not pinpoint the exact source of gain.

