From Fukushima Diary -
[Anon leaks] NRC “SFP4 crisis may happen at US nuclear plants too”
. . . The SFP level instrumentation at U.S. nuclear power plants is typically narrow range and, therefore, only capable of monitoring normal and slightly off-normal conditions . . . .
. . . soooo there’s a giant design flaw rendering the controls useless in the event of …. a big event!