I don't see how the energetics work out. (Or anything else, but I'll start stumbling there, with energy.)

There's not even a balanced nuclear equation -- cesium (element 55) needs to absorb at least four protons to from praseodymium (element 59), with no explanation at to how deuterium (with one proton and one neutron per nucleus) is supposed to do this. The device shown looks like something designed for catalytic hydrogenation, but nuclear reactions have activation barriers thousands of times higher than chemical reactions. If deuterons had been accelerated to a few tens of MeV in a cyclotron and used to bombard Cs, one might expect a little transmutation to Ba (element 56), or even La (element 57) -- but Pr ??

This is going to look as foolish as claims for cold fusion -- which is very much what it is claimed to be.

I read it backwards, and had the palladium being the (Extremely expensive) element being removed, instead of the cesium.

though they went to Mitsubishi and agreed their results made it look like it was happening; they suggested it could be contamination.

http://iccf9.global.tsinghua.edu.cn/lenr%20home%20page/PDetail4.htm#1225

The new claim seems to be that Toshiba has replicated it.

I agree that it would be nice to have a better story about what's going on.

But you have to remember we are already dealing with an unstable nucleus. There could be something going on with Cs-137's beta decay and gamma-ray emissions. Those may make it possible to transmute the Cs without slamming the D2 into the nucleus.

We'll see if this story holds up.