the three conditions of LENR and how to fulfil them

OK, let's say your three step process is a working ignition sequence. You have a few mJ pops not even measurable with MY best-of-breed calorimetry and then what? This process must be iterative without blowing out itself and die. How is this accomplished?

A sintered powder will be exceptionally porous if not compressed before heating. It will be relatively permeable to gases.

I hadn't seen that. That means his powder/ash? is 33% porous; which isn't really that high compared to a freshly poured sample, which could be about 50-60%... But still enough for gas to permeate throughout the bulk.

Compressing it would only reduce the void space further.

@"OK, let's say your three step process is a working ignition sequence. You have a few mJ pops not even measurable with MY best-of-breed calorimetry and then what? This process must be iterative without blowing out itself and die. How is this accomplished?"

Mats002, a nickelous oxide catalyst to fuse hydrogen into helium is iterative without blowing itself out if diluted with helium with the correct heat exchange mechanism arrangement. Won't die and is a great method for driving a steam turbine.