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:
omponents 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, anticipated operational occurrences, postulated pipe breaks, and seismic events. Meeting the requirements of GDC 14 and GDC 15 provides added assurance that the design transients and resulting loads and load combinations (with the appropriate specific design and service limits for ASME Code, Class 1, and CS components and supports and reactor internals) form a complete basis for the design of the reactor coolant pressure boundary for all anticipated conditions and extremely low-probability events expected during the service life of the plant.27 III. REVIEW PROCEDURES The reviewer will select and emphasize material from the procedures described below, as may be appropriate for a particular case. 1. The list of transients, the number of events estimated for each transient presented in the applicant's SAR, and the method used to determine this number are compared to with28 the same information on similar and previously licensed applications and to the acceptance criteria outlined in subsection II above. Any deviations from previous accepted practice are noted and the applicant is required to justify these deviations. For Code Class 1 and CS components and supports the MEBEMEB verifies that for each 29 transient loading condition or combination an acceptable Code service limit has been specified, i.e., Design, Level A, Level B, Level C, or Level D as specified in Reference 7. Any deviations that have not been justified to the satisfaction of the staff are identified and the finding is transmitted to the applicant with a request that, unless conformance with the MEB acceptance criteria is agreed upon, additional technical justification be submitted. 2. The information pertaining to computer programs which is presented in the applicant's SAR is reviewed as follows: a. The