Document: NUREG-0800
Document ID: 0bc22ae4-5c52-4b2a-bb94-6d323cffe8b8
Document Type: srp
Title: SPECIAL TOPICS FOR MECHANICAL COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070335.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.1
CFR Part: 
CFR Title: 

Content:
DRAFT Rev. 3 - April 1996 Technical Rationale23 The technical rationale for application of these acceptance criteria to reviewing special topics for mechanical components is discussed in the following paragraphs:24 1. Compliance with GDC 1 requires that structures, systems, and components important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be performed. Related compliance with Appendix B to 10 CFR Part 50 requires that the applicant provide information that demonstrates the applicability and validity of the design methods and computer programs used for the design and analysis of seismic Category I Code Class 1, 2, 3, CS structures, and non-Code structures within current state-of-the-art limits. Further, the applicant should have design control measures that are acceptable to staff for ensuring the quality of computer programs. Special topics for mechanical components encompass items related to design transients such as component supports, core supports, and reactor 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 establishing requirements that the design methods and computer programs used in design and analysis are within current state-of-the-art limits and having design control measures acceptable to the staff. Meeting the requirements of GDC 1 provides added assurance that the regulatory requirements related to design methodology and quality assurance are satisfied so that structures, systems, and components important to safety are capable of performing their intended functions.25 2. Compliance with GDC 2 requires that structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquakes, tornadoes, hurricanes, floods, tsunami, and seiches without loss of capability to perform their