From: vaughnsimon@gmail.invalid   
      
   "Morris Dovey"  wrote in message   
   news:jdqlg2$sh6$1@speranza.aioe.org...   
   >automatic shutdown can be completed within about a tenth of a second - which   
   >should make it much safer than the big fission reactors.   
      
   It all depends on how you define "shutdown".  In the naval reactor I used to   
   operate, I could have the rods sitting at the bottom in about a second, but the   
   reactor was subcritical after the first few inches of rod travel.  However the   
   recent debacle in Japan taught us that there can be many definitions and many   
   levels of "shut down".   
      
   Vaughn   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)