Document: NUREG-0800
Document ID: 91fee075-c567-438d-bf9f-47be3177b457
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070453.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
ested so as to have an extremely low probability of abnormal leakage, of rapidly propagating failure, and of gross rupture. ESF systems such as emergency core cooling, reactivity control, and residual heat removal interface with the RCPB. Application of GDC 14 assures that ESF materials are selected, fabricated, installed, and tested to provide a low probability of significant degradation and in the extreme, gross failure of the RCPB that could cause substantial reduction in capability to contain reactor coolant inventory, reduction in capability to confine fission products, or interference with core cooling. 6.1.1-11 DRAFT Rev. 2 - April 1996 4. GDC 31 requires that the RCPB be designed to assure that when stressed under operating, maintenance, testing, and postulated accident conditions (1) the boundary behaves in a nonbrittle manner and (2) the probability of rapidly propagating fracture is minimized. ESF systems may interface with the RCPB or protect the RCPB. Application of GDC 31 assures that ESF materials are selected to provide a minimum probability of material degradation leading to rapid failure. The probability of substantial reduction in capability to contain reactor coolant inventory, reduction in capability to confine fission products, and interference with core cooling is thereby minimized. 5. GDC 35 requires that a system be provided which functions to transfer heat from the reactor core following any loss of reactor coolant. Appropriate selection of ESF materials and fluids can enhance the likelihood of achieving design emergency core cooling flow and heat transfer rates following a loss of reactor coolant, thereby minimizing fuel damage. Meeting GDC 35 through proper material selection assures that integrity of fission product barriers is maintained in the event of a LOCA. 6. GDC 41 requires that systems be provided to control the concentration of hydrogen in the containment atmosphere following postulated accidents to assure that containment