Document: NUREG-0800
Document ID: 4851d1d8-cf40-4a04-920b-1e59a44d3f2e
Document Type: srp
Title: SPECIAL TOPICS FOR MECHANICAL COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1608/ML16088A068.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.1
CFR Part: 
CFR Title: 

Content:
and reactor vessel internal components, and other non-Code items, the methods of analysis to calculate the stresses and deformations should conform to the methods outlined in Appendix F to ASME Code, Section III, Division 1, subject to the conditions addressed in Subsection III.4 of this SRP section. 3.9.1-6 Revision 4 –December 2016 Technical Rationale The technical rationale for application of these criteria to reviews performed under this SRP section is discussed in the following paragraphs: 1. GDC 1 requires in part, that SSCs important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety functions to be performed. Regulations in 10 CFR Part 50, Appendix B, set forth, in part, provisions to assure that appropriate standards are specified and included in design documents (design methods and computer programs for the design and analysis of seismic Category I Code Class 1, 2, 3, and core support structures and non-Code structures) and that deviation from such standards are controlled. Special topics for mechanical components encompass items related to design transients like components, component supports, reactor core supports, and reactor vessel internals designated as Class 1, 2, and 3 under ASME Code, Section III, and those not covered by the Code. The applicability and validity of these criteria are demonstrated by requirements that the design methods and computer programs in design and analysis be within current state-of-the-art limits and design control measures acceptable to the staff. The requirements of GDC 1 provide reasonable assurance that the regulatory requirements for design methodology and quality assurance are satisfied so that SSCs important to safety are capable of performing their intended functions. 2. GDC 2 requires, in part, that SSCs important to safety be designed to withstand the effects of natural phenomena, such as earthquakes, tornadoes, hurricanes, floods,