1. American Institute of Steel Construction Charlie Carter Vice President and Chief Structural Engineer

2. ANSI/AISC N690-12Specification for Safety-Related Steel Structures for Nuclear Facilities • The current specification was recently completed and replaces the 2006 edition. • Major changes include: • A general update to remain aligned with ANSI/AISC 360-10, Specification for Structural Steel Building • Revisions to load combinations involving wind loads to align with ASCE/SEI 7-10, Minimum Design Loads for Buildings and Other Structures • Revisions to chapter on Fabrication and Erection • A new chapter on Quality Control and Quality Assurance

3. ANSI/AISC N690-12Specification for Safety-Related Steel Structures for Nuclear Facilities • The committee has just started the next code cycle and is evaluating prospective changes for the 2017 edition. • A special Supplement dealing with composite, modular wall construction is currently under development and will be issued prior to the next edition of N690 to address the recommendations of NESCC – Concrete Codes and Standards for Nuclear Power Plants: Recommendations for Future Development. (June 2011)

4. Adhoc Subcommittee on Modular Composite Construction

5. Subcommittee on Modular Composite Construction • Task: Development of Design, Analysis, Materials, Fabrication, and Erection of SC structures • Contributors: Design companies, NSSS vendors, utilities, fabricator, and regulator • Deliverable: Appendix N9 to N690 • Progress: approximately 90% of the subcommittee work is complete • Schedule: • Draft for Main Committee ballot: July 2013 • Final ANSI approved and released document: May 2015

6. Highlights of Appendix N9: Specification for Steel-Plate Composite (SC) Walls in Safety-Related Structures for Nuclear Facilities • Design Requirements • Load Combinations • Compactness • Analysis Requirements • Effective Stiffness • Geometric and material properties • Accidental Thermal Condition • Design for Tension • Design for Compression • Design for out-of-plane Flexure • Design for in-plane and out-of-plane shear • Design for combined forces • Connection Design • Design for impactive and impulsive loads