Back in the 1970's and 1980's I was told that the NRC wouldn't license a design over 3800 or 4000 MWth. The new designs must be considerably higher (another post mentions the Hitachi at 1700 MWe, seems like that must be approaching 5000 MWth core power). Was I given bad info way back when, or has the NRC/ACRS had a change of opinion that lets them consider such core designs? I can (almost) remember seeing the upper limit in print somewhere (SRPs??) but I can't find it now.