Before revision: This fuel has the disadvantage that unless 15N was used (in place of the more common 14N) that a large amount of 14C would be generated from the nitrogen by the (n,p) reaction.
After revision: This fuel has the disadvantage , unless 15N was used (in place of the more common 14N) that a large amount of 14C would be generated from the nitrogen by the (n,p) reaction.