I would appreciate it if someone could check my arithmetic.
Roulette data from:
http://lenr-canr.org/acrobat/RouletteTresultsofi.pdf
UO2 data from ANS and the source Terry found.
1 pellet of UO2 fuel weighs 7 g and produces as much as 3.5 bbl of oil.
3.5 bbl = 147 gallons.
As 131 MJ/gallon that's 19,257 MJ/pellet or 2,751 MJ/g UO2
1 g of oil produces 0.042 MJ
Roulette used cylindrical cathodes 100 x 2 mm = 0.314 cm3
Density of Pd = 12.023 g/cm3
So that's 3.77 g per cathode, about half of the 7 g fuel pellet
Roulette reported the longest run of 158 days (5 months), with 294 MJ
output. That's 78 MJ/g.
That is 35 times less than UO2. It is 1,857 times more than oil.
To put it another way, if Roulette had left this cathode running for
15 years, instead of 5 months, it would have produced 10,385 MJ, or
about as much as 3.77 g of UO2 (a half-pellet). The average operating
cycle for UO2 (the EFPD) is about 400 days, I think.