from American Institute of Steel Construction:
The AISC 2011 Specification for Safety-Related Steel Structures for Nuclear Facilities AISC N690 is now available for public review. The entire draft specification is available for your review by downloading the attached document. This is an update of the 2006 version of this document ANSI/AISC N690-06. This version of the AISC Nuclear Specification uses the 2010 AISC Specification for Structural Steel Buildings as a baseline document and modifies specific portions of the Specification to make it applicable to the design, fabrication, and erection of safety-related steel structures for nuclear facilities.Comments are welcome on any portion of the draft in this first public review.
Their website also gives information for obtaining a hardcopy.