Document: NUREG-0800
Document ID: 685c3a08-2aef-45d3-adfa-5101ca619cd1
Document Type: srp
Title: Revision 2 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070850035.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
CFR Part: 
CFR Title: 

Content:
to be conservative. 2. Operating Limitations for Fracture Toughness 2.1 Pressure-Temperature Operating Limitations As required by Appendix G, 10 CFR Part 50, the following operating limitations shall be determined and included in the Technical Specifications. The basis for determination shall be reported, and is the responsibility of the applicant, but in no case shall the limitations provide less safety margin than those determined in accordance with Appendix G, 10 CFR Part 50, and Appendix G to Section III of the Code. (1) Minimum temperatures for performing any hydrostatic test involving pressurization of the reactor vessel after installation in the system. (2) Minimum temperatures for all leak and hydrostatic tests performed after the plant is in service. (3) Maximum pressure-minimum temperature curves for operation, including startup, upset, and cooldown conditions. (4) Maximum pressure-minimum temperature curves for core operation. 2.2 Recommended Bases for Operating Limitations 2.2.1 Leak and Hydrostatic Tests (1) It is recommended that no tests at pressures higher than design pressure be conducted with fuel in the vessel. (2) For system and component hydrostatic tests performed prior to loading fuel in the reactor vessel, it is recommended that hydrostatic tests be performed at a temperature not lower than RTNDT plus 60 EF. (3) For system and component hydrostatic tests performed subsequent to loading fuel in the reactor vessel, the minimum test temperature should be determined as discussed in Section III of SRP 5.3.2. 2.2.2 Heatup and Cooldown Limit Curves Heatup and cooldown pressure-temperature limit curves may be determined using single pr/t stress calculations, using the method given in Appendix G of the Code. The effect of thermal gradients may be conservatively approximated by BTP 5-3-5 Revision 2 - March 2007 the procedures in Appendix G of the Code or from the report, “Tabulation of thermally-Induced Stress Intensity Factors (KIT) and Crack Tip