[Wonder Warthog]

"I'm bothered, though, by their method of measuring heat production ("Measurement of the produced heat was performed with high-resolution thermal imaging cameras, recording data every second from the hot reactor tube."). "

Why?? It is a perfectly straightforward and well-accepted way of measuring high temperatures. The only possibility of error is if the manufacturer's provided calibrations are in error. FAR better than the old-fashioned "hot wire" optical method that I used many years ago.

[PapaBear3625]

Why?? It is a perfectly straightforward and well-accepted way of measuring high temperatures.

I agree that it's a good way of measuring temperatures. But what needs to be measured is heat production, which is not the same thing.