Document: NUREG-0800
Document ID: e2737d9a-8e56-46cb-a97d-aaf62a442c6c
Document Type: srp
Title: PRESSURE-TEMPERATURE LIMITS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340637.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
of the operating limitations given in the Technical Specifications. In the case of older plants, the data may be estimated, using the procedures listed above, or other methods that can be shown to be conservative. 2. Operating Limitations for Fracture Toughness 2.1 Required 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) Tests at pressures less than design pressure should be conducted at temperatures calculated according to Appendix G of Section III of the Code for the beltline region (including conservative estimates of radiation damage, see Section 3.0 below) if the maximum calculated primary stress in no other region of the vessel exceeds 1.25 Sm during the test, and the RTNDT of the beltline is assumed to be at least 300F above that of the higher stressed regions. If primary stresses are calculated to be over 1.25 Sm in any region during the test, the RTNDT of the vessel must be assumed to be at least 501F higher than that of 5.3.2-15 Rev. 1 - July