11. Subsection NG—Core Support Structures
Mr. Keck received his BSWE (Welding Engineering) and MSWE from The Ohio State University and is a member of the American Welding Society. He is a registered professional engineer in Ohio. Mr. Keck has several patents for reactor and internal design. He is currently Chairman of ASME BPV Code Section III Working Group on Core Support Structures.
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This chapter provides commentary and some practical examples on the materials, design, fabrication, installation, and examination requirements for core support structures (CSS) in pressurized water reactors and boiling water reactors in Section III, Division 1, Subsection NG of the ASME Boiler and Pressure Vessel Code. It begins with background information on the development of Subsection NG and the definition of CSS, internal structures (IS), and threaded structural fasteners (TSF). The chapter then outlines the jurisdictional boundaries between CSS and reactor pressure vessels and the unique service loadings for reactor internals. The chapter details the material requirements in NG-2000; describes...