Pamela Mosier-Boss has pointed out to me that the 6% AC figure was
published in their 2007 EJPAP paper.
http://newenergytimes.com/v2/library/2007/2007BossP-UseOfCR39.pdf
The implications were not explored there.
That paper has more data on the electrolytic current protocol. A
maximum current of 500 microamps was used in the plating phase. So
400 microamps of AC current could easily have a significant effect.
There are some mysteries remaining, such as the EJPAP article
specifying an EMCO 4330 power supply, which is 0-33,000 V, and which
has a specified ripple of 0.2%. It also has max DC current at max
voltage of 300 microamps.
The supply would have been well out of specification if it had 6%
ripple. Pamela mentioned that the supply had "conked out." It might
have been ready to go for some time!
I'm not convinced that this is of any enduring importance, beyond a
suggestion that an AC current may influence electrodeposition.
No effect was alleged for electric fields on nuclear results. It's
just something they did, apparently a few times, as far as I've seen.