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:
nents 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 A to 10 CFR Part 100 specify that applicants include seismic events in the design basis and include seismic events in their postulated design transients. GDC 2 applies to this SRP section because the reviewer evaluates whether mechanical components are designed to withstand the loads generated by natural phenomena. The reviewer also verifies that the applicant has provided a list of postulated design transients that includes consideration of seismic events. Meeting the requirements of GDC 2 provides added assurance that structures, systems, and components important to safety will have the capability to withstand the effects of natural phenomena and thereby perform their intended functions.26 3. Compliance with GDC 14 requires that the reactor coolant pressure boundary be designed, fabricated, erected, and tested to demonstrate an extremely low probability of abnormal leakage, rapidly propagating failure, and gross rupture. DRAFT Rev. 3 - April 1996 3.9.1-6 Compliance with GDC 15 requires that the reactor coolant system and associated auxiliary, control, and protection systems be designed with sufficient margin to ensure 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 SRP section because structures, systems, and components important to safety are exposed to postulated transients anticipated during the design life of the plant. If structures, systems, and components are to perform their design functions, adequate assurance must be provided that mechanical components will remain functional under all postulated combinations of normal operating conditions,