I read this article in a Dr's surgery back in 2011 and thought wow, this is what the world needs - a melt-down proof reactor.
http://ngm.nationalgeographic.com/2011/10/visions-now-next?rptregcta=reg_free_np&rptregcampaign=20131016_rw_membership_n1p_intl_se_c1#/next
Then I googled helium and find there is a world wide shortage of helium.......can't win,
cheers.
Compliments National Geographic.