[ RadSafe ] RE: Greenpeace nuclear video

[JGinniver at aol.com]

Chris,
your correct that Sizewell B is based on the Westinghouse SNUPPS  
(Standardised Nuclear Utilities Power Plant System) and it's closest cousins in  the US 
are Wolf Creek and Callaway.  However it had a number of significant  design 
changes over the standard design.  One of these is the containment  building.  
Sizewell B has a double containment, the outer shell is  reinforced concrete 
(whose dimensions I can't remember, it may be 20cm but I  can't be sure) a gap 
of about 2 meters and an inner containment of pre-stressed  concrete whose 
thickness varies between 100cm and 130cm and which has a 6mm  thick welded liner.  
As I recall the primary containment has 50% more rebar  than any other PWR.
 
There are also lots of other design changes that were required to meet  UK 
licensing criteria.
 
Regards,
Julian