Document: NUREG-0800
Document ID: 26aca061-b0de-4983-bbca-3fccb00afc2f
Document Type: srp
Title: PRESSURE-TEMPERATURE LIMITS AND PRESSURIZED THERMAL SHOCK1
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070431.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
he ASME Boiler and Pressure Vessel Code and that the materials in the beltline region of the reactor vessel will comply with the requirements of 10 CFR 50.60 and associated Appendices G and 38 H of 10 CFR Part 50, 10 CFR 50.61 (PWRs only), and the guidance of Regulatory 39 40 Guide 1.99, "Effect of Residual Elements on Predicted Radiation Damage to Reactor Vessel Materials."41 2. Final Safety Analysis Report (FSAR)Operating License/Combined License Reviews42 The limits in the plant Technical Specifications will be shown using real temperature. These curves and their bases are reviewed to determine acceptability in the following areas: a. The limiting RT has been properly determined, and radiation effects are NDT included in a conservative manner. b. Limits are shown for all required conditions. c. The limits proposed are consistent with the acceptance criteria described in II. above. d. The procedures for updating the limit curves, in conjunction with scheduled tests on material surveillance specimens, are well defined and included in the Technical Specifications. 3. Acceptability Determination Methods The reviewer evaluates each limit curve for acceptability by performing check calculations using the simplified methods referenced in the Code and WRC Bulletin 175 that have been verified by the Materials Engineering Branch Materials and Chemical Engineering Branch to yield conservative values. These methods are described in detail 43 by examples below, and the curves necessary to perform the calculations are included herein as Figures 1, 2 and 3.44 a. Preservice Hydrostatic Tests The preservice hydrotest at 1.25 times the design pressure corresponds to the 45 standard Code component hydrotest usually performed in the shop, but in this case it is the hydrotest for field welds, so it may involve the entire reactor coolant system. DRAFT Rev. 2 - April 1996 5.3.2-10 The Code recommends that component hydrostatic tests be run at a temperature no lower than RT + 33 C (RT +