ANSI AISC N690L-03 pdf download
ANSI AISC N690L-03 pdf download.Load and Resistance Factor Design Specification for Safety-Related Steel Structures for Nuclear Facilities
Replace section with the following: This Specification contains Load and Resistance Factor Design (LRFD) criteria for the design, fabrication, and erection of steel safety-related structures and structural elements for nuclear facilities. It is intended to be compatible with, and a supplement to, the 1999 AISC Load and Resis- tance Factor Design Specification for Structural Steel Buildings hereafter referred to as the AISC LRFD Specification. Unless stated otherwise, provisions of the AISC LRFD Specification are applicable. Only those sections that differ from the AISC LRFD Specifi- cation provisions are stated within this Specification. Section designa- tions within this Specification are preceded by the letter N to denote nuclear facility design provisions. This specification includes the list of additional symbols, the glossary of additional definitions, and the appendices. Additional provisions for stainless steel sections are provided in Section NA5.3. Specifically excluded from this Specification are pressure retain- ing components, e.g., pressure vessels, valves, pumps, and piping.
In the design of members and connections of Seismic Force Resisting Sys- tems, the AISC Seismic Provisions for Structural Steel Buildings, in gen- eral, are not applicable. However, the detailing requirements of Sections 6 and 7 of the provisions shall be appropriately considered when design- ing for plastic analysis. Single angle members shall comply with the Load and Resistance Factor Design Specification for Single-Angle Members and with this Specifica- tion. Hollow structural sections (HSS) shall comply with the Load and Resis- tance Factor Design Specification for Steel Hollow Structural Sections and with this Specification. The sponsors of any system or construction within the scope of this Spec- ification, the adequacy of which has been shown by successful use or by analysis or test, but which does not conform to or is not covered by this specification, shall have the right to present the data on which their design is based to the authority having jurisdiction for review and approval. Structures and structural elements subject to this Specification are those steel structures which are parts of a safety-related system or which sup- port, house, or protect safety-related systems or components, the failure of which would impair the safety-related functions of these systems or com- ponents. Safety categorization for nuclear facility steel structures and structural ele- ments shall be the responsibility of the owner. As used in this Specification, the term structural steel refers to the steel elements of the structural steel frame essential to the support of the required loads. Such elements are enumerated in Section 2.1 of the AISC Code of Standard Practice for Steel Buildings and Bridges. For the design of cold-formed steel structural members, whose profiles contain rounded corners and slender flat elements, the provisions of the American Iron and Steel Institute North American Specification for the Design of Cold- Formed Steel Structural Members shall be applicable.
Replace the last paragraph with the following: In addition to satisfying the appropriate ASTM specification, the specifi- cation of the material of those structures or structural components which may be subject to suddenly applied impact loads, e.g., jet shields, pipe restraint supports, pipe whip impact barriers, etc., shall be supplemented by the requirement that the material be subjected to Charpy V-notch impact tests, using the procedures described in ASTM A20/A20M. The Charpy V-notch impact test shall be conducted at a temperature not less than 30 °F (17 °C) below the lowest service metal temperature of the structural component. The acceptance criteria shall be that the material withstand not less than the energy values (average of three specimens value and individual specimen value) indicated in Table NA3.1, in addi- tion to satisfying the appropriate ASTM specification.
