Several replications of the Pd-Ni experiment are underway, but they have
not been going well. Zhang reported small excess heat. It went away, came
back, and now it has gone again. Others say it is not working. I asked
Mizuno to comment on what the problems may be. Here is a summary (not an
exact translation) of his comments and mine.

His comments:

His biggest concerns is that when he prepares the mesh and rubs Pd on to
it, he then immediately puts it into the reactor, evacuates it, and begins
the cycles of degassing, then heating and degassing, and D2 gas treatments.
Little or no time elapses from the final stages of rubbing to putting it
into the reactor. Whereas, when he prepares a mesh and then mails it, a lot
of time elapses, which may allow contamination from air, or from the
plastic packaging. In other words, the state of the mesh and Pd may change.

He thinks it might be a good idea to send someone an entire reactor that
has produced excess heat, with the mesh installed.

He would like to remind people that some Pd is hard and does not rub unto
the Ni mesh. You may need to anneal it to soften it. You have to confirm
that it has coated on the Ni.

There is a replication now underway in Japan which seems to be going well.
We hope we can soon upload a description and some data from it.

My comments:

As far as I know, no one has the equipment to do an exact replication.

Most of the cells are smaller. The methods of calorimetry are different,
although I think they should all work, because they probably do not cool
the reactor excessively. They allow a large temperature difference between
the inside and the outside. I am not sure they are all sensitive enough, or
that they will work if heat is not uniform, and is produced in hot spots in
the mesh. Some are not envelope calorimeters. They measure the reactor
temperature directly. I think the envelope method is better.

The thing the people replicating most need are high resolution SEM and mass
spectrometers. The SEM is used to determine how much Pd has coated on the
Ni. The mass spectrometer is used to determine if the gas in the cell is
free of contaminants after several repetitions of the pretreatment
described in the paper on p. 17.

Regarding his suggestion about sending an entire reactor, I have some
safety concerns about doing this. I fear there is a slight possibility it
will self-heat, which would be catastrophic if it were an air shipment.
Perhaps it would be okay to drive it in a car to someone else in Hokkaido.

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