Unfortunately, the details are in French and I haven't been able to get Google translate to get it into English - any attempt just produces strange characters.
Now, this sounds like it could be dangerous so proceed with extreme caution. Also, I'm not sure about the viability of feeding RF into the mains, and would imagine that it is is strictly QRP.
If anyone can effectively translate this I would be interested.
A word of advice: This design could result in electrocution and is therefore potentially dangerous. I recommend that you don't attempt to build it, but if you do, you do so at your own risk.
Download the PDF.
Update: English version - thanks to Keith M0DZB