Dear Radsafe: From: _jpreisig at aol.com_ (mailto:jpreisig at aol.com) . There seems to be a conference on thorium(and U233???) at Brookhaven National Lab (USA). See their website. The main accelerator (collider) has been turned off (forever?) at Fermilab (USA). See their website. Regards, Joseph R. (Joe) Preisig, PhD