Document: NUREG-0800
Document ID: 33a67dd5-21e3-4458-9085-803f75466a73
Document Type: srp
Title: OVERPRESSURE PROTECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070540076.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.2
CFR Part: 
CFR Title: 

Content:
ve an extremely low probability of failure during transients. 2. GDC 30 requires that the reactor coolant pressure boundary be designed, fabricated, erected and tested to the highest quality standards practical. Application of GDC 30 to overpressure protection system provides assurance that the reactor coolant pressure boundary will have an extremely low probability of failure because of manufacturing or design defects. 3. GDC 31 requires that the RCPB is designed with sufficient margin to assure that when stressed under operating, maintenance, testing, and postulated accident conditions the boundary behaves in a nonbrittle manner and the probability of rapidly propagating fracture is minimized. During certain conditions in which the RCPB might behave in a brittle manner, the overpressure protection system maintains the RCS pressure below brittle fracture limits. Application of GDC 31 to the overpressure protection system provides assurance that the RCPB will have an extremely low probability of failure because of brittle fracture. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. System Design. The staff uses the procedures below during the review to assure that the design criteria and bases and the preliminary design as set forth in the preliminary 5.2.2-9 Revision 3 - March 2007 safety analysis report (SAR) meet the acceptance criteria in Subsection II of this SRP section. The procedures below are used to verify that the initial design criteria and bases have been appropriately implemented in the final design in the final SAR (FSAR). The ASME Code requires the