Document: NUREG-0800
Document ID: a2f24e8d-bc9b-4cc9-91c8-556b80541349
Document Type: srp
Title: SPECIAL TOPICS FOR MECHANICAL COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0704/ML070430402.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.1
CFR Part: 
CFR Title: 

Content:
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, tsunami, and seiches without loss of capability to perform their safety functions. The related requirements in Appendix S to 10 CFR Part 50 specify that applicants include seismic events in the design basis and in their postulated design transients. Pursuant to GDC 2, the reviewer evaluates whether mechanical components are designed to withstand the loads generated by natural phenomena. The reviewer also verifies whether the applicant has provided a list of postulated design transients with consideration of seismic events. The requirements of GDC 2 provide reasonable assurance that SSCs important to safety have the capability to withstand the effects of natural phenomena and to perform their intended functions. 3. GDC 14 requires that the reactor coolant pressure boundary be designed, fabricated, erected, and tested so as to have an extremely low probability of abnormal leakage, rapidly propagating failure, and of gross rupture. GDC 15 requires that the reactor coolant system and its auxiliary, control, and protection systems be designed with sufficient margin to assure that the design conditions of the reactor coolant pressure boundary are not exceeded during any condition of normal operation, including anticipated operational occurrences. GDC 14 and GDC 15 apply to this review because SSCs important to safety are exposed to postulated transients anticipated during the design life of the plant. If SSCs are to perform their design