Total cost per MW is reasonable.
Source material is abundant.
Waste is not an uncontrollable environmental issue.
Here’s my understanding of what Rossi has said:
Initial cost will be 1 cent per kWh
Nickel is the 25th most common element in the world. Rossi says the amount needed for his device should not impact the cost of the raw material (meaning it doesn’t use up large quantaties)
The waste is not radioactive.
I’m hoping he’s being straight with us.
Another point. Rossi says that the catalyst (while a trade secret) is not a precious metal.
You can read ongoing dialogue between Rossi and the public at his web site here:
http://www.journal-of-nuclear-physics.com/?p=360#comments