Document: NUREG-0800
Document ID: c9c204f0-a162-491c-8c25-ee0418212f29
Document Type: srp
Title: PRESSURE-TEMPERATURE LIMITS, UPPER-SHELF ENERGY, AND PRESSURIZED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380185.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
5.3.2-7 Revision 2 - March 2007 designed, fabricated, erected, tested, and inspected to quality standards commensurate with the importance of the safety function to be performed. The RCPB’s primary safety functions include preventing a loss of reactor coolant through leakage or gross failure of RCPB piping or components, and acting as a containment barrier to the release of fission products in the event of an accident resulting in fuel damage. In accordance with Appendix G to Section III of the ASME Code, P-T limits are established for the RCPB to ensure the satisfaction of the RCPB material fracture toughness requirements. Compliance with GDC 1 and 10 CFR 50.55a provides assurance that the RCPB meets the appropriate quality standards of the ASME Code, and thus that the probability of RCPB material failure and the subsequent effects on reactor core cooling and confinement are minimized. 2. GDC 14 establishes that the RCPB must be designed, fabricated, erected, and tested so as to have an extremely low probability of abnormal leakage, of rapidly propagating failure, and of gross rupture. The RCPB provides for the confinement of reactor coolant and acts as a barrier to the release of fission products in the event of an accident resulting in fuel failure. The P-T limits established for the RCPB ensure that the material fracture toughness requirements for the RCPB piping and components are met and that the RCPB will act in a nonbrittle manner under operating, maintenance, testing, and postulated accident conditions. Application of GDC 14 to the RCPB, with regard to the P-T limits, provides assurance that the RCPB meets the material fracture toughness requirements and will act in a nonbrittle manner, thereby providing a low probability of significant degradation or of gross failure of the RCPB that could cause a loss of reactor coolant inventory and a reduction in the capability to confine fission products. 3. GDC 31 establishes that the RCPB must be designed with